An Introduction to
Japan Prefabricated Construction
Suppliers and Manufacturers Association

Association
Information

Association Overview
Purpose of the Association
Our association was founded in January 1963 as an organization playing a central role in developing the industrial
production of housing and promoting the modernization and rationalization of the construction industry. In January of
the next year, under the joint jurisdiction of Japan’ s Ministry of Construction (currently the Ministry of Land,
Infrastructure, Transport and Tourism) and the Ministry of International Trade and Industry (currently the Ministry of
Economy, Trade and Industry), we became an incorporated association. Further, in October 2013, we got a new start as a
general incorporated association that aims to promote the creation of a rich living environment and high quality social
capital through research and development on prefab architecture as well as its construction and propagation.

Main Business Activities
In addition to a range of initiatives aimed at improving the quality of prefab architecture, such as developing
technologies and human resources, the association’ s main business activities include supporting the provision of
temporary emergency housing in the event of a disaster and offering recommendations to governments and others.
◆ D riving demand for high-quality prefabricated housing andbuildings (prefab architecture) produced in factories

ing support for provision of temporary emergency housing andpromotion of provision of public housing for victims of disaster◆ Conducting surveys and research, developing technologies,◆ Promoting protection of the global environment through suchand creating technical standards to ensure quality and improvethings as promoting environmental action and the 3Rs (reduce,

performance of prefab architecture

reuse, recycle) in prefab architecture◆ Conducting quality certifications, structural inspections, and◆ Production of high-quality building and housing stock throughqualification certifications to improve the quality of prefab ar-such things as inspection training and determining earthquake

chitecture◆ Initiatives to develop human resources and improve customer
satisfaction in relation to prefab architecture◆ Recovery and reconstruction in the event of a disaster, includ-

resistance◆ Offering recommendations to governments, the Japan Housing
Finance Agency and others to promote high-quality prefab architecture

Behavior Charter of the Association
As leaders in the industry, companies with outstanding technical capabilities for creating high-quality spaces andenvironments will collaborate through the Association to conduct the following activities. The aim is to create a richer,more dynamic and sustainable society even in times of seriously declining birthrates and aging populations.
◆ Considering safety and security◆ Considering the global environment

populations, members will work to improve quality andpromoting initiatives for carbon neutrality, a circular society, andIn light of the current declining birthrates and aging

performance of buildings and housing, in terms of safety,
durability, energy efficiency, and comfort, to ensure the safety
and security that underpin our lives. In addition to creating local
infrastructure with outstanding disaster-related resilience andsafety, members will also work toward rapid restoration of the
lives of victims, and recovery and reconstruction of
infrastructure in disaster-affected areas, in the event of adisaster.

◆ Creating a“ stock-type society” throughconstruction of high-quality buildings and houses

Through the advancement of prefab architecture technologies,
members will provide high-quality buildings and housing withoutstanding earthquake resistance, energy efficiency and othercharacteristics, and will create rich cityscapes. By improving thequality of existing buildings and housing through renovation andother methods, members also aim to contribute to thedevelopment of a “stock-type society” where high-quality building
and housing stock can be used by successive generations, andto help realize a richer society.

◆ Creating markets that meet new needs

coexistence with nature to ensure the beauty of the global
environment is here for future generations.

◆ Making international contributions

Taking advantage of the outstanding production technologies

of industrialized housing, members will expand their businessactivities in a range of countries to help improve housing
conditions and address related issues. They also aim to help
realize a globally cooperative society through such things aspromoting technology exchange and participating in recovery
efforts after disasters.

◆ Developing human resources

To develop a sustainable industry, members will work to

improve and pass on the technologies and skills of prefabarchitecture. At the same time, they will implement education,
guidance, and awareness activities to develop human resourcesable to respond to new needs that change with the times.

◆ Implementing digital transformation (DX)initiatives

Members aim to improve customer service, reform workstyles
a n d i m p r o v e p r o d u c t i v i t y, w h i l e a c h i e v i n g s u s t a i n a b l e

Members will work to create markets that meet the needs ofthe times through such things as creating rich communities anddevelopment of the housing industry, by changing businessproviding services that meet new needs arising from thetechnologies.

changing values of residents.

02

Members aim to help realize a sustainable society by actively

processes through the use of AI, the IoT, and other new digitalOrganizational Structure
The Association consists of six committees , a First-Class Architects’ Office, four branches and a Secretariat.

HOKKAIDO Branch
Chapters

CHUBU Branch
KANSAI Branch
KYUSHU Branch

GeneralAssembly

Board ofDirector

Project Management Committee

PC Architecture Committee
Housing CommitteeStandardized Architecture
Committee
Public Relations Committee
Education Committee
Committee on Warranties andInsurance against Defects
First-Class Architects’ Ofﬁce
Secretariat

Association member qualification and benefits
There are three types of Association membership; regular members, associate members, and supporting members.

