Surname
Koseki
Koseki (小関) is a Japanese surname. Its kanji mean small + barrier, and Wikidata lists 14 notable people with this family name.
こ · せ · き · こせき
What Koseki means
小
small
関
barrier, gate
Where the name comes from
The kanji of Koseki mean small + barrier. Many surnames like it began as descriptions of a family's land, trade or position before surnames were required for every household in 1875.