I have bought watches from Japan before and the packaging and presentation was outstanding. I also got a hand-written thank you letter! Such a thoughtful country.
For reference, it's a really good band and Mint Jams is awesome! Specially if you like upbeat jazz with keyboard, synth, and electric guitar, sometimes sax.
Although a lot more people, specially weebs, have heard the first song on that album than have ever heard of the band. As it's common on playlists in the City Pop genre(if you like the first song, look up more city pop. )
Fun facts:
The album is actually remixed live recordings with the audience mostly removed and without re-recording/dubbing any instruments, and recorded with the intent to make studio quality. So it sounds amazing.
The "mint" part does in fact refer to the songs/album being "mint", meaning good. The "jams" part actually references that it's live recordings as well.
On top of that it is also an arragement of the band members first and last initials(IN, MM, TS, AJ).
Released in 1982 it was their seventh album, second live, and after having released ~40 albums in total. It is still considered their best.