>>14923385>Peninsular JaponicOkay, it's been a while since I touched this subject, I know this is a more plausible theory than whatever meme dravido-koreo-japonic was, but from what I remember(Vovin's take, I don't know any other scholar who touched this subject) Peninsular Japonic means there were always two groups of Japonic language. Peninsular and 上代日本語. Both of them or only peninsular did originate from Chinese Shandong province and later merged into the Japanese island. But not all Peninsular-Japonic speakers moved to Japan hence why scholars could find hints of Peninsular-Japonic in Korea and came up with the theory in the first place. So Peninsular-Japonic is probably the ancestors of both Baekje and Yamato. Even the Chinese sometimes wrote Baekje as 日本. For example, 禰軍 was an ethnic Baekje in service of Tang but his grave also says he's from 日本. (Yes there are chance that Tang people just wrote it 日本 just because Baekje is the west of them hence closer to mystical "sunrise land")
