Supplementary Materials for Summary ofFinancial Reports 3Q FYE June 30, 2024

May 15, 2024
Integrated Design & Engineering Holdings Co., Ltd.
Stock code: 9161

Results for 3Q FYE June 2024
Orders, revenue, and operating profit increased steadily to the highest level ever.

Consolidatedresults•

Orders increased year on year because of strong performance in all three segments (Consulting,Urban & Spatial Development, and Energy).

•Revenue increased in all three segments because of steady growth in projects on hand.

•Operating profit increased because of strong performance in the Energy Business, despite a decline
in profit in reaction to special factors. Due to the recording of valuation gains associated with thelisting of company shares, the Group acquired capital in the Consulting Business.

(Million yen)Orders
Revenue
Gross profit
Operating profit
Profit before tax
Profit attributable to owners of parent

FYE June 2023
3Q Results

FYE June 2024
3Q Results

92,023
102,634
32,260
9,520
8,580
4,725

104,582
115,700
36,856
13,911
14,091
9,003

YoY Comparison
Amount12,55813,065
4,595
4,391
5,510
4,277%
113.6%
112.7%
114.2%146.1%
164.2%
190.5%※Integrated Design & Engineering Holdings Co., Ltd was established as the sole parent company of Nippon Koei Co., Ltd. through a share transfer on July 3, 2023, and has newly
prepared the condensed consolidated quarterly financial statements from the first three months ended September 30, 2023. Since there has been no substantial change in the scope ofNippon Koei’s consolidated group, Nippon Koei’s consolidated results for the nine months ended March 31, 2023 (July 1, 2022, to March 31, 2023) and as of June 30, 2023, have beenused as comparative information. For comparison, the Company made an adjustment of reclassifying its group company El Koei Co., Ltd. from the Consulting business segment to theothers.
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Results by Business Segment(Million yen)Orders3Q FYE June
3Q FYE June
2023
2024
Results
Results
92,023
104,582

Amount%51,087

12,558113.6%

51,08756,354

5,267

110.3%

27,71932,2184,499

116.2%

12,854

15,6842,830

122.0%

363

324

-38

89.4%

Revenue

102,634

115,700

13,065112.7%Consulting Business
Urban & Spatial
Development Business
Energy Business

59,506

60,831

1,325

102.2%

27,72132,3104,589

116.6%

14,57521,756

7,180

149.3%

831

801

-29

96.4%

Operating profit

9,520

13,911

4,391

146.1%

Consulting Business
Urban & Spatial
Development Business
Energy Business

5,866

9,505

3,638

162.0%

2,000

2,063

62

103.1%

2,869

2,309-559

80.5%

Other

-1,21633

1,250-

Consulting Business
Urban & Spatial
Development Business
Energy Business
Other

Other

■3Q FYE 2023/6 ■3Q FYE 2024/6 (Million yen)OrdersYoY*As a result of reorganization and spin-offs, each company’s head office business management expenses, which were previously
borne by “Other,” became borne by each segment since FYE June 2024.

56,35427,71932,21812,854 15,684
363

Consulting

Urban & Spatial Development

Energy324

Other

Revenue
59,506 60,831

27,72132,31021,756
14,575831

Consulting

Urban & SpatialDevelopment

Energy801

Other

Operating profit
9,505
5,866
2,000 2,063

2,869

2,309
33

Consulting

Urban & Spatial
Development

Energy-1,216

Other

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Performance Outline by Business Segment
Consulting Business■Orders: Orders received for work related to Japan's national land resilience and defense contributed to the record-high order amount.

■Revenue: Revenue increased due to steady progress in orders for projects on hand both in Japan and overseas.

■Operating profit : Even though personnel costs are increasing in Japan and outsourcing costs are increasing overseas due to the effects of theweaker yen and inflation, which is pushing down profits, operating profit increased due to an increase in valuation gains (approx.
4 billion yen) associated with the listing of shares of companies the Group acquired capital in.

Urban & Spatial Development Business■Orders: Increased from the previous year due to the contribution of large additional orders for public works projects in the U.K. by theBDP Group.

■Revenue: Revenue increased mainly owing to steady progress in orders on hand for the BDP Group.

■Operating profit: Operating profit increased, as the increase in BDP Group sales offset the downward pressure on profits due to changes in theaccounting method for administrative expenses resulting from the spin-off of companies in Japan.

*The actual exchange rate on 3Q of FYE June 2024: 1￡=185.42 yen (the actual exchange rate on 3Q FYE June: 1￡=163.69 yen; the assumed exchange rate for FYE June 2024:1￡= 163.69 yen）

Energy Business■Orders: Strong performance owing to demand related to the renewal of electric power facilities under the revenue cap system* andadditional orders for projects on hand.

