Thread:Vengatio1/@comment-31524231-20190707203627/@comment-31524231-20191011205407

My suggestions:

​​​​*Akagawa/赤川 (Akita)
 * Aoyama/青山 (Aomori)
 * Iwagaki/岩垣 (Iwate)
 * Yamahara/山原 (Yamagata)