◆ Regular membership
1. Companies engaged in production and sale of materials directly
required in prefab architecture

Category

2. Companies engaged in construction or sale of prefab architecture

Company

3. C ompanies engaged in production and sale of construction

type #2 onmachinery for prefab architecture
A company that satisfies any of the above requirements, and hasbusiness performance that meets the criteria on the right, is eligible to bea regular member of the Association. Regular members can attend andexercise voting rights at the General Assembly. They can also participate in

the left
Company
type #1 or#3 on theleft

Business performance
criteria
Architecture for 300 or
more houses, or 30,000m2
or more of total floorarea, each year
Equivalent to 300 or morehouses, or 500 million yen
or more of sales, eachyear

committee activities.

◆ Associate membership

A company that satisfies any of the above requirements, but is not qualified to be a regular member, is eligible to be an

associate member of the Association. Associate members can participate in committee activities.

◆ Supporting membership

A company or organization (representative of an organization that does not have corporation status) that endorses the

purpose of the Association is eligible to be a supporting member of the Association. Supporting members can receive
information about the Association, participate in workshops, seminars and other training, and interact with othermembers at New Year receptions and other events.

◆ Applying for membership
Submit membership
application

Consult on preferredcommittee membership

Obtain approval of theBoard of Directors

Receive notiﬁcationof membership

Companies wishing to become members must submit the prescribed application for approval from the Board of
Directors.
To become a regular member, companies must be endorsed by two existing regular member companies.
To become an associate member, companies must be endorsed by two existing regular or associate member
companies.
To become a supporting member, companies do not require an endorsement.

03

PrefabricatedArchitecture Features
What is Prefab
Architecture?
Prefab Architecture
Prefab architecture is an architectural method thatbuildings that are mainly concrete structures, is auses many more prefabricated components thanconstruction method that uses on-site assembly of

traditional methods. Components are initially produced

factory-made precast concrete components. It has wideand processed in factories before final construction at

application from medium- and high-rise buildings throughthe building site. There are three main types of prefab

to skyscrapers.

architecture.

Standardized architecture, meaning buildings that

Prefab housing, meaning detached houses anduse lightweight steel frames as their main structural

rental housing built as homes, includes a number ofcomponents, is a construction method for uniform

construction methods such as on-site assembly of

production of consistent and standardized components

wooden, iron and steel, or concrete panels, or on-sitein factories. The resulting assembled houses or modular

assembly of factory-made unit housing (modules).

houses have wide application from temporary housing to

PC architecture, meaning medium- and high-risepermanent buildings.

Prefab Architecture Features

1

Uniform and High-Precision Quality

2

High-Quality Construction

3

Key building materials are produced under rigorous quality controls infactories with state-of-the-art technologies including computers and robots tocreate housing with uniform and high-precision quality.

Much of the on-site work is performed in a factory, and as a result, thebuilding materials are consistent and standardized, which makes possible
simple yet high-quality construction.

Substantial Reduction in Construction Time

Since emphasis is placed on factory production, there is little reliance on theskills of workers, as in the case of conventional construction methods. On-site
work is reduced and construction times are greatly shortened. The ability to
put a building into use quickly, depending on its intended use, is one of thebenefits of prefab architecture.

4
5
04

Cost Reduction

The factory production method clarifies cost management, and prices arealways set appropriately. In addition, extensive streamlining efforts are madein all stages from materials purchasing to production equipment and on-site
construction, resulting in lower total costs.

Added-Value Technology and Performance

Factory production makes possible added-value technologies andperformance that are difficult to achieve at the construction site such as
special processing methods and painting methods.

High-Quality, High-Performance Buildings
Association members provide high-quality, high-performance buildings.

Prefab Housing
Prefab housings leads the industry in terms of the long-term high-quality housing and net zero energy houses(ZEH) that the Japanese government is promoting.

Percentage of detached houses that are long-term high-quality housing
ational target for85.5 % of houses provided by member companies have obtained ※ (N2025
is 20% ofcertification as long-term high-quality housing (fiscal 2021)

What is long-term high-quality housing?

housing)

Energy eﬃciency

Long-term high-quality housing is housing that has been accredited by
the relevant government agency according to the Act on the Promotion of
Dissemination of Long-life Quality Housing.

Versatility

Earthquake
resistance

It has outstanding levels ofearthquake resistance, durability, and universal design, it has a maintenanceand management plan, and it can be used in good condition for a long peri-

Universal design(common areas)

od of time.
Deterioration
countermeasures

Percentage of newly constructeddetached houses
that are net zero energy houses

Ease of maintenance,
management and replacement

Source: “Certification System Overview Pamphlet (New Construction),”Ministry of Land, Infrastructure, Transport and Tourism website

64.9 % of houses provided by member companies

Net zero energy houses provide a comfortableinterior environment at the same time asachieving roughly net zero, or better, annual
consumption of energy in dwellings.

are net zero energy houses (fiscal 2021)

What are net zero energy houses (ZEH)?
Net zero energy houses (ZEH) aim to achieve net zero outlays on
primary energy consumption in dwellings through adoption of ther-

Reducing energy
requirements as much as
possible through highinsulation performance(Homes that are cool in summer andwarm in winter)mal insulation structures for external walls and windows, etc., highefficiency equipment systems, and renewable energy.

