CTI Engineering Group Companies

Ever since the Construction Technology Institute, its predecessor, was founded in 1945, CTI Engineering Co., Ltd. has developed advanced technological capabilities as strengths to serve as Japan’s first construction consulting company. The company currently has over 1,400 professional engineers (assuming the double counting of engineers qualified in multiple fields) and has led the industry for many years as a multi-disciplinary consulting engineer that is one of Japan’s market leaders in terms of sales.
The company aims to develop new technologies intended to offer solutions to social issues and expand its role in the international community while also pursuing organization-wide initiatives to train human resources in charge of such tasks, thereby contributing to the sustainable development of society.

Photo: Tamarai Dam Project (Taketa, Oita Prefecture)
Received an Asian Civil Engineering Coordinating Council (ACECC) Outstanding Civil Engineering Project Award

addr.	Nihombashi Hamacho F Tower 3-21-1 Nihombashi Hamacho, Chuo-ku, Tokyo 103-8430
tel.	+81-3-3668-0451
HP	https://www.ctie.co.jp/english/

CTI Engineering International Co., Ltd. is in charge of the CTI Engineering Group’s global business and primarily handles the development of overseas infrastructure and social environments in developing countries. This company believes sustainable development is only possible based on a holistic understanding of the problems and issues faced by a given site, as opposed to only a limited cross-sectional understanding of a project. The company provides a comprehensive service covering the entire project lifecycle, from start to finish by strengthening its soft-side capabilities in addition to its hard-side expertise—which encompasses resaerch, planning, design and construction supervision. Through these efforts, the company will continue to provide responsible support to improve the living environments of people all over the world and preserve the natural environment.

Photo: the Jatibarang Multipurpose Dam, which was completed during the Integrated Water Resources and Flood Management Project for Semarang City, Indonesia (height: 74 meters)

addr.	Nihombashi Hamacho F Tower 11fl. 3-21-1Nihombashi Hamacho, Chuo-ku, Tokyo 103-0007
tel.	+81-3-5695-0222
HP	https://www.ctii.co.jp/en

Waterman Group Plc is a multi-disciplinary consulting engineer that proposes sustainable solutions related to project conceptualization, planning, design, construction management, and maintenance management in the building structure, construction equipment, infrastructure, environment, and client support (seconding engineers to municipalities) fields. Ever since the company was founded in 1952, it has acted as a leading company in the UK, Ireland, and Australia in the engineering and environmental fields, providing a wide range of solutions that are innovative, sustainable, and economically feasible to government organizations, local governments, private companies, and other organizations.

Photo: National Manufacturing Institute Scotland

addr.	Pickfords Wharf Clink Street London SE1 9DG United Kingdom
tel.	+44-207-928-7888
HP	https://www.watermangroup.com

Ever since Japan Urban Engineering Co., Ltd. was first established as a foundation, it has been deeply involved in post-war reconstruction business and disaster recovery business. The company utilizes its many years of experience and extensive track record to work on a diverse range of flexible urban development projects through land development. The company helps to build fulfilling, pleasant communities to pave the way to a better future by engaging in private urban development business and real estate development, including not only residential and commercial development but also distribution around interchanges, etc., as well as providing active, wide-ranging support related to the promotion of business in public areas where development has long been on hold or has stagnated.

Photo: Land Readjustment of Peripheral Area of Goka Interchange in Goka, Ibaraki Prefecture Photo provided by: GLP Japan Inc., GLP Ken-O Goka

addr.	5-2-5 Higashi-Ueno, Taito-ku, Tokyo 110-0015
tel.	+81-3-5811-1140
HP	https://www.cticd.co.jp

Chi-ken Sogo Consultants Co., Ltd. possesses geological research technologies, ground analysis technologies, and planning and design technologies cultivated over the course of its 60-year history, and this eco-friendly company has earned the strong trust of its diverse customers. The company has also played a key role in increasing national resilience to help protect infrastructure and other important facilities from flood damage, increasingly frequent earthquakes, and other natural disasters caused by recent climate change, thereby contributing to efforts to ensure the safety and security of the people. In addition, the company also sincerely tackles internationally relevant resource, energy, and environmental issues and is involved in technological development in new fields that include geological disposal and the underground storage of carbon dioxide.

Photo: survey site on the Median Tectonic Line in Shikoku (aerial photo taken by a drone)

addr.	Nippori UC Bldg. 2-26-2 Nishi-Nippori, Arakawa-ku Tokyo 116-0013
tel.	+81-3-6311-5135
HP	http://www.chiso-con.co.jp

NISSOKEN ARCHITECTS & ENGINEERS Co., Ltd. was founded as an organizational design firm in 1963 and has been involved in architectural design and supervision both in Japan and abroad for over 60 years. The company’s basic philosophy is to leverage its wealth of experience designing public and private facilities to achieve dependable architecture that is both functional and highly reliable, and the company remains committed to this approach to this day. Based on this philosophy, the company hopes to continue creating high-quality architecture to help make both the businesses and lifestyles of its clients more stable and fulfilling.

