Etymology and distribution of 照井.

Terui 【照井】^{レベル5
About 18,500}  The Japanese surnames etymology dictionary.

Ishikawa-ken , Toyama-ken . Ishikawa-ken Northern area (formerly Noto Country) is a place name with a record since the Nara era. There is an example using Noto's "Noh". Ishikawa-ken Kanazawa-shi Marunouchi was in the Edo era at the Kaga clan in the Clan office.

※ Goguryeo system . There is a record in 724 (the first year of Kamikura). Location unknown.