Koubu 【講夫】2 The Japanese surnames etymology dictionary.
Ishikawa-ken . Originated in the Hokuriku region (formerly Koshigaya). In the Asuka period there is a place name recorded with the notation "Takashi". "Yue" used. Ishikawa-ken Nanao-shi Distributed in Yamato-cho. Ishikawa-ken Northern area (formerly Noto County) is a place name with a record since the Nara period. There is an example using Noto's "Noh".