Hm. I'm downloading (from a friend who got it from Japanese p2p) a Japanese DVD edition of AristoCats (entitled there, Oshare Cat). It's quite obviously 4:3. The Buena Vista bumper is replaced by the blue castle bumper, but I can't see anything else. The title seems (so far at least) to use the English credits. Considering it's recent enough to have the "half ring" logo...

EDIT: More detail...

Video format: NTSC, Fullscreen, Progressive (720x480x23.976/4:3)
Audio: 2.0 English (384 kbps), 2.0 Japanese (384 kbps)
Subtitles: Japanese, English
Title cards/Credits are in English
Menus are in Japanese