As of Apr. 2018

SEIRYU MARU (TSHD)

HAKUSAN (TSHD)

KAISHO MARU (TSHD)(TSHD= Trailing Suction Hopper Dredger)

SHIN-YURAKUCHO BLDG,
1-12-1, YURAKUCHO, CHIYODA-KU,TOKYO
100-0006
JAPAN
Tel: +81-3-3211-8830
Fax: +81-3-3211-8831
jwa@sepia.ocn.ne.jp
E-Mailhttp://www.s-jwa.or.jp
Web-site●DIGEST OF THE JAPAN WORKVESSEL ASSOCIATION (JWA)
1. History of the Japan Workvessel Association
25 June 1958: Establishment of the Workvessel Technology Association
22 July 1960: Name changed to the Japan Workvessel Association
24 December 1964: The Association was approved by the Minister of Transport as
an authorized corporation
20 July 2011: The Association became a general incorporated association as a partof the privatization of governmental associations
6 December 2017: The Plan for Public interest expenditure was completed in sixyears as planned, and the completion of implementation of the plan wasconfirmed by the Prime Minister.
2. Objectives of the Japan Workvessel Association
The Japan Workvessel Association aims to contribute to economic and social
development, and the development and conservation of national land through thedevelopment, improvement and disseminating of engineering and technology ofworkvessels, ships and related mechanical and electrical equipment.
3. Business of the Japan Workvessel Association
The Japan Workvessel Association conducts the following business to attain theabove stated objectives.
1) Research on workvessels, ships and related mechanical and electrical equipment.
2) Disseminating of engineering and technology related workvessels, ships andrelated mechanical and electrical equipment through publications and lecture
meetings
3) Research and studies on the evaluation and improvement of the performance ofworkvessels and ships, and putting their results to practical use.
4) Research and studies on the evaluation and improvement of the performance ofmechanical and electrical equipment related to workvessels and ships, andputting their results to practical use.
5) Research and studies on construction engineering using workvessels and/or ships,and putting their results to practical use.
6) Planning, basic design, cost estimation and construction supervision of building,modification and repair of workvessels and ships.

17) Planning, basic design, cost estimation and construction supervision ofmanufacture, modification and repair of mechanical and electrical equipment
related to workvessels and ships.
8) Other necessary business to attain the objectives of the Association.
4. Members of the Japan Workvessel Association
Class-1 member (Shipbuilding companies)
Class-2 member (Equipment manufacturing companies)
Class-3 member (Marine construction companies)
Class-4 member (Technical service companies)
Class-5 member (Sales companies): 8 companies: 20 companies: 20 companies: 7 companies: 1 company●ORGANIZATION

Chairman

Assistant to Director

Executive Managing Director

Executive Director

Business
Dept.

Engineering
Dept.

Research
Dept.

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Quality Control
Dept.

Designing
Dept.

●SUMMARY OF BUSINESS OF JWA
Ⅰ. Business Sector(1) Steering Committee
Business plans will be created and the agenda for Board of Directors will beprepared for the smooth conduct of business operations.
(2) Business Committee
Plans for field surveys and lectures related to the latest technology and/orutilization of workvessels, will be prepared and enacted.
(3) Periodical Journal Editorial Committee
The journal "Workvessels", issued four times a year, will be edited and distributed
to the members, central & local governments, universities and national libraries.
(4) Existing Workvessel List Editorial Committee
The latest Workvessel List existing in Japan will be investigated, updated andedited for issuing biannually.
(5) Overseas Technologies Research Committee
Information about the workvessels and related technology used abroad will becollected and introduced in the journal "Workvessel".
In addition, technologies related to Japanese workvessels and related technologies
will be presented at the World Dredging Conference (WODCON).
(6) Technical Steering Committee
Research contents will be evaluated and the research program for the next fiscal
year will be planed.
(7) Organizing Lectures on Topics of Interest(8) Issuing Publications
1) The journal “Workvessels” (Quarterly, 4 times per year)
2) “Existing Workvessel List” (Biannually, 2017 edition has been issued )3) ”Manufacturing and Repair Contract Price Index for Ship & Machinery “2017edition, supervised by the Ministry of Land, Infrastructure, Transport andTourism (MLIT)

