"Kachi Mahjong Nyumon Hosuke no Mahjong Rulebook: You Can Play Any Rule Immediately" (by Hōsuke Fukuchi, 6th and 7th Meijin / Nagaoka Shoten). First edition published December 5, 1985. The author, Hōsuke Fukuchi, is a manga artist and the 6th and 7th Meijin. He seems to believe in salon mahjong, enjoying the game with good friends. I checked Mercari, Amazon, Rakuten Ichiba, and auPay Market, and it appears the used market price is high, ranging from 29,000 to 31,000 yen. I honestly don't know the value myself, but if you understand its value, I am open to price negotiations. It is almost unused, with no noticeable scratches or stains. I bought it when I was learning mahjong, read it once, and have kept it carefully stored in my home library. #Mahjong #HōsukeFukuchi #KachiMahjongNyumon #Hosuke #NagaokaShoten"