Koyanagi 【小柳】6 The Japanese surnames etymology dictionary.
① things . From the cherry tree. Okayama-ken Okayama-shi Tells Kawaguchi in Kita Ward that Gunma-ken came and came through Shimane-ken Hamada-shi . From the Sakuragi gate in the gate division system that was in the Edo period. An example of the location of the gate. Kagoshima-ken Minamisatsuma-shi Kinpimachi Takahashi, Kagoshima-ken Aira-shi Shimomu village of Gamo-cho.
④ Kumamoto-ken Kumamoto-shi Birth of Sakuragi, eastern ward. The place name that was established in 1970 from the small cherry tree. The old name of the place name was also written as "Sakurano tree" at "Sakuragi Township".