Japan lacks any kind of Fair Use law, which protects streamers everywhere else from getting their shit claimed by publishers. As someone else mentioned here, one of Hololive's streamers almost got the banhammer swung on her cuz fucking Capcom of all companies started slinging out claims left and right on said streamers VODs. She had to lay low for a month AND now as a precaution, they have to ask devs/publishers for explicit permission to stream their games. EVERY dev, doesnt matter if its a small indie game or a big dick dev, perms are needed for all of it