Head Office and Branch Offices
| Name of Business Place | Address |
|---|---|
| Head Office |
Toranomon Hills Business Tower 17-1, Toranomon 1-chome, Minato-ku, Tokyo, 105-6407 Japan |
| North Japan Regional Headquarters |
SS30 Hotel-to B1, 6-1, Chuo 4-chome, Aoba-ku, Sendai, 980-6090 Japan |
| Sapporo Branch |
20 2-chome, Kita 7-jo Nishi, Kita-ku, Sapporo, 060-8575 Japan |
| Kanto Civil Engineering Regional Headquarters |
1-18, Toranomon 1-chome, Minato-ku, Tokyo, 105-0001 Japan |
| Hokuriku Branch |
16-8, Kamitokorokami 1-chome, Chuo-ku, Niigata,950-0992 Japan |
| Kanto Architectural Regional Headquarters |
2-1, Toranomon 2-chome, Minato-ku, Tokyo, 105-0001 Japan |
| Chubu Regional Headquarters |
27-14, Izumi 2-chome, Higashi-ku, Nagoya, 461-8558 Japan |
| West Japan Regional Headquarters |
4-7, Tsurigane-cho 2-chome, Chuo-ku, Osaka, 540-8515 Japan |
| Chugoku Branch |
2-28, Kokutaijimachi 2-chome, Naka-ku, Hiroshima, 730-8589 Japan |
| Shikoku Branch |
8-11, Ban-cho 3-chome, Takamatsu, 760-8503 Japan |
| Kyushu Regional Headquarters |
14-5, Yakuin 1-chome, Chuo-ku, Fukuoka, 810-0022 Japan |
| Okinawa Branch |
22-3,1-chome,Nishi,Naha,900-0036 Japan |
| The Technical Research Institute Head Office |
Sumitomo Real Estate Toranomon Tower 2-1, Toranomon 2-chome, Minato-ku, Tokyo, 105-0001 Japan |
| Aikawa Technical Research Institute |
4054, Nakatsu, Aikawa-machi, Aiko-gun, Kanagawa, 243-0303 Japan |
| Hiratsuka Machinery Works |
1-1,Ichinomiya, Samukawa-machi 6-chome, Koza-gun, Kanagawa, 253-0111 Japan |
- Head Office and Branch Offices
- Overseas Office
- Major Group Companies