Supplementary Materials for theSummary of Financial Reports
3Q, FYE June 30, 2023
May 15, 2023
Nippon Koei Co., Ltd.

IR Inquiries: Corporate Communication Office c-com@n-koei.co.jp
This presentation is provided for informational purposes only and is not intended to solicit any action. Presentation in the materials(including forecasts of financial results) is based on credible information available at the time of publication and certain assumptions
Nippon Koei believes to be reasonable. Various factors may cause actual results to differ from the projected numbers or otherexpectations implied or expressed in this presentation.

1

3Q Results for FYE June 30, 2023
Orders and revenue increased year-on-year, and operating profit also increased.
Consolidatedresults•

Orders increased year-on-year due to steady progress in the Urban & Spatial Development Businessand Energy Business.

•Revenue increased year-on-year due to increases in all segments.

•Operating profit increased due to gains from the sale of shares of affiliated companies related toinvestments in the Energy Business, and gains on investments in securities.

•Quarterly profit decreased due to foreign exchange losses.

(Million yen)

FYF22/63Q
Results

FYE23/63Q
Results

YoY Change
Amount%Orders80,21592,023

11,808114.7%

Revenue

95,682

102,634

6,951

107.3%

Gross profit

31,25732,2601,002

103.2%

Operating profit

9,509

9,520

10

100.1%

Profit before tax

10,3738,580-1,793

82.7%

Profit attributable to owners of parent

7,083

4,725-2,358

66.7%
2

Results by Business Segment■FYE June 2022,3Q■FYE June 2023,3Q(Millions yen)OrdersYoY Change

3Q FYE June2022 Results

3Q FYE June2023 Results

Orders80,21592,023

11,808114.7%

Consulting

50,41251,318905

101.8%

Urban & Spatial Development

20,97327,7196,745

132.2%

Energy8,751

12,8544,103

146.9%

Other

78132

54

169.5%(Million yen)Amount50,412 51,318%

Revenue

95,682

102,634

6,951

107.3%

Consulting

54,29859,7375,439

110.0%

Urban & Spatial Development

26,90427,721817

103.0%

Energy13,906

14,575668

104.8%

Other

574

600

26

104.6%

Operating profit

9,509

9,520

10

100.1%

Consulting

6,788

5,948-840

87.6%

Urban & Spatial Development

2,644

2,000-643

75.7%

Energy

1,642

2,869

1,226

174.6%

Other-1,566-1,297268-

20,97327,7198,751

Consulting
コンサルティング

Urban & Spatial
Development
都市空間

12,854

Energyエネルギー

Revenue
54,29859,737
26,904 27,721
13,906 14,575

Consulting
コンサルティング

Urban & Spatial
Development
都市空間

Energyエネルギー

Operating profit
6,788

5,948
2,644

Consulting
コンサルティング

2,000

Urban & Spatial
Development
都市空間* Nippon Koei Urban Space Co., Ltd. (established by consolidating former Tamano Consultants Co., Ltd. and the Urban & Spatial Development Business of Nippon Koei), its
subsidiary Tamano Ecost Co., Ltd. and our consolidated subsidiary Nakaze Kamp Co., Ltd. changed their segment classification from the “Consulting Business” to the “Urban &Spatial Development Business” from the fiscal year ending June 2023. Therefore, the segment information for the fiscal year ending June 2022 is provided based on the newreportable segment classification.

1,642

2,869

Energyエネルギー

3Overview by segment
Consulting Business•

Orders: Domestic orders recovered to the same level as the previous fiscal year, and large-scale overseas orders, such as the Indian high-speed rail, also
contributed, resulting in a year-on-year increase.

•Revenue: Revenue increased due to steady progress in domestic transportation & environmental sectors, and Asian projects in the transportation sector, andon-going projects.

•Operating profit: Profit decreased primarily due to an increase in overseas travel expenses and internal administrative expenses.

Urban & Spatial Development Business•

Orders: Orders increased year-on-year due to strengthening of the BDP Group’s order acquisition system and the contribution of additional large-scale orders.

•Revenue: Revenue increased as a result of BDP in UK and Quadrangle in Canada orders from the previous fiscal year progressing smoothly and due to thedepreciation of the yen.

•Operating profit: Decreased due to increased labor costs and general administrative expenses in BDP’s business activities, the impact of inflation, and anincrease related to the construction of infrastructure for expanding business for both BDP and NKUrban.

