Usui 【臼井】6 The Japanese surnames etymology dictionary.
① Topography . In Hyougo - ken Amagasaki - shi telling that Mr. Miyazaki was given by being helped by the seaside during flood damage in the late Edo period. 宮崎 reference. Nagasaki-ken Minamimatsuura-gun Shinkamigotou-chou There is distribution in Sonegou. The land faces the East China Sea. Kouchi-ken Hata-gun Ootsuki-chou There is a distribution in Oashiura . The land faces the Pacific Ocean. Aichi-ken Nagoya-shi Honmaru Honmaru was in the Edo period in the Owarii clan in the Clan office. The same clan says that he changed the name from Shimada surname in 1820 (3rd year of government). 嶋田 reference.