The Super Mario Odyssey original soundtrack launched in Japan a short while back, and it contains a booklet with some artwork, notes, and more. It also happens to include special messages from music lead Naoto Kubo and director Kenta Motokura. You can read what they had to say below.

Naoto Kubo
This time Mario goes on a big adventure where he travels to countries with various uniqueness. If the music also changes drastically based on the country, then there'd be the feeling of a journey and it'd sound interesting! So the three of us made the music like this; myself, Koji Kondo, and Shiho Fujii.
Fossil Falls has an orchestra present a primitive world which gives the feel of the beginning of a big adventure. This song's melody starts with wooden pipes, and then the horn, tin whistle, accordion, and strings gradually kick in. I hope you can feel the sound scenery that's lush with colors.
Jump Up, Super Star! is especially made to be easy to get familiar with, and to make everyone happy! The composer and arranger Mr. Yoichi Murata arranged certain tracks with trombones, based on the New Donk City Festival Edition produced specifically for games. I think the songs may have become very fun to play.
Other than that, this game's music has literally everything, from comfortable Bossanova-style music, Irish-style music, to even rock songs! I think many people may be surprised with the festival-like music in Bowser's Castle.

In order to create such a lus...