Etymology and distribution of 洞城.

Toujou 【洞城】^{レベル2
About 30}  The Japanese surnames etymology dictionary.

Aichi-ken , Okayama-ken , Gifu-ken .

① Aichi-ken Nagoya-shi Born in Nakamura-ku Noritake. A place name with a record since the Muromachi period.

② Gifu-ken Gifu-shi birth of Norimitsu. A place name with a record since the Muromachi period. The place name was also written as "Nori bamboo".

※ There was a case where Oosaka-fu Oosaka-shi changed name from Noriyu surname in 1951.

Doujou 【洞城】^{レベル2
About 30}  The Japanese surnames etymology dictionary.

Okayama-ken Bizen-shi , Hokkaidou , Ooita-ken .

① Personal name . Okayama-ken Bizen-shi Yoshinaga Town Kusuna Shrine in Yoshinaga Town There is a record as a man's name in 1315 (Masakazu 4 years). It is distributed in the same place.

② Ooita-ken Hayami-gun Hiji-machi Originated from Law of Underworld in Kawasaki.