*The actual exchange rate in 3Q of FYE June 30, 2023: ￡1=163.69 yen (the assumed exchange rate for FYE June 30, 2023: ￡1= 154.00 yen)

Energy Business•Orders: The Construction Division, the Plant Division, and the Manufacturing Division all performed well. Orders increased significantly year-on-year, especially
due to large-scale project orders in the private sector.

•Revenue: Revenue increased due to progress of large-scale power plant renovation work received from government agencies and progress of the Plant Division’s
overseas operations.

•Operating profit: While profits were sluggish due to decreased sales in the Manufacturing Division, operating profit increased due to the recording of the gain on
the sale of shares of PT.ARKORA HYDRO, which was an affiliated company of the Company, and the gain on investment into securities (+1.9 billion yen).
4FYE June 2023 Forecast
Orders, revenue and profits increased from the previous fiscal year, and there are no changes to the revenue
or profit growth plans for any segment.
(Million yen)OrdersConsulting Business
Urban & Spatial Development Business
Energy Business

Revenue

Consulting Business
Urban & Spatial Development Business
Energy Business
Other

Operating profit

Consulting Business
Urban & Spatial Development Business
Energy Business
OtherProfit attributable to owners of parentROE

FYE 2022/6
Results
131,166
84,55132,147
14,343
130,674
75,00036,091
18,799
783
9,065
7,971
2,599
1,290
-2,7966,579
8.8%

FYE 2023/6
Plan
140,000
85,00040,00016,000145,000
81,50040,00022,5001,000
11,300
9,200
2,800
2,400
-3,1006,700
8.5%

YoY Change
Amount%

8,833
448
7,852
1,656
14,325
6,499
3,908
3,700
216
2,234
1,228
200
1,109
-303
120
-0.3%

106.7%
100.5%
124.4%
111.6%
111.0%
108.7%
110.8%
119.7%
127.7%
124.6%
115.4%
107.7%
186.0%
101.8%* Nippon Koei Urban Space Co., Ltd. (established by consolidating former Tamano Consultants Co., Ltd. and the Urban & Spatial Development Business of Nippon Koei), its subsidiary Tamano Ecost Co., Ltd. and ourconsolidated subsidiary Nakaze Kamp Co., Ltd. changed their segment classification from the “Consulting Business” to the “Urban & Spatial Development Business” from the fiscal year ending June 2023. Therefore,
the segment information for the fiscal year ending June 2022 is provided based on the new reportable segment classification.

5

Topic (Consulting Business)
Design work for infrastructure inspection/diagnosis system using AI
ClientYamaguchi Prefecture Civil Engineering Department, Road Maintenance DivisionBusinessoverview

 In Yamaguchi, a lot of time and effort was needed to digitize inspection records during
periodic infrastructure inspections, so an inspection record creation support applicationthat uses AI is being built.
 Conventional inspection records made it difficult to grasp damage locations on structures,
so this will have a function associating 3D models and point information, allowing
positions to be understood as 3D models.
 A total of 830,000 items of teaching data have been prepared through cooperation andexchange with related parties, and an accuracy exceeding 80% has already beenconfirmed.
 Furthermore, a system has been built that uses AI for evaluation and diagnosis to
respond to the issue of variations in results during inspections depending on thetechnician. We plan to link these systems and build them on the cloud this fiscal year.

3D information with 3D models

Concluded partnership agreement with Iyo City, Ehime for sustainable community
development
Partner
Overview

Iyo City, Ehime Prefecture In April 2023, NK concluded a partnership agreement with Iyo City regarding
sustainable community development.
 By supporting the formulation of a regional vision and policy proposals for therealization of sustainable community development, and by assisting with themanagement of various projects related to those processes, NK will contribute to
the development of a comfortable community for the citizens of Iyo City.
 NK will also be jointly working on projects related to the “Vision for a Digital
Garden City Nation,” which aims to achieve regional revitalization and solve social
issues through the use of digital technology.

Signing ceremony

6Topic (Consulting Business)
Detailed design for the Philippines Metro Manila Subway development project
Ordered byShimizu-Fujita-Takenaka-EEI Joint Venture

Businessoverview

 We are currently involved in the development of two railways; the North-South Commuter Railway
and the Metro Manilla Subway, the first subway in the Philippines.
 For the Metro Manilla, we are in charge of detailed designs for underground stations as design
consultants for the contractor.
 Based on the results of passenger flow simulations within the station and the functionality ofstation facilities, taking barrier-free accessibility into consideration, we are examining theinstallation and layout of elevators, escalators, slopes, guide blocks, information boards, and morefrom a hardware perspective, aiming to create a station space that is easy for everyone to use.

