Coudal Partners linked to this rather nice toy by Morisawa & Company. My Japanese knowledge is rather woeful, so I don’t have very much more information than; it’s pretty, it’s fun, it has a very nice interface, and it appears to be promoting the sheer loveliness of Morisawa’s fonts, so please buy some. I was told by a Korean colleague that there are relatively few fonts available for East Asian languages compared to Western ones because of the sheer number of glyphs that need to be designed, so I would guess a new one would elicit at least a moderate fanfare. Maybe. Anyway, have a play - here are a few screenshots: