Etymology and distribution of 岩下.

Iwashita 【岩下】^{レベル6
About 37,900}  The Japanese surnames etymology dictionary.

Ishikawa-ken , Saitama-ken , Kanagawa-ken .

① Ishikawa-ken Nomi-shi Origin of Ushijima Town (formerly Ushijima Village). In the Heian era, a place name with a record as "Beef Shimamura". Ishikawa-ken Kanazawa-shi Marunouchi was in the Edo era at the Kaga clan in the Clan office.

② Saitama-ken Satte-shi (formerly known as Ushimura) is a place name with a record in the Edo period. Saitama-ken Hiki-gun Kawajima-machi Uesugi is based. Tell them that they are groundbreaking in the same place. It was in the Edo period in Kanagawa-ken Naka-gun Ooiso-machi .