While the protagonist of Yakuza: Like a Dragon, Ichiban Kasuga, is commonly stated to have debuted in the 2018 game Ryu Ga Gotoku Online, he actually was first revealed in a trailer for the game Fist of the North Star: Lost Paradise, which is considered a spin-off of the Yakuza/Like a Dragon franchise. This trailer aired almost a year before Ryu Ga Gotoku Online and is notable as Ichiban does not appear in Fist of the North Star: Lost Paradise.

The English-language Launch Edition of Fist of the North Star: Lost Paradise came packaged with a sticker set with two of the game’s death phrases on them. The first says “Hidebu!” and the second one says “Shit Balls!”, which could come off as odd for someone without context of the game.