Japanese version of Breakfast at Tiffany's - 50th Anniversary Edition Blu-ray comes with some goodies which seem to be exclusive to it.
- a soundtrack CD (12 tracks)
- a miniature reproduction of shooting script
- a set of 3 postcards
Maybe they are not something to get excited, but not bad IMO.
Especially soundtrack CD is welcome because it's been OOP in Japan.
As far as I can tell from the catalogue info on Paramount Japan's official product's page
disc extras are identical to the US counterpart, but language options are not:
Audio:
English 5.1 DTS-HD Master Audio
English Restored 2.0 Mono
Japanese 5.1 SR
Russian 5.1 SR
Polish 2.0 Mono
Audio commentary:
English 2.0 Stereo
Subtitles:
Japanese, English, Thai, Korean, Mandarin, Cantonese, Hindi, Indonesian, Hungarian, Polish, Turkish, Greek, Portugese, Bulgarian, Malay, Romanian, Icelandic, Arabic, Hebrew, Czech, Slovak, Croat, Serbian, Slovene, Russian, Ukrainian, Estonian, Lithuanian, Lettish
Subtitles for audio commentary:
English, Japanese, Korean
Japanese, English, Thai, Korean, Mandarin, Cantonese, Hindi, Indonesian, Hungarian, Polish, Turkish, Greek, Portugese, Bulgarian, Malay, Romanian, Icelandic, Arabic, Hebrew, Czech, Slovak, Croat, Serbian, Slovene, Russian, Ukrainian, Estonian, Lithuanian, Lettish
Subtitles for audio commentary:
English, Japanese, Korean
Region code: A
(so says Amazon JP, but I haven't confirmed it yet.)
This Japanese version is issued as a limited edition.
(There's also BD-only edition, though.)