Etymology and distribution of 土居河.

Doikawa 【土居河】^{レベル3
About 50}  The Japanese surnames etymology dictionary.

Yamanashi-ken , Toukyou-to , Kanagawa-ken . A variant of 羽中田 . The old pronunciation in estimation is Hanakada. Yamanashi-ken Koufu-shi Marunouchi was a Kofu clan of the Clan office, Toukyou-to Chiyoda-ku Chiyoda was in the Edo era in the Edo era of the government's Edo shogunate. 羽中田 Hachuuda reference.