A very hard to find release of fantastic music from Splatoon's background by Garuna [aka Owata P.]. 
 
Not officially connected with Nintendo corp.  I strongly recommend this as a highly enjoyable listening experience from a rare release even in Japan.  A prize for Splatoon fans for sure.

Tracks:
1) Opening
2) Behind the Scenes Waltz [Jam Session]
3) Drama-based Dance [Dyed in Kimi Colour]
4) Rest Room [Splattack!]
5) After the Match [Ika Jamaica]
6) Temporary Interlude [Lookin' Fresh]
7) Get Drunk with Night Drink [Smithoe Night]
8) Reincarnation [Mystery File]
9) From the Mother Sea [Kraken Up]
10) Lullaby
11) Shikara-bushi -peaceful mix-
 
Cover artwork by: May Illness Mario