I think you miss the point. Think of the movie Titanic, where people were on the boat for a very long time, as opposed to merely an overnight trip.
I think you miss the point. Think of the movie Titanic, where people were on the boat for a very long time, as opposed to merely an overnight trip.
That is similar to how some of these boats look like, just more modern. Here is an example with pictures https://www.ferry-sunflower.co.jp/en/ (disclaimer, I never went that route, the ones I went with were less glamorous, more modern, but still nice) But yeah, it is mostly one night, because the distance is within Japan.