■Revenue: Revenue increased due to steady progress in large-scale power plant projects on hand, additional orders, and renewable energy
EPC projects.

■Operatingprofit: Although operating profit decreased due to a rebound from the gains in the sale of PT ARKORA HYDRO (a former affiliate) sharesand investment gained in securities (approximately 1.9 billion yen) in the same period of the previous year. System improvements
have been progressing smoothly toward profit generation.

* General transmission and distribution utilities develop business plans and forecasts for investment and expenses, which are reviewed and approved by the government, and thenCopyright Ⓒ Integrated Design & Engineering Holdings Co., Ltd. All Rights Reserved.
wheeling charges are set.

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FYE June 2024 Forecast
We aim to set new record highs for orders, revenue, and profits.
(Million yen)FYE June
2023 Results

FYE June
2024 PlanYoY Comparison
AmountReview of cost burden for each segment%

Orders139,265

155,000

15,734111.3%

Consulting Business

77,71286,0008,287

110.7%

Urban & Spatial Development Business

42,56643,000433

101.0%

Energy Business

18,82726,0007,172138.1%

Revenue

141,527

156,000

14,472110.2%

Consulting Business

81,81888,0006,181

107.6%

Urban & Spatial Development Business

38,07142,0003,928

110.3%

Energy Business

20,85525,0004,144

119.9%

782

1,000

217

127.9%

Operating profit

6,080

11,1005,019

Consulting Business

6,599

7,400

Urban & Spatial Development Business-946

Energy Business

Other

As a result of reorganization and spin-offs,
each company’s head office business
management expenses, which were previously
borne by “Other,” will now be borne by eachsegment.
▼FY2024 operating profit plan reference values
using conventional accounting methods(Million yen)

Reference YoY Comparison
value
Amount%182.5% Operating profit

11,100800

112.1%

8,068

1,469

122.3%

2,7003,646-

3,306

4,252-

2,974

2,200-774

74.0%

Consulting Business
Urban & Spatial
Development Business
Energy Business

2,276-698

76.5%

Other-2,546-1,2001,346-

Other-2,550-4-

Profit attributable to owners of parent

3,093

7,100

4,006

229.5%

ROE

3.9%

9.0％

5.1pt

5,019 182.5％

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Project highlight (Consulting Business)
Launch of “LIANA Mesh”

Development of technology for predicting urban
damage by monitoring earthquake ground motion
 A joint research team comprised of members from the International ResearchInstitute of Disaster Science at Tohoku University and Nippon Koei hasdeveloped technology that can instantly predict damage to buildings
throughout a city in the event of an earthquake. The technology utilizes aseismograph observation network.

 Service began for LIANA Mesh, a new low-cost fixed-rate service plan for
LIANA, which is a service for corporations and municipalities that uses
satellite data to monitor slope, ground, and infrastructure changes withmillimeter- to centimeter-level accuracy.

Overview

 The plan was designed to be easy to use and less burdensome for thosewith a limited workforce and daily costs. It was a response to recent
frequent disasters and the increasing aging infrastructure that has
become a social issue.
 It contributes to creating safe and secure communities by supporting
decision-making for preventive maintenance by those on the ground,
thereby reducing their anxiety regarding disasters.

LIANA Mesh
LIANA Mesh is not available outside of Japan.

Overview

 A demonstration study of this technology is currently underway for a portionof Sendai’s Aoba Ward (about 32,000 buildings), which are subject todamage from earthquakes caused by the Nagamachi-Rifu Line fault zone.
 Suppose further necessary data is developed and simulations can beconducted. In that case, this technology can become even moresophisticated and is expected to be utilized in actual pre- and post-disasterprevention projects.

Example images of the technology being developed
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Project highlight (Consulting Business)
Support for the development of reconstructionplans in Türkiye
ClientOverview

Japan International Cooperation Agency (JICA)
 Awarded the “Project for Earthquake Risk Reduction and Prevention
Planning for Bursa Metropolitan Municipality” and “Local Authorities
Capacity Building for Waste Management, Pollution Control, and Disaster
Management and Response Project” in Türkiye*, participating in technicalsupport that will contribute to improving the disaster risk management andwaste management capabilities of local governments.
 As part of the additional support following the Türkiye-Syria earthquake that
occurred on February 6, 2023, we are also working to help develop arecovery and reconstruction plan for the Kahramanmaraş to help achieve
better reconstruction.
 In addition to supporting the drafting of plans based on our understandingof earthquake disaster risks, we have utilized our experience in formulatingplans for disaster recovery and reconstruction support in Japan, including
the Great East Japan Earthquake, by incorporating citizens' voices throughpublic comments.

Sihanoukville Port New Container Terminal
Expansion Project
ClientKingdom of Cambodia
 The port of Sihanoukville in Cambodia is an important logistics
hub for the Cambodian economy and is expected to become atransit base for logistics throughout ASEAN.