Mock-up of an underground station platform

Establishment of the Ukraine Recovery OfficeOverview

 In April 2023, the “Ukraine Recovery Office” was established within the Consulting Operations Headquarters.
 Ukraine has suffered tremendous damage due to the Russian invasion since February 2022, and it is only amatter of time before full-scale reconstruction support work begins for the country. In addition to serving as an
accurate point of contact with outside, the office will also collect information on local reconstruction andinformation held by various study teams and departments within the company, and act as a control tower torespond in a unified manner. This will lead to enhanced collaboration among the relevant internal teams and thedevelopment of order-receiving activities more closely aligned with local needs.
 The Group has received orders from JICA for three projects related to reconstruction support for Ukraine, and wehave started operations in neighboring countries and at our headquarters with the cooperation of local partners.
 In collaboration with the Ministry for Communities, Territories and Infrastructure Development, Ministry of Energy,
Ukrenergo, local governments, and more. The project covers multiple areas of recovery and reconstruction,
including resources and energy, transportation, urban and regional development, water supply and sewage,
information and communications, and debris disposal.
 Paying close attention to the local situation, we will work on taking orders and executing work that takes safety
into consideration.

Ukrainian officials visit an agricultural site
reconstructed after an earthquake7

Topic (Urban & Spatial Development Business)
Nishi Futenma residential area comprehensive business consignment
ClientGinowan City, Okinawa PrefectureOverview

The Nishi Futenma residential area, which was used as housing for the U.S. military for
70 years since the WW2, was returned in 2015, and a land readjustment project
centered on the Okinawa Health Medical Innovation Center is currently underway. As
part of this effort, NK is undertaking construction supervision work for the Nishi FutenmaBridge (provisional name).

The bridge is a basket-handle type Nielsen-Lohse bridge, meant to protect the rare dryvalley topography known as Ishija located on the east side of the area. Durability wasimproved as much as possible to withstand Okinawa’s harsh natural environment, andwe introduced a construction method that takes an environmental conservation
perspective into consideration. The bridge aims to begin provision in the spring of 2024.

Current state of the Nishi Futenma Bridge(provisional name)

Cains Brewery Village: BOXPARK design
Overview

BDP is in charge of design for the development plan to turn Liverpool’s
historic Cains Brewery into BOXPARK, a pop-up mall made by remodelingshipping containers.

With BDP’s Adaptive Reuse mentality (efforts to not only preserve historicalbuildings, but also reuse them by adapting them to modern society), theoriginal brewery space will be transformed into a modern dining andentertainment venue.

Scheduled to open in 2023, the site is expected to attract more than amillion visitors a year after it opens.
Mock-up of development plan8Topic (Energy)
Delivery of monitoring control servers, power storage system, and DER for Akan
microgridClient

Ecolomy Inc.

BusinessoverviewWe delivered an energy management system (EMS) and power storage equipment
to manage the supply and demand of power for the entire microgrid in Akan-cho,
Kushiro City, Hokkaido.

In addition to photovoltaic power generation and power storage equipment, biogas
power generation equipment using cow manure has also been introduced to thedairy farm facilities in the town. The EMS efficiently carries out integrated control ofthese various power supply facilities.

In the event of a disaster, electricity is supplied to the 40 or so facilities in the town
using distribution lines belonging to Hokkaido Electric Power Company. This is thefirst initiative in Hokkaido aimed at building a microgrid that only uses and operates
power company distribution lines in the event of a disaster.

EMS and power storage system

Komatagawa New Power Plant: Construction of a hydroelectric power plant
ClientMitsubishi Materials Corporation

BusinessoverviewFor the first collaborative project for the Komatagawa New Power Plant inKitaakita City, Akita prefecture, NK worked with Tatung, a Taiwanese generalelectronics manufacturer, to manufacture and deliver two generators and begin
commercial operation.

In addition to the production at Nippon Koei’s Fukushima Site, Tatung’s Sanxia
Plant will serve as a manufacturing base for both the Japanese and overseas
markets, ensuring a high level of reliability and maintainability for products andimproving productivity.

The Komatagawa New Power Plant increases power generation capacity byefficiently taking in water previously released as unused energy. This contributes
to the efficient utilization of water resources through the long-term, stableprovision of renewable energy while preserving the river environment.

Insertion of a generator rotor
9