>>2815The only two other FKMT works I've read besides Kaiji and Akagi (I haven't finished Akagi btw) are Nikaidou's Hell Golf and Jyoukyou Seikatsuroku Ichijou (not directly written by Fukumoto tho). The Ichijou spin off is really fun, it's more silly than anything but at the end it gets very angsty with the relationship of Ichijou and Murakami. Nikaidou's Hell Golf is not at all what I expected, but it's been a pleasant surprise with how depressing yet hopeful the story is, it's still not finished tho and translations are coming out.
I wanna read all of his works tho, I've heard Gin to Kin is very good and essentially just canon FKMT BL kek, and idk much about Pen-chan so I can't comment on it other than is short so you could probably read it in a day. Other two that I've heard are very good are Buraiden Gai and Tobaku Haoden Zero, the latter talks about gambling but the former is very action heavy so very different to everything else the mangaka has done.
So I guess overall I think it depends on what you want! You wanna continue with gambling stories? Try out Zero, maybe stay with mahjong? Try out Pen-chan, something very very different? Try out Gai, wanna read a BL about the stock market? Gin to Kin it is.