TOKYO ENGINEERING CONSULTANTS

What TOKYO ENGINEERING CONSULTANTS does

Tokyo Engineering Consultants (株式会社東京設計事務所, TEC Group) is a Japanese water infrastructure consulting firm founded in 1959 and headquartered in Chiyoda-ku, Tokyo. The company provides investigation, planning, design, and construction supervision services across eight core divisions: water supply, sewer, public-private partnership (PPP/PFI), disaster prevention, environment and energy, information/digital transformation, CDP water security, and global business. Approximately 400 staff operate domestically across 45+ offices covering all 47 Japanese prefectures, with roughly 50% of technical personnel holding Professional Engineer (技術士) credentials.

The firm's underlying technology combines traditional civil, architectural, mechanical, and electrical engineering applied to water infrastructure with a digital layer that includes BIM/CIM, AI-driven pipe deterioration diagnostics, 3D fluid analysis simulation, IoT-enabled smart meter utilization, drone-based spherical inspection robots with gas detection, and a proprietary weather hazard support system for flood-risk alerting. It holds five registered patents on pipe crossing and siphon configurations and maintains ISO 9001, 14001, 27001, and 55001 certifications.

Revenue is generated primarily through public-procurement consulting contracts with the Japanese national government, prefectures, and municipalities, supplemented by overseas development assistance (ODA) projects intermediated through JICA and the Asian Development Bank across 60+ countries. Secondary revenue streams include CDP water security scoring advisory for corporate ESG disclosure (100+ engagements since 2017) and climate-adaptation consulting. The firm reports 18 consecutive periods of profitability and operates as a wholly-owned subsidiary of TEC Holdings, established via stock transfer in October 2014. In June 2025, the company absorbed subsidiary TEC International and TEC Electro Dynamics to consolidate international operations.

Name

TOKYO ENGINEERING CONSULTANTS

Legal name

株式会社東京設計事務所

Website

https://tokyoengicon.co.jp

Company type

Private

Founded year

1959

Operating status

Operating

Headcount range

101–250 employees

Short description

Tokyo Engineering Consultants is a Japan-based engineering consulting firm founded in 1959 that provides investigation, planning, design, and construction supervision for water supply, sewerage, and environmental infrastructure to government clients domestically and JICA-channeled ODA projects across 60+ countries.

Ownership category

akta.pro rank

Product category

Water Infrastructure Consulting

NAICS

Engineering Services (54133), Environmental Consulting Services (54162), Architectural, Engineering, and Related Services (5413)

SIC

Services-Engineering Services (8711)

akta.pro primary industry

Water, Wastewater & Hydraulics Engineering Consulting (BPAHAIAD)

akta.pro secondary industries

Water, Wastewater & Stormwater Compliance (BPAHAJAJ), Water & Wastewater Infrastructure Asset Management (EUAEAMAH), Water & Wastewater Compliance (NPDES/Stormwater, Pretreatment, Drinking Water/SDWA) (EUAHABAB), Instrumentation, Controls & Automation Engineering Consulting (BPAHAIAM), Water Resources, WASH & Integrated Water Management (BPADALAH)

Keywords

• Water infrastructure consulting
• Sewerage system design
• Disaster prevention consulting
• ODA water projects
• Environmental engineering services

Headquarters

HQ city

Tokyo

HQ country

Japan

HQ region

Asia

Offices43 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Technology or R&D, Marketing or Sales

Revenue model

1. コンサルティングサービス（調査・計画・設計・工事監理）: 上下水道・環境関連分野における調査、計画、設計、工事監理等のコンサルティングサービス提供。国や自治体が発注者となる公共事業が主な収益源。
2. 海外ODA事業: JICA等の国際協力機関からの受注により、開発途上国の水環境整備プロジェクト（調査・計画・設計・技術移転等）を実施。
3. CDP水セキュリティ評価支援: 企業・自治体のCDP（気候変動・水セキュリティ・フォレスト）への回答支援やスコアリングパートナーサービス提供。

Pricing tiers

Go-to-market motion3 records

Distribution channels2 records

Marketing channels5 records

Core offering

Tokyo Engineering Consultants (株式会社東京設計事務所, TEC Group) is a water infrastructure consulting firm providing survey, planning, design, construction supervision, and asset management services for water supply, sewerage, and environmental infrastructure. The company primarily serves Japanese national and municipal governments through public works contracts, and delivers ODA-funded water infrastructure projects in 60+ developing countries via JICA. It also offers disaster prevention/mitigation consulting, PPP/PFI advisory, digital transformation (DX) services, and CDP water security scoring support.

Product overview

Tokyo Engineering Consultants (株式会社東京設計事務所, TECグループ) is a water infrastructure consulting firm founded in 1959, specializing in water supply, sewer, and environmental engineering. The company operates a unified consulting services portfolio organized around 8 core divisions: 水道 (Water Supply), 下水道 (Sewer), 官民連携 (PPP/PFI Partnership), 防災・減災 (Disaster Prevention), 環境・エネルギー (Environment & Energy), 情報・DX (Information & Digital Transformation), CDP・水セキュリティプログラム (CDP Water Security Program), and グローバル事業部 (Global Business). These divisions share a common technical foundation — civil, architectural, mechanical, and electrical engineering applied to water infrastructure — and often overlap in project delivery (e.g., DX tools like AI pipe diagnostics and 3D fluid analysis are applied across Water Supply and Sewer projects; disaster prevention expertise cuts across all sectors). The company also provides specialized digital services including drone-based pipe inspection, AI-driven asset management, and its proprietary 気象避難支援システム for flood risk alerting, alongside CDP scoring advisory services. The Global Business division operates internationally through ODA/JICA projects across 60+ countries.

