Company Information

Corporate Data

NAME Nikken Sekkei Ltd.
REGISTERED ADDRESS 2-18-3 Iidabashi, Chiyoda-ku, Tokyo
PRESIDENT AND CEO Atsushi Omatsu
FOUNDED/ESTABLISHED　 Established June 1, 1900 (Meiji 33) July 1, 1950 (Showa 25)
CAPITAL 460 million yen
URL https://www.nikken.jp
BUSINESS DETAILS Architectural planning, design and supervision, urban and regional planning, and related research and planning consulting services.
NUMBER OF PERSONNEL Executives and staff: 2,831 (3,455)
Professional engineers 230 people (266 people)
Japan Registered 1st Class Architects:  1,111 (1,326)
140 second-class architects (160)
(Figures in parentheses represent the entire Nikken Group as of April 1, 2026)

Nikken Sekkei in Numbers

"Numbers"Through this, we will introduce Nikken Sekkei’s business scale, expertise, and the breadth of our collaborative efforts with society.
Nikken Sekkei in Numbers

Location

Domestic

Tokyo Office (Head Office)

2-18-3 Iidabashi, Chiyoda-ku, Tokyo 102-8117
TEL: 03-5226-3030

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Tokyo Takebashi Office

Palaceside Building, 5th & 8th Floors, 1-1-1 Hitotsubashi, Chiyoda-ku, Tokyo 100-0003, Japan

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Meiji Yasuda Life Insurance Iidabashi Building, Tokyo

2-7-5 Iidabashi, Chiyoda-ku, Tokyo 102-0072

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Hokkaido Office

14-3-6 Kita 2-jo Nishi, Chuo-ku, Sapporo 060-0002
TEL: +81-11-241-9537

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Nagoya Office

4-15-32 Sakae, Naka-ku, Nagoya City, Aichi Prefecture 460-0008
TEL: +81-52-261-6131

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Osaka Office

5th-8th Floor, Ginzen Bingomachi Building, 3-6-5 Kawaramachi, Chuo-ku, Osaka City, Osaka 541-8528, Japan
TEL: +81-6-6203-2361

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Kyushu Office

1-12-14 Tenjin, Chuo-ku, Fukuoka 810-0001
TEL: +81-92-751-6533

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Tohoku Branch

4-10-3 Chuo, Aoba-ku, Sendai 980-0021
TEL: +81-22-221-4466

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branch office

Shizuoka / Nagano / Hokuriku (Toyama) / Keiji (Kyoto) / Chugoku (Hiroshima) / Kumamoto / Okinawa (Naha)

Overseas Offices

Shanghai

6th Floor, Mangoo Hub Tower B, 7 Long Ai Road, Xu Hui District, Shanghai 200232, China
TEL: +86-21-5037-2265

Dalian

5th Floor, Shenmao Building, 147 Zhongshan Road, Xigang District, Dalian 116011, China
TEL: +86-411-8364-8355

Beijing

Room 1210, China World Tower 1, No.1 Jian Guo Men Wai Ave., Chaoyang, Beijing 100004, China
TEL: +86-10-6505-4606

Shenzhen

Room 3207, 32th Floor, Shenzhen Metro Property Development Building, 6011-8 Shennan Avenue, Futian District, Shenzhen 518042, China
TEL: +86-755-8276-1105

Chengdu

158-2-1-23-2302, Tianfu 4th St, Gaoxin District, Chengdu City, Sichuan Pilot Free Trade Zone, China
TEL: +86-28-8658-5530

Seoul

2017, 92, Saemunan-ro, Jongno-gu, Seoul 03186, Korea
TEL: +822-568-4090
 

Hanoi

#1706-A, 17th Floor, GELEX Tower, 52 Le Dai Hanh Street, Hai Ba Trung District, Hanoi, Vietnam
TEL: +84-24-3715-3698

Ho Chi Minh

7F, Daikin Air Tower, 10 Cong Truong Quoc Te, Xuan Hoa Ward, Ho Chi Minh City, Vietnam
TEL: +84-28-3925-2570

Bangkok

11/1 AIA Sathorn Tower, 7th Floor, Room No.705 - 706 South Sathorn Road, Yannawa, Sathorn, Bangkok 10120 Thailand
TEL: +66-2-285-1233

Singapore (Liaison Office)

182 Cecil Street, #17 Frasers Tower, Singapore 069547
TEL: +65-6622-5330

Dubai

Dubai Branch
Office # 2903, The Burj Al Salam Tower, Trade Center First, Sheikh Zayed Road, Dubai
P.O.Box 27120, United Arab Emirates
FZ-LLC
Office A208 & A209, 2nd Floor, Building 6, Dubai Design District, Dubai
P.O.Box 27120, United Arab Emirates
TEL: +971-4-3434269

Corporate Structure

As of January 1, 2026

Board Member

Member of the Board, Senior Executive Officer

Tadao Kamei

Chairman of the Board of Directors

Atsushi Omatsu

President and CEO

Ken Kodama

Executive Vice President,  Representative Member of the Board

Kiyoyoshi Okumori

Member of the Board, Senior Executive Officer

Taro Katsuyama

Member of the Board, Senior Executive Officer

Kitaro Mizuide

Member of the Board, Senior Executive Officer

Yuriko Sawatani

Member of the Board (Outside Director)

