Aiba 【相羽】5 The Japanese surnames etymology dictionary.
Tokushima-ken , Chiba-ken , Kanagawa-ken . 相原 's variant. Toukyou-to Machida-shi Aihara-cho · Kanagawa-ken Sagamihara-shi Mihara tells that it was called Aihara at the end of Heian period. I tell Tokushima-ken that I came to Muromachi period. Tokushima-ken Tokushima-shi There is a passage that there was the name of "Awa Iihara" on the same place by offering millet and rice to Ichinomiya Shrine in Nishinobu - cho.