From GamesReviews:”Like a Dragon (formerly known as Yakuza) can be a tough series to get into, with many installments in the series it can be confusing on where the best place is to jump in. It also can be a little too off the wall for some people, with the random karaoke breaks and off the wall narratives. Like a Dragon Ishin! However, is a very different kind of game, while yes it has the same characters known throughout the series, they are more presented like actors playing a role in a historical tale as the same voice actors and visuals are used but they are calling them different names.”
Source: N4G PC Like a Dragon Ishin! Review – GamesReviews