Etymology and distribution of 友嶋.

Tomoshima 【友嶋】^{レベル1
Very rare}  The Japanese surnames etymology dictionary.

Ibaraki-ken , Okayama-ken , Chiba-ken . Distribution including Haritani as well.

① 榛谷 's variant. In Toukyou-to , Saitama-ken , Harya is mainstream. 榛谷 Hangai reference.

② Okayama-ken Ibara-shi Birthplace originated from Zhiya (Mr. Haritani) of Misato's Miyama town. Last name is Haritani.