Ariga

有賀 is a Japanese surname, read as either Ariga or Aruga. Notable people with the surname include:


 * Akiko Aruga (有賀 秋子), Japanese speed skater
 * Katsuhiko Ariga (有賀 克彦), Japanese chemist
 * Kōsaku Aruga (有賀 幸作), or less often by the alternate reading Kosaku Ariga, captain in the Imperial Japanese Navy
 * Nagao Ariga (有賀 長雄), or Nagao Aruga, Japanese jurist and historian
 * Nobuo Ariga (有賀 啓雄), also known as Hiroo Ariga (有賀 啓夫), Japanese singer-songwriter, bassist, arranger and record producer