Nakui 【名久井】4 The Japanese surnames etymology dictionary.
① Korea type . Terrain . Added "river" to Zhang. It was Aichi-ken Toyohashi-shi and was named after the name in 1957. The real name is Zhang. There is a record of naturalization on Fukushima-ken Kitakata-shi (formerly Yama-gun Hot Saladon village) on December 22, 1965. The real name is Zhang. 張 reference.