"Reiwa Edition Modern Mahjong Technology Theory" Makoto Fukuchi / Nemata Price: ¥1980 "Anyone Can Do It! The Theorem of Mahjong Calling and Reading" Yuya Yamamoto Price: ¥1600 "The Essence of Defense in Mahjong by Tenhou-i (Top Player) Oniuchi" Announcement Price: ¥1680 "The Mechanism of Mahjong by Tenhou-i (Top Player) Oniuchi" Announcement Price: ¥1540 I purchased these books new at a bookstore, but they have been stored on the bookshelf without being read, so I have judged them as "new, unused." #Mahjong #Nemata #Announcement #YuyaYamamoto #Tenhou"