Etymology and distribution of 関黒.

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

Oosaka-fu , Hyougo-ken , Iwate-ken Oushuu-shi . Korean type . Originated in the city of Gyeongju (aka Tsukishiro (Walson)) in the Republic of Korea. Tsukishiro was also nicknamed "Half Moon Castle (Panwolson)", there was a royal palace in Shilla. Iwate-ken Oushuu-shi (formerly Mizusawa city) There is a record of naturalization on February 27, 1956. The real name is Li. 李 Ri reference. Oosaka-fu Ikeda-shi has a record of naturalization on March 18, 1966. The real name is Park. 朴 Boku reference. There is Choi as well. 崔 Sai reference.