Differentiator

Problem solved

Functional benefit

Products and services

• Water Supply Consulting (水道) Survey, planning, design, and construction supervision consulting for water supply and industrial waterworks facilities, including water safety planning, water utility vision/strategy support, and water supply wide-area cooperation.
• Sewerage Consulting (下水道) Survey, planning, design, stock management, repair/rehabilitation, seismic retrofit, and disaster response consulting for sewerage facilities. Includes inundation analysis simulation, pipe implementation design, and construction supervision.
• PPP/PFI Partnership Support (官民連携)

Quantifiable outcome

• 世界60カ国以上での水環境整備プロジェクト実績（300件以上）
• +3 more outcomes

Named customers6 records

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

AI capability7 records

Feature4 records

Partnerships

Eight partnerships are on record, tiered core and minor.

• 日本下水道新技術機構coreStrategic or Co-development Partner · 30 April 2025下水道分野の官民連携事業における統括的な管理業務のあり方に関する共同研究。其他合作企业还包括インフロニア・ホールディングス株式会社、株式会社ウォーターエージェンシー、株式会社NJS、株式会社奥村組、オリジナル設計株式会社、鹿島環境エンジニアリング株式会社等。
• 日本下水道新技術機構coreStrategic or Co-development Partner · 1 October 2024流出解析モデル利活用マニュアル改訂に関する共同研究。其他合作企业包括株式会社NJS、オリジナル設計株式会社、株式会社極東技工コンサルタント、株式会社三水コンサルタント等。
• 公益社団法人日本下水道新技術機構coreStrategic or Co-development Partner · 1 June 2023蓄電池等を用いた樋門の電動化・遠隔化技術に関する共同研究。其他合作企业包括荏原実業株式会社、大同機工株式会社。2025年11月に技术资料として発刊。
• 入間市minorStrategic or Co-development Partner · 24 May 2023水災害に強い防災まちづくりに向けた共同研究。其他合作企业包括株式会社スカイデータ、シスメット株式会社。气象避难支援システムを开发。
• 湖西市minorStrategic or Co-development Partner · 1 April 2023弾力的な水道料金における使用水量等への影響に関する共同研究。合作单位包括豊橋技術科学大学、中部電力株式会社。
• 湖西市minorStrategic or Co-development Partner · 5 November 2020水道スマートメーター等のデータ利活用による共同研究。合作单位包括豊橋技術科学大学、中部電力株式会社。スマートメーターを活用した水需要・管路流量の変化の可視化を推進。
• ウガンダ上下水道公社coreStrategic or Co-development Partner南スーダンの公社職員を受け入れた第三国研修の実施。ウガンダ上下水道公社（アフリカで最も成功した水道事業体の一つ）との協力により、南スーダン公社職員への技術移転を実現。
• ウズベキスタンminorStrategic or Co-development PartnerTECグループによるウクライナ大使館への支援金の寄付を通じて、国际貢献活动を実施。

Scale indicators8 records

Recent moves11 records

Expansion highlights6 records

Direct peers

• CTI Engineering Co., Ltd. Domestic infrastructure consultancy active in water supply, sewerage, and river/coastal engineering; competes with TEC on Japanese municipal tenders and increasingly on climate-adaptation projects.
• Pacific Consultants Co., Ltd. Large Japanese infrastructure consultancy with a substantial water and environment practice; competes for public-works tenders and ODA water projects alongside TEC, with broader geographic and sector coverage.
• NJS Co., Ltd. Japan's largest pure-play water and sewerage engineering consultancy; competes head-to-head with TEC on municipal water supply, sewer, and overseas ODA water projects, making it the most direct comparable peer.
• Nippon Koei Co., Ltd. Japan's oldest engineering consultancy with deep international ODA experience and a water/environment segment; overlaps with TEC on developing-country water infrastructure and disaster-response consulting.
• Yachiyo Engineering Co., Ltd. Major Japanese engineering consultancy with a strong water and environmental portfolio; competes with TEC on JICA ODA projects, water supply/sewerage design, and disaster-prevention consulting.
• Suiko Research Co., Ltd. Specialist Japanese water and environmental engineering consultancy; a closer niche competitor in sewerage planning and water-quality consulting than the larger diversified firms.
• Oriental Consultants Co., Ltd. Joint-research partner on water and sewer projects with TEC and active in the same JICA ODA ecosystem; comparable as a mid-sized Japanese engineering consultancy with water as a core vertical.
• INA Corporation: Water-focused Japanese engineering firm with a long track record in dam, water supply, and sewer consulting; overlaps with TEC's domestic utility client base and ODA project portfolio.

Broad incumbents

• AECOM (Japan operations): Global infrastructure consulting giant with significant water practice; competes with TEC on large-scale ODA-funded and private-sector water projects in Asia, especially where bundled engineering services are required.
• Jacobs Solutions Inc. Global engineering firm (including legacy CH2M water business) with deep international water credentials; competes with TEC for large-scale overseas water projects and brings global benchmarking pressure to Japanese specialists.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat6 records

Key risks7 records

Key highlights7 records

Customer concentration

• Xtwitter.com/tokyoecons
• YouTubeyoutube.com/channel/UC5oL
• LinkedInlinkedin.com/company/tokyo-engineering-consultants

Compliance4 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles7 records

Subsidiaries3 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about TOKYO ENGINEERING CONSULTANTS