Etymology and distribution of 黄梅.

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

Gunma-ken . Gunma-ken Tomioka-shi In the Shinto farmland he tells that he is the descendant of Yukimura Sanada who is a warrior of the Azuchi-Momoyama period and the Edo period. 真田 Sanada reference.