Unboxing of the Cave Collection Kan, the second and most recent of the Cave Collections for the Xbox 360. Kan has an extra game included compared to the first edition, Akai Katana, but doesn't include the soundtracks for the games which are in a separate box included with the first collection.
The Cave Collections for Xbox 360 were released in 2013 and 2014 respectively and are quite pricey.
Besides getting the collection you also need a JP Xbox 360 or a modded 360 machine to play some of the games as they are decidedly region locked. Let's hope all these games get re-released on current consoles.