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Riichi Mamiya (間宮 利一 (まみや りいち) Mamiya Ri'ichi) is a mystery writer and a suspect in Ayase Serial Murder Case.
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Etymology[]
- The name Riichi means "advantage/benefit" (利) (ri) and "one/first" (一) (ichi).
- Riichi's surname Mamiya means "apartment/room/chamber" (間) (ma) and "palace" (宮) (miya).