Takeshi Saraoka

Member of the Board (Outside Director)

Kenichi Nagataki

Member of the Board (Board of Auditors)

Kei Sato

Member of the Board (Board of Auditors)

Hiroshi Nishimura

Member of the Board (Board of Auditors)

Executive Officer

Atsushi Omatsu

President and CEO

Ken Kodama

Executive Vice President, Representative Member of the Board
Head of Architectural Design Department

Kiyoyoshi Okumori

Member of the Board, Senior Executive Officer
Head of Urban and Civil Project Department
Principal, Innovation Design Center

Taro Katsuyama

Member of the Board, Senior Executive Officer
Representative of Osaka Office

Kitaro Mizuide

Member of the Board, Senior Executive Officer
Head of Engineering Department
Principal, Engineering Consulting Group

Wataru Tanaka

Senior Executive Officer
Head of Global Business Department / Principal, Global Business Development Group / Principal, International Office Management Group

Tomoyuki Ashida

Senior Executive Officer
Head of Design & Technical Department / Principal, Quality Management Group

Ken Sato

Senior Executive Officer
Representative of Tokyo Office / Head of Client Relations Department

Kenichiro Nakatani

Senior Executive Officer
Head of Project Development Department / Principal, Project Management Group

Akihiro Mine

Senior Executive Officer
Head of Corporate Department

Junichi Nabeshima

Executive Officer
Head of Construction Administration Department / Principal, Construction Administration Group

Zhongxiao Lu

Executive Officer
Chief Executive Officer and General Manager, Nikken Sekkei Shanghai

Fadi Jabri

Executive Officer
CEO, Nikken Sekkei Dubai (NIKKEN SEKKEI FZ-LLC)

Hideki Yamamoto

Executive Officer
Representative of Nagoya Office

Tatsuya Murai

Executive Officer
Principal, Architectural Design Group, Architectural Design Department

Shunichi Sugiyama

Executive Officer
Principal, Architectural Design Group, Architectural Design Department

Shigeki Sugiura

Executive Officer
Principal, Architectural Design Group, Architectural Design Department

Taro Shimada

Executive Officer
Principal, Cost Management Group, Design & Technical Department

Yuko Kimura

Executive Officer
Principal, Urban Development Planning Group, Urban and Civil Project Department

Kazutaka Horii

Executive Officer
Principal, Risk Management Center

Ichiro Mukai

Executive Officer
Principal, Architectural Design Group, Architectural Design Department

Kyosuke Takano

Executive Officer
Principal, Sustainable Engineering Group, Engineering Department

Takako Honda

Executive Officer
Principal, Architectural Design Group, Architectural Design Department

Tetsuo Tsuchiya

Executive Officer
Principal, Architectural Design Group, Architectural Design Department

Seiji Nishiyama

Executive Officer
Principal, Civil Engineering Group, Urban and Civil Project Department

Tetsuto Furuhata

Executive Officer
Principal, Corporate Planning Center  / Principal, Corporate Communication Center

Masafumi Sekine

Executive Officer
Representative, DX・GX Center / Chief Information Officer

Kainan Fu

Executive Officer
Chief Executive Officer, Nikken Sekkei Dalian / Chief Executive Officer and General Manager, Nikken Sekkei Chengdu

Ryuichi Kizumi

Executive Officer
Principal, Urban and Landscape Design Group, Urban and Civil Project Department

Motohiko Hirose

Executive Officer
Representative of Kyushu Office

Yasutomo Matsui

Executive Officer
Representative of Hokkaido Office

Masao Nishioka

Executive Officer
Principal, Space Design Group, Architectural Design Department

Yumiko Miyasaka

Executive Officer
Principal, Mechanical Engineering Group, Engineering Department

Hiroyuki Usami

Executive Officer
Principal, Housing System Group, Architectural Design Department

Kazuyuki Yonemori

Executive Officer
Principal, Client Relations Management Group, Client Relations Department

Koko Nakamura

Executive Officer
Principal, Architectural Design Group, Architectural Design Department

Taro Nakamoto

Executive Officer
Principal, Architectural Design Group, Architectural Design Department

Yoshihito Ikebe

Executive Officer
Principal, Financial Strategy Group, Corporate Department

Kei Kohinata

Executive Officer
Principal, Design Review Group, Design & Technical Department

Satoshi Osawa

Executive Officer
Principal, Architectural Design Group, Architectural Design Department

Masanori Tasaka

Executive Officer
Principal, Project Information Group, Design & Technical Department

Mikio Kiyoto

Executive Officer
President and CEO of Nikken Sekkei Construction Management
Principal, Commons Group, Project Development Department

Takatoshi Takatsu

Executive Officer
Principal, Infrastructure Development Group, Urban and Civil Project Department

Tatsuya Hatori

Executive Officer
Principal, Architectural Design Group, Architectural Design Department

Daiji Chikuba

Executive Officer
Principal, Architectural Design Group, Architectural Design Department

Mikiko Ikeda

Executive Officer
Principal, Corporate Group, Corporate Department

Shintaro Takayanagi

Executive Officer
Principal, Electrical Engineering Group, Engineering Department

Yoshiaki Komatsu

Executive Officer
Principal, Landscape Design Group, Urban and Civil Project Department

Daisuke Tsunoda

Executive Officer
Principal, Tech Design Group, Design & Technical Department

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