Setoguchi

Setoguchi is a Japanese surname. It is a relatively common surname, particularly found in the southern regions of Japan, specifically Kyushu. The name likely derives from a geographic location, possibly referring to a mouth (口, guchi) of a narrow strait or inlet (seto, 瀬戸). The kanji 瀬 (se) implies a shallow current, rapids, or a narrow waterway. 口 (guchi) means mouth, entrance, or opening. Thus, "Setoguchi" can be interpreted as "entrance to the straits" or "mouth of the narrows".