Efficient use ofenergy throughhigh-performanceequipment
Heating
Cooling
Ventilation
Lighting
Water heating

Creating energy

ReducedHeating
Cooling
Ventilation
Lighting
Water heating

Source: Ministry of the Environment website

PC Architecture
PC architecture provides a range of high performanceother disasters, but precast concrete buildings exhibitfeatures required of structures, including disasteroutstanding fire resistance that can be a usefulresistance, faster construction times, and quieter, labor-

local disaster mitigation measure that prevents fires

saving, resource-saving operations at construction sites.

from spreading. Even exposure to flames has no impact

These features help address construction worker

on the durability of these structures in the event of ashortages and contribute to achieving the Sustainable
Development Goals (SDGs).
● Various technologies have been developed, including

normal fire.
● Steel-reinforced concrete structures have excellent
structural safety in terms of external forces, such ascompressive force and impact loads. They have good

methods for joining precast components, to give PC

strength against typhoons, tornadoes, snow and otherarchitecture the same or better structuralexternal pressures, and demonstrate resistance to all

characteristics as reinforced concrete buildings that aremanner of disasters.

created on-site. As a result, PC architecture provides a● S teel-reinforced concrete structures have longer

high level of impact resistance to earthquakes, which

lifespans, and are less subject to deterioration, thangives it outstanding earthquake resistance.

other structures. Precast components in particular have

Excluding the effects of ground deformation and minor

a lower frequency of cracking when dry, compared todamage, there have been no reports of damage toon-site poured concrete, because they use a dry

precast concrete buildings from past earthquakes.

consistency concrete with little water. They enable● W ith the main structural components being non-creation of a structural frame with excellent resistance

combustible steel-reinforced concrete, PC architecture

to neutralization and outstanding durability due to

can minimize damage in the event of a fire. Fires are atheir high density.

frequent secondary disaster related to earthquakes and05

Pc Architecture
Committee

The PC Architecture Committee comprises 70 member

construction management of buildings constructed forcompanies that provide medium- and high-rise buildings

various purposes using one of the precast concrete con-using precast concrete construction methods (as of De-

struction methods. It also compiles and publishes techni-

cember 1, 2022).

cal documents and works to ensure or improve the quali-

The committee operates four inspection and certification systems for design, component manufacturing, andty of precast concrete buildings through reliable process
management and engineer development.
W-PC method:

1 Precast concrete construction methods

Wall-type precast steel-reinforced concrete structures(5 ﬂoors max.)

High-rise W-PC method:

Wall-type structures

Wall-type precast steel-reinforced concrete structures

PS method:

Wall-type prestressed precast steel-reinforced concrete
structures

Precast steel-reinforced
concrete structures

WR-PC method:

Wall-type Rahmen(rigid frame) structures

Wall-type Rahmen precast steel-reinforced concrete
structures (15 ﬂoors max.)

R-PC method:

Rahmen precast steel-reinforced concrete structures

SR(H)-PC method:

Rahmen (rigid frame)
structures

Precast steel frame steel-reinforced concrete structures

PS-PC method:

Prestressed precast steel-reinforced concrete structures

 our inspection and certification systems for design,
2 F

component manufacturing, and construction management

With enactment of the Building Standards Act and the Housing
Quality Assurance Act, the Association created an inspection
system for buildings constructed using precast concrete
components, and began structural inspections of precast
concrete buildings.

The PC Architecture Committee inspects and certifies theperformance and quality of precast concrete components at thefactories where they are made.
(As of December 1, 2022, 79 factories in Japan and 2 factories
overseas have been certified.)

Precast concrete structure
inspection system

Precast concrete component
quality certiﬁcation system

Precast concrete building
construction management engineer
qualiﬁcation certiﬁcation
systemComponent manufacturing

Assembly and constructionof components

DesignDesi gnComponent designFirst-Class Architects’ Oﬃce (Japan PrefabricatedConstruction Suppliers and Manufacturers Association)

Design supervision
Precast concrete component
manufacturing management engineer
qualiﬁcation certiﬁcation system

06

The PC Architecture Committee inspects and certifies the knowledge
and technical capabilities of management engineers at factories thatmake precast concrete components.
(As of December 1, 2022, 305 engineers have been certified.) hree typical precast concrete construction methods proposed according to
3 Tarchitectural conditions and intended use

Wall-type precast construction method

W-PC method

Low- and medium-rise housing complexesThis construction method produces box-type
structures comprising precast concrete components (wall, ﬂoor and ceiling panels) manufactured
in factories. Components are assembled on-site bycrane, joined by welded steel reinforcing rods andmechanical joints, and integrated into a single unit
with joining concrete.

Wall-type Rahmen (rigid frame)
precast construction method

WR-PC method

Medium- and high-rise housing complexesThis construction method employs single wallcolumns and precast concrete beams in the girder
direction, and the same precast concrete components in the beam direction, with composite ﬂoors
using voided slabs or half ﬂoor slabs for the ﬂoors
and ceilings. Wall columns, walls and beams arejoined to the ﬂoor and integrated into a single unit
by on-site poured steel-reinforced concrete.

Rahmen (rigid frame)
precast construction method
High-rise housing complexesThis construction method uses precast concrete
components (pillars, beams, walls and ﬂoors),
depending on the situation, joined by on-site
poured steel-reinforced concrete. Rahmen reinforced concrete buildings are partially precast,which gives this method comparatively fewer
restrictions in planning compared to the WR-PC
method.

