Sekiguchi 【関口】6 The Japanese surnames etymology dictionary.
Ehime-ken Imabari-shi . Terrain . From the fields and recesses. Ehime-ken Imabari-shi Tell them that they were engaged in agriculture at night in Yoshimi-cho. Estimated in the Edo period. Ehime-ken Imabari-shi Totomachi was in the Edo period in the Imabari clan of the Clan Office. Ehime-ken Touon-shi Tabuchi (Tano Kubo) is a place name with a record since the Edo period. The place name was also written as "Tanonobu".