Etymology and distribution of 窪畑.

Kubohata 【窪畑】^{レベル1
Very rare}  The Japanese surnames etymology dictionary.

Hyougo-ken Koube-shi . Thing . A variant of 昆布 . In Hyougo - ken Koube - shi telling that it was renamed at the time of the Meiji New surname from the Konbu family name that was called during the Edo period. 昆布 Konbu reference.