Full-thickness slab

Balustrade

Scope

・ Floors: 5 or fewer
・ Eave height: 20 m or less・ Floor height: 3.5 m or lessFeatures・ A lack of beam forms in party
walls creates a cleaner layout
compared to normal Rahmen
structures. Utility sleeves canalso be created in the wallcolumns.
・ Internal ﬂoors use composite
ﬂoor panels that ensure sufﬁcient beam depth, whichenables reduced ﬂoor height.

Scope

・ Floors: 15 or fewer
・ Eave height: 45 m or lessFeatures

R-PC method

The PC Architecture Committee inspects
and certifies the knowledge andtechnical capabilities of management
engineers involved in construction
management of precast concretearchitecture.
(As of December 1, 2022, 438 engineers
have been certified.)Features・ Wall-type structures provide
living spaces without the intrusion of internal pillars or beams.
・ Fixtures are attached to theprecast concrete components,
providing outstanding water
resistance.
・ On-site concrete pouring is
minimized, which reduces
construction times.

・ With characteristics of bothconventional methods andprecast concrete methods, thismethod offers considerable
freedom in planning.
・ Use of precast concrete components for the exterior of
dwellings (walls, hallways,
balconies) achieves outstanding water resistance and durability.

Wall

GirderWall

Half ﬂoor

Non-loadbearing wall
Column wall

GirderBeam wall

Pillar form
Half ﬂoor

Non-loadbearing wall
Steel-reinforced
pillar assembly

4 Compilation and publication of technical documents

Completed building07

Housing
Committee

The Housing Committee comprises 20 prefab housing

spread. In addition, it proactively utilizes various

manufacturers as of December 1, 2022. Playing aperformance evaluation indices, such as housing

leading role in the industry, it engages in activities withperformance labeling and Building Energy-efficiency

the aim of creating high quality living spaces andLabeling System (BELS), to display advanced

residential environments and realizing a rich society full

performance of industrialized housing in an easy-to-of vitality, through both construction and R&D ofunderstand manner while also improving performance. It

industrialized housing. It also strives to create an axis foralso prepared, and updates, the Disaster Response

joint efforts among the member companies to quickly

Manual (Housing Committee Edition) to enable a rapid

adapt to government policies and changes in the

response to the large-scale disasters that are occurring

environment surrounding the housing industry.

with increasing frequency recently.

In October 2021, the Housing Committee formulated
and announced, and is currently implementing, theHousing Life Improvement Plan 2025, which is a 5-year❷ Developing“ stock-type society” of highquality housing

medium-term plan for the committee in line with the

The Housing Committee is working to provide high-Basic Housing Policy approved by the Japanese Cabinet

quality new housing, through certification of long-termin March 2021.

high-quality housing and other measures, to promote

1 Activities of the Housing Committee❶ Efforts in further ensuring safety andsecurity, advanced technology andperformance improvement in housing

The Housing Committee is working on developing

advanced housing and its technology, and promoting its

utilization of housing stock from a long-term perspective.
It is promoting the flow of high-quality existing housing
through appropriately managed maintenance of existing
housing, promoting renovation to maintain and improve
its performance quality, and other measures such as
certification of inspection engineers.

❸ Opening up new initiatives and technologies in housing in response to the needs ofsociety and the times
The Housing Committee is working to promote newlifestyles, such as multi-regional living, digitaltransformation, and sharing of information between
committee members to help realize new dwellings for the“new normal” and digital transformation.

❹ Contributing toward raising the level of
housing life through environmental
friendliness in housing and town planning
In response to the Japanese government’ s goal ofcarbon neutrality by 2050, efforts to realize adecarbonized society are accelerating. The Housing
Committee aims to increase use of net zero energy
houses (ZEH) at the dwelling stage, while driving
decarbonization through the housing life cycle at thefactory production, transportation, and construction

082）Holding seminars and symposiums〈Housing Committee seminars〉

These seminars offer opportunities for mutual
information exchange and interaction between
member companies with the aim of sharing thelatest government policies on housing andstudying contemporary issues. (Held once a
year)

stages. It will also implement initiatives to help create acircular society and encourage coexistence with nature.
❺ Contributing to improvement of international
housing and living environments

In addition to actively disseminating informationinternationally about Japan’ s industrialized housing
technologies, living environment technologies, andactivities of the Japan Prefabricated Construction
Suppliers and Manufacturers Association, the Housing
Committee also shares overseas initiatives by member
companies with the aim of contributing to improved
living environments globally.

〈Environmental symposiums〉

These symposiums offer opportunities toprovide the latest information on theenvironment and homes, to report on progress
toward environmental targets, and to reportcase studies of member company initiatives forthe environment. (Held once a year)〈Household and town planning symposiums〉

These symposiums offer opportunities toexchange information on research activities,
and report case studies of initiatives, related tothe state of residential developments in an age
of declining birthrates, aging populations, anddeclining populations. (Held once a year)❻ Developing human resources andenhancing information dissemination on
housing
The Housing Committee aims to improve the skills ofmembers through various types of workshops andsymposiums. To create better housing and an improved
living environment, it seeks to communicate with various
stakeholders, such as residents, by actively providing
appropriate information. It also carries out activities suchas facility tours, and reporting on the results of its
surveys and research.

