Kanto / Tohoku Division
DHQ
5 Yoriai-cho, Takasaki-shi, Gunma 370-0822
Tel 027-323-1337 Fax 027-323-1334
Tokyo / Tokaido Division
DHQ
2-17 Kanda-Jimbocho, Chiyoda-ku, Tokyo 101-0051
Tel 03-3263-0849 Fax 03-3263-0935
Nishinihon Division
DHQ
3-6-20 Tenjinbashi, Kita-ku, Osaka-shi, Osaka 530-0041
Tel 06-6351-0084 Fax 06-6354-5566