 Despite strong economic growth, the volume of container cargohandled Sihanoukville Port is increasing, and the handling
Overview
capacity of existing facilities is expected to be approaching itslimit.

Workshops were held with local government officials to listen to their opinions*A joint order project between three companies, with Eight-Japan Engineering Consultants Inc. and Yachiyo Engineering Co., Ltd.

 Under these conditions, the “Sihanoukville Port New Container
Terminal Expansion Project” is being implemented as an ODA
project. We will be responsible for detailed design, bidding
assistance, and construction supervision duties.

Container cargo at the port of Sihanoukville
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6Project highlight (Urban & Spatial Development Business)
Design work for East-West Line of Jakarta MRT inIndonesia

Oak Cancer Centre

ClientClientDirectorate General of Railways of the Ministry of Transportation, Indonesia

 Oak Cancer Centre has formally opened as a state-of-the-art
research and treatment facility that will help accelerate thedevelopment of new cancer treatments.

 The Indonesian government is expanding its public transportation system, andthe MRT (Mass Rapid Transit railway) in Jakarta is being developed withJapanese assistance. Phase 1 of the North-South Line, Jakarta’s first MRT andwhich Nippon Koei was responsible for planning and design, etc., opened in
2019, and construction of the northward extension is currently underway, with
Nippon Koei continuing to be engaged in construction supervision.

Overview

 A joint venture headed by Nippon Koei (JMCA*) was awarded the basic design
work for the first stage of Jakarta’s second MRT line, the East-West Line (totallength exceeding 80 km), and said work was completed in January 2024. A
team of urban planning specialists from Nippon Koei Urban Space wasmobilized to develop a plan for station area development and TOD (TransportOriented Development) that would contribute to increasing the number ofpassengers and generating non-fare revenue on the East-West Line. A study isalso underway to examine the use of government assets along the line inconnection with the relocation of the capital.

Example image of Jakarta MRT East-West Line stationarea development (prepared by JMCA)*JMCA is composed of Nippon Koei Co., Ltd., Oriental Consultants Global Co., Ltd., Systra S.A., PT. MatraRekayasa Internasional, PT. Jaya CM Manggala Pratama, PT. Perentjana Djaja, and PT. Yasa Guna.

The Royal Marsden NHS Foundation Trust and ISG

Overview

 The design provides a reassuring presence and advancement
for patients. It brings together more than 400 scientists andresearchers into a space designed specifically to encourage
collaboration. Using the very latest technology, it provides
advanced lifesaving treatments and faster diagnosis for morepeople. All chemotherapy bays are oriented towards alandscaped garden, providing patients with views of greenspace. Additionally, the outpatient department streamlines thepatient experience by offering convenient access on the samefloor.

Oak Cancer Centre

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Project highlight (Energy Business)
Akita Rinkai Processing Center energy supply
center project
ClientOverview

Akita Prefecture

Large-scale renovation of Miwa Power Plant
Client Akita Prefecture will install renewable energy power generationequipment at the Akita Rinkai Processing Center to promotedecarbonization and self-reliance regarding power consumption for somepublic facilities, including the center.
 For this project, a microgrid will be constructed based at the Akita Rinkai
Processing Center, and renewable energy generated through digestiongas, wind power, and solar power will be supplied directly to a group of
public facilities while balancing supply and demand using storage
batteries, energy management systems (EMS), hydrogen production andutilization facilities, etc.
 Our key technology, “renewable energy + storage batteries & EMS,” andour design and construction experience in microgrids were evaluated ashaving high project feasibility and operational plan reliability.

Project details

OverviewNagano Prefectural Enterprise Bureau The Miwa Power Plant (Nagano Prefectural Enterprise Bureau) has
been in operation for 62 years, continuing to deteriorate andnecessitating the need to make it earthquake-resistant.
 In addition, due to the Miwa Dam redevelopment project, a portion of
the flood season power generation capacity was transferred to flood
control capacity, which required modifications based on changes fromthe previous power generation operation.
 Nippon Koei Energy Solutions and Nippon Koei Urban Space
cooperated to introduce a design and construction package method forlarge-scale renovation work utilizing the FIT new installation category,
proposing a rapid and reliable renovation plan, reduced project costs,
and shortened construction and power generation periods.

Miwa Dam
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8Inquiries on IR-related matters
Corporate Communication Office,
TEL:03-5276-2454

MAIL: c-com@n-koei.co.jp

This presentation is provided for information purposes only and is not intended to solicit any action.
Materials in this presentation (including financial results forecasts) have been prepared based on
credible information available at the time of publication and certain assumptions ID&E Group
believes to be reasonable. Actual results may differ significantly due to various factors.

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