Nice! Those are switches that I think many would like if they got a chance to try them.
I am fascinated by that Japanese layout — which is not JIS. It is quite logical and easy to follow but not at all optimised for finger movement...
The reason why the . and / keys are not grey is apparently because the colouring follows that layout.
The two Kana "alphabets" in Japanese are syllabic: a consonant sound followed by a vowel sound, and the columns and rows correspond (roughly) to consonants and vowels respectively. The three grey keys in a row are Ya, Yu and Yo — but there are no "Yi" or "Ye" in Japanese. Thus, there are only three grey keys on that row.
(Only Ya is in the "correct" column though. Wa, Wo, Ra, Ri, Ru, Re, Ro, N and the "Dakuten" diacritic for soft consonants are to the right of the grey keys)
Edit: I have only found one reference to the layout: here
it is called "ANSI Hiragana Mode". Apparently, there were also MSX machines that did
have JIS instead.