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II．Technical Sector
1. Independent studies division ( as of 2017)(1) Research of Aerial Photography from Balloon System(2) Research of mooring system for workvessels(3) “Dredgers monitoring and control system”; ISO(TC8/WG11)(4) Study on LNG fueling technologies for work vessels(5) Review of “General sheaves for workvessels”; JIS F 3992
(6) Riprap-on work support and maintenance system for rubble mound2. Survey division
Research, planning, design, cost integration, and construction supervising ofworkvessels and related facilities
3. Technical consultation
Technical consultation on workvessels, such as statistics data, capacity of vessels,
design, construction cost integration, and accidents, etc.
III. Lectures
Lectures on technical topics of current interest and/or by public figures every year.
Past examples of the lectures held by JWA are as follows:
1) Lectures on technologies of outstanding interest
2013-7-31
Deep Sea Mining Sources-- T. Tsujimoto( Manager, JOGMEC)
2013-7-31
Japanese Energy Issues--A. Kuroki (Managing Director, IEE Japan)
2014-7-29
Japan’s ODA –M. Yamaguchi (Manager, Crown Agents, Japan)
2014-7-29
Deep Sea Research Technologies--Y. Isozaki (Director, JAMSTEC)
2015-7-28
Anchors—M. Hashimoto (President, NGK LLC)
2015-7-28
Dragging of Anchors--T. Okada (Japan Ship Owners’ P & I Club)
2016-7-26
Unmanned Aerial Vehicles; Drone--H. Kumagai(Manager, NEC NSI)
2016-7-26
Ultrasonic Technologies-- Dr. S. Matsumoto ( Manager PARI)
2017-7-24
Gas Engine--Dr. K. Takasaki (Prof. Emeritus, Kyushu Univ.)2017-7-24
Japan Coast Guard Academy--Dr. J. Michimoto (Prof. Emeritus)
2) Lectures by public figures
2013-3- 7
Jiro Asada (Novelist)
2014-3- 6
Yoichi Funabashi (Critic, formerly the editor-in-chief of Asahi Shimbun)
2015-3- 4
Tetsuo Yamaori (Religious philosopher)
2016-3- 3
Yoshiko Sakurai (President, J I N F)
2016-6-15 Hiroyuki Itsuki (Novelist)
2017-6-15 Main Kouda (Novelist)
4IV. Overseas Technologies Research Committee
The World Dredging Conference (WODCON) has been held to date since 1967(1stconference) in the USA, as a forum for exchanging information about workvessels
engaged in dredging and landfill.
1) Participation in WODCON:
From 1968 (the 2nd conference) to 2016 (the 21st conference), JWA had sent
participants to WODCON. The next WODCON( 22nd conference) will be held in
Shanghai , China in June, 2019.
2) Participation in Dredging Seminar held by Eastern Dredging Association(EADA), one of the tree operating organizations of WODCON :Three(3) persons from JWA attended an EADA Seminar held in Kolkata, India inJanuary 2014.
3) Survey of overseas advanced equipment; ①Offshore wind farm in Bremerhaven,Germany and UK, Nov. 2014, ② Pile hammer manufacturer in Kinderdijk,Netherland, Aug. 2016
4) Participation in ISO Standard creation committee for dredger monitoring &control system; ①Beijing China, June 2015, ②Sankt Peterburg, Russia, Oct.
2015, ③Papendrecht, Netherland, Aug. 2016
●SUMMARY OF CONSULTING SERVICES BY JWA(1) Surveys, Studies, Development, and Testing
JWA has received orders for surveys, technical studies, test planning, and test
implementation, etc. for workvessels and related equipment as follows:
Workvessels:- Surveys and technical studies on the automation and efficiency of Trailing Suction
Hopper Dredgers- Surveys and technical studies on the sophistication of Marine Clean-up Vessels- Surveys and technical studies on the sophistication of Research/ Survey Vessels- Surveys and technical studies on new concept workvessels, such as Dredger withDPS (Dynamic Positioning System)- Surveys and technical studies on transportation Shuttle Boat for seabed mineral
resources- Technical studies on automatic mooring system
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- Surveys and technical studies on the Ocean-going vessels for remote island
management
Marine Clean-up System (Sea Surface Cleaning & Oil Recovery ):- Surveys, technical studies and testing of oil recovery equipment and systems- Surveys, technical studies and testing of recovery, cutting & separation forgarbage & sea-lettuce- Development studies of shallow water floating garbage recovery devices

