Sadayuki 【定行】4 The Japanese surnames etymology dictionary.
① Convention . Abbreviation for Tsuruta. Gunma-ken Oota-shi Tsuruta-do (Tsuruda) Tell the name of Tsuru-Iida's surname from the town that it changed the letter as Ikuta surname short for the Kamakura period. There is also a passage with Muromachi period. Good neighbor . Gunma-ken Oota-shi Nitta Koganei-cho is based. It is unknown whether Tsuruta field exists. 生田 reference.
② Hyougo-ken Koube-shi Birthplace of Ikuta Town in Chuo-ku Chuo. A place name with a record since the Nara period. Pronounce Ikuta as Shoda and tell her that it changed from 1573 to 1592 (Tensho year) to Shinoda surname. Toukyou-to Shinagawa-ku Higashi Gotanda, Gunma-ken Tatebayashi-shi There is a tradition in Sakae - cho. 生田 reference.
④ Topography . Kagoshima-ken 's Amami archipelago added a single "surname", "Tanaka". Estimated at the time of returning to Japan in 1953. Kagoshima-ken Ooshima-gun Tokunoshima-chou Distributed in Kameitsu. 正 reference.