Like a Dragon: Ishin is one of several spin-offs in the Yakuza (or Like a Dragon) series.
Like a Dragon: Ishin! is available for PlayStation 5, PlayStation 4, PC Xbox One, and Xbox Series X.
Like a Dragon: Ishin has an incredible amount of external information available in an in-game glossary players can pull up during conversations with characters.
As for tone, we understood Ishin as an adaptation of Bakumatsu-era history made to fit the Like a Dragon mold.