Here are a few extra things that don't really fit anywhere else.

I had an issue where I would open Yakuza 6 and the game was a black screen after the SEGA logo. To fix it, what I had to do was disconnect my controller when opening the game, and then reconnecting it after the game was open and loaded in. Weird issue lol.

If you are on PC, it is really easy to mod pretty much all Yakuza games. I wanted to mod Judgement and Yakuza: Like a Dragon, and Lost Judgement because I use a Switch Pro Controller, and the input icons are swapped, which makes QTEs and even just navigating menus a little bit rough. You'll want to download Shin Ryu Mod Manager (github, Nexus Mods) and follow the instructions to get the mod manager.

For the Switch Pro Controller fix mods, I recommend the ones listed in this Reddit post. To list them here, here are the Judgment, Yakuza: Like a Dragon, Lost Judgment, Like a Dragon Gaiden: The Man Who Erased His Name and Like a Dragon: Infinite Wealth mods.

When playing Lost Judgment, I had an issue where when I opened the Kaito DLC menu from the phone screen, my game would freeze without a way to fix it. This was especially bad, because I would open the pause menu to heal and misclick and have to go back to my last save point...and guess what happened three times during the first fight of the finale...So, yeah, I would also recommend this mod that removes the button entirely. Goodbye, motivational Kaito-san. I won't miss how you made my game crash.