1. The IPA handbook is a work of phonetics, not phonology.
2. Yes, that is a serious proposal for palatalized vowelspublished by a serious linguist, whom I assuming doesn't use the moniker kwamigami at wiki.
3. You seem to have a very limited inflexible approach to this topic, which is unfortunate. Why can't you compass the idea of expanded discussion and alternative accounts (which might not agree with how to describe Japanese phonology)? And you wonder why so many people have given up on trying to improve linguistics pages at wiki?133.7.7.240