Can you - in broad terms - explain why that is? Will Y6 focus on a core conflict set-up at the beginning and 2-5 were more fleshin out the world and giving you larger "side"-objectives, or?
All Yakuza games come with a meaty recap of previous games, and even then, the stories, even as intertwined as older characters are, are relatively stand-alone stories.
Granted, a lot of them are stories that come about due to events that occured from previous games leading up, but you don't need to know that Character X killed Character Y in Game 27 which led to Brother of Character Y seeking revenge, etc etc.
The games expect you to understand that there is already an established relationship between characters, but not necessarily that you need to intimately remember the nuances of the relationship that is built from past games.
Having seen the bits of Yakuza 6's marketing material, I'd say the single most critical 'baggage' that the game expects you to have an attachment to is the relationship between Kiryu and Haruka, which was established in Yakuza 1 and expanded upon throughout 2-5.
Personally, I would think that a bare minimum of one more game would be a good additional experience between Yakuza Kiwami and Y6, ( just to get one game with Kiryu/Haruka's relationship explored ) but it's fine to jump from 1->6 as well. Just assume there's like a 8-10 year timeskip or something.
