>>713365312>into a new continuity like Judgement?Judgment is the same continuity. The exact same one. Same deal with the two Black Panther games, Kenzan, and Ishin. JE is a sequel to 6, 7 is a sequel to JE, LJ is a sequel to 7 and even requires it to have happened for its story to work, and 8 is a sequel to LJ and 7G.
Dead Souls is the only game in a different continuity. I assume you mean a different story in the same continuity separated from the story of Kiryu.
7, 7G, 8, and 8G are all still mainline games in Japan, the name change only affected the western market and there is no distinction between "Yakuza" and "Like a Dragon" games because they're all "Like a Dragon" games in Japan. To Japan the only difference is 7 and 8 are JRPG games and nothing else, there is otherwise no difference in the games.
I assume they didn't want to go whole hog because the shift to JRPG was already extremely controversial and a gamble, and they had Judgment games being made on top of it until the whole drama with Johnny's happened during LJ so it wouldn't make sense to commit like that.