3）Announcing survey and research results・ Method for determining earthquake resistance ofindustrialized housing・ Supply service management standards for prefabhousing1）Providing training courses and certification
systems・ Maintenance guidelines for long-term high-quality
housing・ Prefab Architecture Meister Certification System

・ Design guidelines for favorable living environments

・ Prefab Housing Inspection Engineer Course

・ Proposal for townscape scenery appraisal

・ Prefab Housing Renovation Coordinator Course

・ Guidelines for replacement components for housing

09Standardized
architecturecommittee

Introduction to the Standardized
1 Architecture Committee
The Standardized Architecture Committee comprises
member companies (14 companies as of December 1,

 isaster-related initiativesD
2 (construction of temporary
emergency housing in the event of
a disaster)2022) involved in manufacturing, designing, selling or

One of the activities of the Standardized Architectureleasing assembled houses or unit houses constructed

Committee is construction of temporary emergency

with prefab construction methods. With 50-plus years of

housing in the event of a disaster, which is a public ser-history and achievements, the committee is working tovice it offers to ensure the safety and livelihood of disas-develop technologies, and improve construction andter victims. Committee member companies operate fac-quality management, to meet the diversifying needs andtories and depot centers at 176 locations nationwide (asapplications of buildings associated with the rapidof April 30, 2022), creating a temporary emergency

development and changes of the times.

housing supply system that can respond to disasters

Assembled houses and unit houses have the benefits

anywhere in Japan.

of reduced variability of quality and high-quality

Member companies understand the importance of de-construction achieved through uniform production ofveloping a construction system that is able to provide

consistent and standardized structural components in

temporary emergency housing for people impacted byfactories. They also exhibit outstanding durability,

disasters as quickly as possible. They are therefore im-

airtightness, thermal and sound insulating properties,

plementing initiatives to verify the processes of tempo-

and comfort, while achieving safety through earthquake

rary emergency housing construction, through experi-

and fire resistance.

ence of various natural disasters around Japan, and to

Taking advantage of the properties of this systemreview specifications and planning for buildings. Member

architecture, these houses have diverse and widecompanies are also promoting the use of digital trans-application, from temporary housing to permanent

formation (DX) as below to enable construction of tem-buildings, as offices, shops, warehouses, event venues,

porary emergency housing to begin quickly after a disas-and education, medical, or welfare facilities. Temporary

ter occurs, to ensure that residents of that housing can

housing, in particular, will continue contributing to society

maintain favorable living conditions, and to achieve high-going forward through reuse and recycling that

quality construction.

addresses resource and environmental issues.

・ Creation of simple site plans based on data from the
Global Navigation Satellite System (GNSS)・ Support for creating layout plans using artificial
intelligence (AI) technologies
・ Integrated operation, from design to construction,

Use of a layout plan zoning support system

10maintenance and management, using Building
Information Modeling (BIM)・ Manpower and labor savings in on-site work andmanagement through use of smart glasses
There is a high probability of large-scale disasters occurring in the future, including earthquakes in the Nankai

Desktop exercises (virtual training)

Trough and directly under Tokyo. The Association hasentered into agreements with 47 prefectures, and 12 cities designated for relief implementation , to constructtemporary emergency housing in the event of a disaster(as of December 1, 2022). To continue fulfilling its roles
and responsibilities as a signatory to these agreements,
and create systems for rapid and smooth provision of
temporary emergency housing even during normal times,
it works every year to compile materials on constructionof temporary emergency housing, and maintain close re-Regional response drills (virtual training)lationships with the various government ministries andagencies, the prefectural governments and others
through visits and constructive discussion.

Initiatives for ensuring the safety3
and quality of temporary buildings
The Standardized Architecture Committee cooperated
in creating the draft of, and publishing, the Japanese Industrial Standard JIS A 3304 “Standard of structural design systems on the prefabricated temporary houses. ”
This standard defines structural design systems andtesting methods for the main structural components that
ensure the safety and quality of temporary buildings
provided by the committee.
To ensure the safety of buildings through appropriate
storage and inspection of reusable structural components, the committee also published the 4th edition of“Operation Management Guidelines and Commentary on
Reusable Steel Frames ” for reusable buildings on April 1,
2022. It also complies with and implements these guidelines.
As part of this, the committee is helping to address
resource and environmental issues while ensuring safety.
This includes the appointment and renewal of a Reusable
Steel Frame Component Operation Manager , the improvement of building knowledge among individual com-conduct virtual training once a year (desktop exercises
in construction of temporary emergency housing). The
purpose is to develop a system that enables rapid andsmooth construction of temporary emergency housing,with sharing of the latest information and establishmentof centralized construction plans, based on the pastexperience and achievements of the committee.
To enable local member companies to quickly respondby constructing temporary emergency housing nomatter where a disaster occurs throughout Japan,
temporary emergency housing construction response
drills are also conducted locally.