Observation Equipment:- Surveys, technical studies and testing of Aerial Photography from Balloon
Systems- Surveys, technical studies and testing of sea-water suspended solids researchequipment and systems- Surveys, technical studies and testing of underwater obstacle detecting equipment
and systems- Surveys, technical studies and testing of unmanned vehicles
Measures for Reduction of Exhaust Gas, Noise & Vibration- Surveys, technical studies and testing of exhaust gas reduction measures forworkvessels- Technical studies on reducing rolling/pitching/heaving for workvessels- Technical studies on reducing noise/vibration for workvessels
Others- Surveys, technical studies and testing on riprap input operation support systems- Surveys and technical studies of crisis management systems by workvessels- Technical studies on long-period wave upset reduction systems- Surveys of integration index for workvessels & machines

6(2) Design and Supervising Work for Workvessels
JWA has received orders for technical studies, concept & basic designs, preparationof technical specification, cost estimation, drawing review for approval, andconstruction supervision, etc. of workvessels and related equipment as follows:- Concept & basic design, preparation of technical specification, cost estimation, andconstruction supervision of Trailing Suction Hopper Dredgers- Construction/ modification design, preparation of technical specification, costestimation, and construction supervision of Marine Clean-up Vessels (Sea Surface
Cleaning & Oil Recovery Vessels)- Construction/ modification design, preparation of technical specification, costestimation, and construction supervision of Research/ Survey Vessels- Construction design, preparation of technical specification, cost estimation, andconstruction supervision of Waterway Preservation/ Patrol Boats- Construction/ modification design, preparation of technical specification, costestimation, and construction supervision of Port Service/ Patrol Boats- Construction design, preparation of technical specification, cost estimation, andconstruction supervision of Marine Clean-up Vessels- Construction design of the Ocean-going Vessels for remote island management- Construction design of the LNG fueled Vessels- Construction/modification design, preparation of technical specification, anddrawing review of Floating Piers/Port Facilities- Quantity calculation of GPS Wave Meters- Design studies of Dredging Systems for deposited sands in dam lakes- Support for design and procurement of Dredgers for dam lakes- Studies on dosing system for Waste Repositories(3) Maintenance & Management of Workvessels
JWA has received orders for actual surveys, technical studies of construction,
preparation of technical specification, cost estimation, etc. for maintenance andmanagement of workvessels and related equipment as follows:- Trailing Suction Hopper Dredgers- Marine Clean-up Vessels (Sea Surface Cleaning & Oil Recovery Vessels)- Research Vessels- Waterway Preservation Vessels- Port Service / Patrol Boats7

