Jul 12 (Solo Travel Japan) - I tried a Nobi Nobi seat on the Sunrise Express, Japan’s last sleeper train. It was more spacious than I had imagined. It was a unique and interesting experience.
Riding on a Nobi Nobi seat from Tokyo to Takamatsu was 15,170 JPY (138 USD). If you have a JR pass, you can ride on the Nobi Nobi seat, however you still need to reserve a seat at the ticket office. If you carry a big luggage, it's better to reserve a lower seat.