5

Participation in prefectural
emergency drills

The Association participates in comprehensive
emergency drills held by each prefecture. These drills
are large-scale comprehensive events where local
residents, governors and other relevant local government
parties participate. They include exhibits of temporary
emergency housing models, and display panels withphotos of the most recently constructed temporary
emergency housing, as part of efforts to provide greater
information on temporary emergency housing.

mittee members, and a yearly workshop geared towardtaking examinations for steel frame manufacturer andmanagement engineers.

Initiatives for desktop exercises
4 in construction of temporary
emergency housing
In the event of a disaster, a system that provides a
rapid and smooth initial response must be established,
and a large volume of temporary emergency housing
must be constructed. This requires the development andmaintenance of a collaborative supply system where
each member company’ s engineers and public relations
people work according to a common standard.
As part of its normal activities, and with thecooperation of member companies, the Standardized
Architecture Committee therefore uses an actual site toParticipating in emergency drills

11

Education
Committee

The Education Committee engages in the following

activities with the purpose of improving the quality ofmember company employees in the fields of sales,

production, engineering, construction, after-sales service,reform and others.

1 ertifying prefab housingC
coordinator (PHC) qualifications

In contemporary times, housing business employees

require advanced knowledge covering diverse fields fromarchitectural regulations in housing business to financial
planning. To meet these demands of the times, a systemfor certifying the qualifications of housing businessemployees as prefab housing coordinators (PHC) was

set up in 1989 and training courses and certification
exams are being held on a nationwide scale. As of theend of March 2022, a total of 35,082 qualified persons

have been registered. Educational texts have also beencreated for the purpose of providing general knowledge

on housing, and they are revised roughly once every two

years, with the latest edition (16th edition) being
published in April 2023.

2

Holding housing industry CS
conventions

Housing industry CS conventions have a long history,
starting from 1976 with the TQC Convention (later
renamed the TQM Convention), with a total of 47 being
held through fiscal 2022. In a typical year, examples ofCS activities of each member company are announced
and timely special lectures are held regarding activities
for improving customer satisfaction in different businessfields, which contribute greatly to the expansion andimprovement of CS activities in each member company.

3

Holding courses on improving
prefab architecture quality

Courses to improve prefab architecture quality havebeen held annually in Tokyo and other localities startingfrom 2001. Persons in charge of practical business andleaders active on the front lines of each field (production,
design of individual residences, construction, and after-

sales service) learn the basics of quality control, conduct

m
a
s

ple

photographresearch on issues in each field, and exchange
information between themselves, according to the theme

chosen each year. The courses contribute greatly to
improved quality of prefab architecture.

4

Conducting questionnaire surveys
on trustworthy residential planning

From 1994, the Education Committee has been

conducting questionnaire surveys of clients centering

around the performance of sales reps. Questionnaires
are mailed to 1,2 00 clients who have purchased newly
built homes from the nine prefab housing manufacturers
among the member companies and lived in them for an
average of one year, and their responses are received.

Based on the results of these surveys, the Association

works to improve the prefab housing coordinator system
and raise the level of the business managers’
performance.

12

Committee On
Warranties And
Insurance
Against Defects

On the basis of the Act on Assurance of Performanceof Specified Housing Defect Warranty (Housing DefectWarranty Fulfillment Act), which took effect on October

1, 2009, any business supplying newly built housing has
an obligation to ensure its financial ability to fulfill its responsibilities toward defect warranties by depositing security funds or taking out insurance.

As an “organization supplying housing of high quality,”
our association is treated as a specified organization (orapproved organization) by the housing defect warranty
liability insurance corporations (five companies) specified
by the Minister of Land, Infrastructure, Transport andTourism, and when our member companies take out
insurance to ensure their financial ability, a committee
has been set up to promote defect warranty insurance
for the purpose of appropriate planning andmanagement of measures that must be taken.

The main tasks of the Committee
1 to promote defect warranty
insurance include① P lanning and management of mattersnecessary for ensuring financial ability
through defect warranty liability insurance(group insurance)② Creating standards for ensuring quality of
housing making use of group insurance
systems③ Training group inspectors certified as the
specified (approved) organizations, andother matters

The advantages of qualifying for
2 specified group (certified group)
insurance include① Discounted insurance premiums
When our member companies and theiraffiliated companies apply for group insurance
through the offices of our organization, they
can receive a discount ※ 1 on insurance premiums
compared to applying for general housing
insurance.

② For group insurance, inspection is
implemented internally
When applying for general housing insurance,
two on-site inspections conducted by insurance
corporations are necessary (when arranging
basic reinforcement and upon completion ofroof), but when applying for group insurance, it
is possible to have the basic reinforcement
arrangement inspection done by groupinspectors from one’ s own company whose
qualifications have been certified by the group. ※2

Having one’s own company’s group inspectors
conduct the basic reinforcement arrangement
inspection provides reduced fees for the firstinspection and the possibility of smootherprogress management because schedule
adjustment for inspectors from insurance
inspector organizations becomes unnecessary.
※ 1: For details on the group insurance discount anddiscount rates, enquire with our association.
※ 2: In some cases, group self-inspection may not be
possible. In addition, onsite inspections are notrequired if the housing comes with housing
performance evaluation at construction.
③ Flow chart
Application for defect warranty liability insurance
Commencement of building construction
Inspection of basic reinforcement arrangement
by internal inspectors
Construction of building frame
Inspection upon completion of roof
Certiﬁcation of building inspection
Issuing of insurance policy

