Head Office
Omori Bellport D Bldg., 26-3, Minami Oi 6-chome,
Shinagawa-ku, Tokyo, 140-0013 Japan
Tel: +81-3-6404-1221
Carrier Network Division
216 Totsuka-cho, Totsuka-ku, Yokohama-shi, 244-8567 Japan
Tel: +81-45-881-1221
Enterprise Network Division
94, Funabamukai, Koriyama-shi, Fukushima, 963-8510 Japan
Tel: +81-24-944-1221
Branches
Hokkaido branch
Sapporo Mitsui Bldg., 4-1, Kitanijyo Nish, Chuo-ku, Sapporo-shi, 060-0002 Japan
Tohoku branch
Kowa Bldg., 4-1, Ichibancho 2-chome, Aoba-ku, Sendai-shi, 980-8531 Japan
Chubu branch
Otsu Denki Bldg., 17-12, Sakae 3-chome, Naka-ku Nagoya-shi, 460-8435 Japan
Hokuriku branch
Porute Kanazawa Bldg., 15-1, Honmachi 2-chome, Kanazawa-shi, 920-0853 Japan
Kansai branch
Nihon-seimei Yodoyabashi Bldg., 5-29, Kitahama 3-chome, Chuo-ku, Osaka-shi, 541-0041 Japan
Chugoku branch
Hiroshima Fukuro-machi Bldg., 5-25, Fukuro-machi, Naka-ku, Hiroshima-shi, 730-0036 Japan
Shikoku branch
Chuocho Bldg., 5-31, Chuocho, Takamatsu-shi, 760-0007 Japan
Kyushu branch
Hitachi Kyushu Bldg., 2-1-1, Hyakumichihama, Hayara-ku, Fukuoka-shi, 814-8577 Japan