Photo: complete renovation of Suginami City Central Library, 2022 JIA Architects of the Year Award, 2024 Good Design Award

addr.	Takara Bldg. 1-34-14 Hatagaya, Shibuya-ku, Tokyo 151-0072
tel.	＋81-3-5478-9700
HP	https://www.nissoken.co.jp

Environmental Research & Solutions Co., Ltd. utilizes its various qualification and certification registrations, including its environmental measurement certification, status as a Designated Investigation Institution under the Soil Contamination Countermeasures Act, MLAP certification, ISO/IEC 17025 certification, and water supply GLP qualifications, to harness its many years of experience and the latest knowledge to provide optimal solutions in line with the needs of its customers. Examples of the wide range of businesses the company is involved in include: research and measurement analysis aimed at maintaining living environments; environmental measurement of factories, plants, and other facilities; and environmental-impact research and analysis related to various business activities. Based on the technologies we have cultivated until now as well as the latest knowledge, we will continue to participate in the solutions for various issues related to conserving the environment as we contribute to the building of a more sustainable society.

Left photo:
a next-generation sequencer used to simultaneously analyze many DNA sequences
Right photo:
a digital PCR system used to achieve high-precision quantitative processing even in the case of a low concentration of target DNA

addr.	2-3-9 Hikaridai, Seikacho, Soraku-gun, Kyoto 619-0237
tel.	＋81-774-41-0200
HP	https://www.ctiers.co.jp

Ever since HIROKEN CONSULTANTS Co., LTD. was founded in 1966, the company has acted as a community-based multi-disciplinary consulting engineer involved in design, research, and measurement related to the development of social capital, and it has aimed to create outstanding social living spaces and offered consulting on many community-based projects, thereby playing a key role in contributing to society. We advocate for the achievement of human environments as a guideline for the future, and, in line with this keyword, we hope to always keep coexistence with nature in mind as we fully consider the environment during all our business pursuits.

Photo: surveying and design work at Saijo Central Park (Higashihiroshima, Hiroshima Prefecture)

addr.	1-7-3 Kawaguchicho, Fukuyama City, Hiroshima 720-0822
tel.	+81-84-954-2411
HP	https://hiroken-net.co.jp

CTI Ascend Co., Ltd. was established in January 2023 for the purpose of contributing to the regional reconstruction of Soma, Fukushima Prefecture, which was hit hard by the Great East Japan Earthquake, through sustainable business that includes local resource circulation and the utilization of unused facilities. The company has been cultivating grain corn since May 2023. The company later started using this as an ingredient to manufacture whiskey in July 2024 and plans to start selling whiskey in 2026.

Photo: a field where corn is grown and a whiskey still

addr.	74 Tamano, Soma-city, Fukushima 976-0154
tel.	+81- 244-34-2050
HP	https://tamano-ascend-distillery.jp

CTI REED Co., Ltd. conducts business activities in two cities: Saitama and Tsukuba. The company’s business includes environmental conservation, natural-disaster preparedness measures, and social infrastructure development, and, as a member of the CTI Engineering Group, the company contributes to the achievement of safe, secure communities as well as a more sustainable, affluent society.

Photo: experimental facility at Tsukuba Research Center

addr.	CTI Saitama Bldg. 1-14-6 Kamikizaki, Urawa-ku, Saitama City, Saitama 330-0071
tel.	+81-48-833-2049
HP	http://www.reed.ctie.co.jp

As a member of the CTI Engineering Group, CTI Wing Co., Ltd. has contributed to the development of community-based social capital. The company uses its strong cooperation with the CTI Engineering Group to train human resources and refine its technologies through study while conducting business in a wide range of fields, including research, planning, design, and maintenance management related to the development of social capital.

Left photo:
conceptual design to develop a rotary in front of Takatsuki Station (JR)
Right photo:
inspection of the National Route 2 Hamate Bypass bridge

addr.	Kitahama Nex Bldg. 4-33 Kitahamahigashi, Chuo -ku, Osaka City, Osaka 540-0031
tel.	+81-6-6755-4007
HP	https://www.ctie.co.jp/company/group/ctiwing/

To accurately respond to the diversifying needs of society, CTI Ground Planning Co., Ltd. works to refine the technologies it has cultivated until now while also actively utilizing digital-transformation technologies, including UAV, BIM/CIM, XR (AR/VR/MR), and AI, and new technologies aimed at promoting i-Construction to help resolve various social issues in the hope of contributing to community development and the formation of a more affluent society. Based on this philosophy, the company spends each day working to achieve a society that is safe, secure, and sustainable, especially in Kyushu and Okinawa, which are sites of frequent natural disasters, including wind and flood damage as well as earthquakes.

Left photo:
dam management utilizing digital-transformation technology
Right photo:
development of the smartphone app Bosai-Go! (Disaster Prevention Go!) to promote evacuation

addr.	CTI Fukuoka Bldg. 2-4-12 Daimyo, Chuo-ku, Fukuoka City, Fukuoka 810-0041
tel.	+81-92-737-5333
HP	https://www.ctie.co.jp/company/group/ctigp/

Ever since the company was founded over 50 years ago, Yuasa Consultant Co., Ltd. has earned the strong trust of its customers by accumulating skills and achievements through consulting on public and private works, mainly in Kyoto. The company contributes to the maintenance and development of community-based social infrastructure in the road and water supply fields in particular.

Photo: inverted triangular truss structure of the Daimon Bridge downstream aqueduct (Obata River)

addr.	195 Tawarayacho, Nakagyo-ku, Kyoto City, Kyoto 604-0952
tel.	+81-75-241-1825
HP	https://www.ctie.co.jp/company/group/yuasa/