13

Association History
Year

Association History

Disaster Response

・Japan Prefabricated Construction Suppliers andManufacturers Association founded

1963

・Six committees established (Public Housing Component
Committee, Housing Committee, General Construction
Committee, Materials Committee, Equipment Committee,
and Construction Machinery Committee)

1964

・ Public Relations Committee established1965

・ Equipment Committee and Construction Machinery
Committee merged and Equipment and Machinery
Committee established1966

・ Public Housing Component Committee changed name to
Public Housing Committee
・ General Construction Committee, Materials Committee andEquipment and Machinery Committee merged and General
Committee established1967

・ Medium- and High-Rise Housing Committee established

1969

・ Chapters established in Kansai, Chubu, and Hokkaido

1971

・ General Committee disbanded and separate Assembled
Temporary Building Department established1972

・After large Niigata earthquake, mass-produced public housing constructed (414 units) toaid reconstruction

・ Medium- and High-Rise Technical Committee established・ Chapter established in Kyushu
・ Assembled Temporary Building Department changed nameto Standardized Architecture Committee

1973

・ Education Department and Service Department established

1975

・ Precast concrete construction welding qualification
certification system launched・ Agreement concluded with Kanagawa Prefecture to construct temporary emergency
housing in the event of a disaster

1978

・ Survey of damage conducted after Miyagi Offshore Earthquake

1979

・ Agreements concluded with Tokyo, Shizuoka Prefecture, and Aichi Prefecture to conduct
emergency response operations in the event of a disaster

1980

・ First-Class Architects’ Office established・ After the October 3 volcanic eruption on Tokyo's Miyake Island, temporary emergency
housing (total of 340 units) constructed for disaster victims in the Kozu and Ako-Shitasabi
districts of the island

1983

1989

・ Agreement concluded with Gifu Prefecture to conduct emergency response operations in
the event of a disaster・ Agreement concluded with Chiba Prefecture to construct temporary emergency housing in
the event of a disaster・ Precast concrete component quality certification system
launched

1990

・ After a tornado destroyed homes in Chiba's Mobara City, temporary emergency housing (14buildings, 28 units) constructed for disaster victims in the city's Takashi district

1991

・ After a volcanic eruption of Mount Unzen’s Fugen-dake peak, temporary emergency housing(1,277 units) constructed

1993

・ After the July 12 Okushiri Earthquake in Hokkaido, temporary emergency housing (408units) constructed on Okushiri Island

1994

・ After the January 17 Great Hanshin Earthquake (Kobe earthquake), temporary emergency
housing (39,526 units) constructed, including 5,620 by the Housing Committee and 33,906
by the Standardized Architecture Committee

1997

・ Promoting appropriate reuse of temporary emergency housing used for the Great Hanshin
earthquake, prefab (standardized) buildings constructed overseas (Peru) for the first time
under the Grant Assistance for Grassroots Projects scheme , part of Japan’ s Official
Development Assistance (ODA) - 192 units purchased by Hyogo Prefecture
・ Agreements concluded with all prefectures to construct temporary emergency housing in
the event of a disaster

1998

1999

14

・ Temporary emergency housing, used for the Great Hanshin earthquake, leased to the
Azores, Portugal (100 units) and to China, Palau and others (about 400 units)・ After landslides caused by heavy rains and Typhoon Vicki , temporary emergency housing
constructed in Tochigi Prefecture (3 units) and Nara Prefecture (21 units)
・ Temporary emergency housing constructed after heavy rainy season rains in Hiroshima
Prefecture (30 units), after Typhoon Bart in Kumamoto Prefecture (13 units) and after
floods in Iwate Prefecture (30 units)

Year

Association History

Disaster Response
・ After a volcanic eruption of Hokkaido’ s Mount Usu, temporary emergency housing (734units) constructed, with unit houses being used for the first time alongside assembled
houses2000

・ Precast concrete structure and building inspection system
launched・ After heavy rains centered on the Tokai region, temporary emergency housing constructedin Gifu’ s Keinan region (13 unit houses), and after the Tottori Earthquake, temporary
emergency housing constructed in Tottori Prefecture (28 units) and Shimane Prefecture (9units)
・ After landslides in Niijima Island, caused by an earthquake in the waters off Niijima andKozushima Islands associated with volcanic eruptions in the Izu Islands, temporary buildings
constructed for Wakago Elementary School, Niijima (unit houses)

2001

・ After heavy rains in the western part of Kochi Prefecture, temporary emergency housing (10units) constructed

2003

・ After the July 26 earthquake in northern Miyagi Prefecture, temporary emergency housing(162 units, 10 locations, 5 towns) constructed

2004

・ After heavy rains in Niigata Prefecture and Fukui Prefecture, Typhoon Namtheun, Typhoon
Meari, Typhoon Tokage, and the October 23 Chuetsu Earthquake, temporary emergency
housing constructed (total of 3,950 units)

2005

・ Precast concrete building construction management
engineer qualification certification system launched・ After the March 20 Fukuoka Earthquake and Typhoon Nabi, temporary emergency housing
constructed (total of 273 units)

