Proposed changes to the article so as to avoid reversion struggles 

1. That possible vowel inventories be exanded to 10 distinct vowels, after Vance.

2. That discussion of diphthongs be expanded, after Vance.

3. That discussion of J /r/ be exanded to include the possibility of (1) two /r/ phonemes and (2) more allophones than the ones described in the article. Source would be Trubetskoi book and Labrune article.

I would point out that Vance is about the only English-language book we have that is devoted to the topic of 'Japanese phonology' and it is a standard source on the topic (even it is limited in its approach by traditional phonemic description and doesn't make use of alternatives, such as natural phonology and articulatory phonology).

Speak now if you can't live with these. 133.7.7.240