(4) Overseas Business Projects
JWA has received orders for design, bidding support, documents review, andsupervision at shipyards for workvessels and related facilities as follows:- Basic design, bidding support, construction supervision of dredger fleet for theGeneral Company for Ports of Iraq (Phase-I)(Location)
Basic Plan(Tokyo and Jordan)
Bid support(Tokyo and Jordan)
Construction supervision(Tokyo, Netherlands & South Korea)
Trailing Suction Hopper Dredger(Netherlands)
Self-propelled Grab Dredger(Netherlands)
Self-propelled Crane Vessel(South Korea)- Basic design of workvessel fleet and Procurement support of land equipment for
the General Company for Ports of Iraq (Phase-II)
Pilot Station Vessel(Tokyo)Buoy Tender Vessel(Tokyo)Water Tanker(Tokyo)Mooring Buoy(Tokyo)
Land Equipment ;Forklift, Mobile crane, Back hoe, Damping Lorry, Vacuum
suction truck, H.P. water jetting truck(Tokyo)- Design and procurement support services of dredgers for dam in Malawi
Backhoe Dredgers(Tokyo)Hopper Barges(Tokyo)Pusher Barges(Tokyo)- Concept design of floating port facilities for Vietnam
Imported Coal Loading Facilities(Tokyo & Vietnam)

8JWA MEMBER COMPANIESJWA is composed of five (5) classes of member companies as follows:(Total 56 companies)
As of Apr. 2018
Class-1 Member (Shipbuilding Co.)Class-3 Member (Marine Construction Co.)JMU AMTEC

Ohtaki-Kohmuten Engineering Co., Ltd.

Japan Marine United Corporation

Ohmoto Gumi Co., Ltd.

IHI Corporation

Kanmon Kowan Kensetsu Co., Ltd.

Kanagawa Dockyard Co., Ltd.

Penta-Ocean Dredging Co., Ltd.

Kawasaki Heavy Industries, Ltd.

Kojima-Gumi Co., Ltd.

Mitsui E&S Shipbuilding Co.,Ltd.

Penta-Ocean Construction Co., Ltd.

Mitsubishi Shipbuilding Co., Ltd.

Shinko Kensetsu Corporation

Niigata Shipbuilding & Repair, Inc.

Takenaka Civil Eng. & Construction Co., Ltd.
Toa Corporation
Toyo Construction Co., Ltd.

Class-2 Member (Equipment Manuf. Co.)

Tomac Corporation

Kamome Propeller Co., Ltd.

Nippon Kaiko Co., Ltd.

Kurimoto, Ltd.

Fukada Salvage & Marine Works Co., Ltd.

Koei Iron Works Co., Ltd.

Fudo Tetra Co., Ltd.

Kobelco Construction Machinery Co., Ltd.

Mirai Construction Co., Ltd.

Sanwa Kikoh Co., Ltd.

Yoshidagumi Co., Ltd.

Sanwa Kizai Co., Ltd.

Yorigami Maritime Construction Co., Ltd.

Daihatsu Diesel Co., Ltd.

Nissan-Rinkai Construction Co., Ltd.

Nakashima Propeller Co., Ltd.

Wakachiku Construction Co., Ltd.

Niigata Power Systems Co.Ltd.
Nishishiba Electric Co., Ltd.
Hitachi Construction Machinery Co., Ltd. Furuno

Class-4 Member (Technical Service Co.)Electric Co., Ltd.

IMC Co., Ltd.

Minotsu Iron Works Co., Ltd.

Marine GPS Promoting Solution

Yanmar Co., Ltd.

Marine Technology Institute Corp.

Sekigahara Seisakusho Ltd

Research Institute for Ocean Economics

Denyo Co., Ltd.

Japan Association of Cargo-Handling Machinery

Marine Hydro Tech Co. Ltd.

SystemsCaterpillar Japan LLC

Japan Port Consultants Ltd.

SKK Corporation

Hikari Industrial Co., Ltd.

Japan Radio Co., Ltd.

Class-5 Member (Sales Co.)
Nippon Quaker Chemical , Ltd.

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Dr. KAIYO (Marine Clean-up Vessel)

BAY-SEARCH (Research Vessel)

UMIWAKA-Maru (Marine Clean-up Vessel)

COSMO (Survey Vessel)

KAIKO (Marine Clean-up Vessel)
10ISHIZUCHI (Marine Clean-up Vessel)

NAJIMA (Port-Service Boat)

KAIKI (Marine Clean-up Vessel)

HAYATAMA (Port-Service Boat)

SOKAKU-Maru (Marine Clean-up Vessel)11