2006

・ Medium- and High-Rise Housing Committee changed nameto PC Architecture Committee

・ After the March 25 Noto Earthquake, temporary emergency housing constructed (334units)
・ After Typhoon Man-yi and heavy rains, and the July 16 Chuetsu Offshore Earthquake,
temporary emergency housing constructed (total of 1,231 units)

2007
2008

・ Insurance Operations Department established in response
to enactment of the Act on Assurance of Performance ofSpecified Housing Defect Warranty

・ After the June 14 Iwate-Miyagi Nairiku Earthquake, temporary emergency housing
constructed (71 units)

2009

・ Association office relocated to M&C Bldg., 3-13, 2-Chome,
Kandaogawamachi, Chiyoda-ku, Tokyo・ After Tropical Storm Etau, temporary emergency housing constructed in Hyogo Prefecture(42 units)・ After the March 11 Great East Japan Earthquake, temporary emergency housing
constructed in Iwate Prefecture, Miyagi Prefecture, Fukushima Prefecture, Tochigi
Prefecture, Chiba Prefecture, and Nagano Prefecture (total of 43,260 units consisting of
14,546 units by the Housing Committee and 28,714 by the Standardized Architecture
Committee)

2011

・ After Tropical Storm Talas, temporary emergency housing constructed in Nara Prefectureand Wakayama Prefecture (total of 101 units)

2012

・ Precast concrete component manufacturing management
engineer qualification certification system launched・ After the heavy rains across northern Kyushu, temporary emergency housing constructed in
Fukuoka Prefecture (25 units)・After the heavy rains across Yamaguchi Prefecture and Shimane Prefecture, temporary
emergency housing constructed in Yamaguchi Prefecture (40 units)

2013

・ Association changed from an incorporated association to a
general incorporated association

・ After Typhoon Danas, temporary emergency housing constructed in Kagoshima Prefecture(25 units)・ After Typhoon Wipha, temporary emergency housing constructed in Tokyo (46 units)・ After the Great East Japan Earthquake, public housing designed and supervised (1,095
units, 12 housing estates over 3 years)

2014

・After the November 22 Nagano Earthquake, temporary emergency housing constructed in
Nagano Prefecture (35 units)

2015

・ After the May 29 volcanic eruption of Mount Shindake on Kuchinoerabu Island, temporary
emergency housing constructed in Kagoshima Prefecture (27 units)・ After the April 14 and 16 Kumamoto Earthquakes, temporary emergency housing
constructed in Kumamoto Prefecture (3,605 units)

2016

・ After Typhoon Lionrock, temporary emergency housing constructed in Iwate Prefecture(171 units)・ After the July heavy rains, temporary emergency housing constructed in Okayama
Prefecture, Hiroshima Prefecture, and Ehime Prefecture (total of 348 units)

2018

2019

・ After the September 6 Hokkaido Eastern Iburi Earthquake, temporary emergency housing(208 units) and social housing (144 beds) constructed in Hokkaido Prefecture

・ Prefab Architecture Meister Judging Committee established・ With the partial revision of the Disaster Relief Act, started to renew agreements on
construction of temporary emergency housing in the event of a disaster with prefectures inwhich cities designated for relief implementation are located・ Actively provided ongoing proposals for disaster reconstruction projects and publishedPublic Housing Reconstruction Using Precast Concrete Construction Methods as asummary of the 10 years since the Great East Japan Earthquake, and publicized precast
concrete construction to relevant bodies

2021

2022

・ After Typhoon Hagibis, temporary emergency housing constructed in Miyagi Prefecture,
Nagano Prefecture, and Ibaraki Prefecture (total of 313 units), and social housing (76 beds)
constructed in Saitama Prefecture

・ 60th anniversary commemoration ceremony held for the
Association
・ Published 60-year chronology of the Association

15

Japan Prefabricated Construction Suppliers
And Manufacturers Association
M&C BLDG ., 3-13 2-CHOME, KANDAOGAWAMACHI,CHIYODA-KU, TOKYO 101-0052 JAPANKanda River

TEL +81-3-5280-3121
FAX +81-3-5280-3127

Shinjuku

JR Ochanomizu Station

Akihabara/Kanda

E-mail: info@purekyo.or.jp

Access by subway●1 -minute walk from the B7
Exit of Ogawamachi Station on the Toei Shinjuku Line●1
 -minute walk from the B7
Exit of Awajicho Station on the Marunouchi Line●1
 -minute walk from the B7

JR
Exit of Ochanomizu Station●1
 3-minute walk from the North

Yasukuni-dori Avenue

M&C
Building Ogawamachi

B7

Note. Parking not available at M&C Building◇ KYUSHU BranchTokyo◇ KANSAI Branch

Sudacho
1-ChomeTsukasamachi
2-Chome

Exit of Kanda Station◇ HOKKAIDO Branch ◇ CHUBU Branch

SudachoAwajicho

JR Kanda Station●1
 0-minute walk from the Hijiribashi

Surugadai-Shita

Hongo-dori Avenue

Exit of Shin-ochanomizu Station on the Chiyoda Line

Surugadai

Sotobori-dori Avenue

Hijiribashi

Chuo-dori Avenue

URL https://www.purekyo.or.jp

March 2023