Aihara (written: 相原 or 粟飯原) is a Japanese surname. Notable people with the surname include:
, Japanese manga artist , Japanese politician , Japanese manga artist , Japanese gymnast , Japanese footballer Yusuke Aihara (born 1994), Japanese professional vert skater , Japanese gymnast
Fictional characters Aihara is used as an alias for Shuichi Aizawa in Death Note Kotoko Aihara, the female protagonist in Itazura na Kiss Aihara Mei and Aihara Yuzu in Citrus (manga) , a character in anime and manga series Haikyū!!