Etymology and distribution of 逆水.

Sakamizu 【逆水】^{レベル2
About 20}  The Japanese surnames etymology dictionary.

Kyouto-fu Jouyou-shi . Terrain . "Island" is added to Kagoshima-ken 's Amami archipelago's first surname. In Hyougo-ken Koube-shi , between 1952 and 1959, renamed for reason that surname is confusing foreigner. 情 Sei reference.