A movie called Ryu ga Gotoku was based on the game, following the storyline pretty close with all the locations, characters, and even the fighting effects from the game.
[JP] "Ryu ga Gotoku [Model SLPM-74234]" (2006)
[JP] "Ryu ga Gotoku [Model SLPM-74253]" (2007)
[KO] "Ryu ga Gotoku [Model SLKA-25342]"
[US] "Yakuza [Model SLUS-21348]
[EU] "Yakuza [Model SLES-54171]