I'm taking Shin Nihonkai Ferry from Hokkaido to Tsuruga and trying the Suite cabin. It takes 34 hours.
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https://youtu.be/XAzFYEoQ0U0
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https://youtu.be/wO2YcSpYUog
21-Hour Capsule Hotel Ferry Trip in Japan | Osaka/Kyoto to Hokkaido
https://youtu.be/6dmfm0FRTV0
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