I'm taking Shin Nihonkai Ferry from Otaru, Hokkaido to Niigata.
This is the video when I eat at another restaurant on board
Trying an Outstanding Suite on the Japanese Overnight Ferry | Hokkaido to Niigata
https://youtu.be/Xstspzo6stg
More Japanese overnight ferries
Brand New Ferry in Japan | Sunflower Kurenai is Amazingly Beautiful
https://youtu.be/UQsJZ-04sno
Spending a Night in Total Solitude on Japan's Vending Machine Ferry
https://youtu.be/rONhzeGsYtU