In 2026, the Sunrise Seto and Sunrise Izumo remain the only regularly scheduled overnight sleeper trains in Japan that are not prohibitively expensive ultra-luxury "cruise" trains. The Sunrise Seto runs between Tokyo and Takamatsu, while the Sunrise Izumo connects Tokyo to Izumoshi. These trains are famous for their unique "High-Fidelity" Nobi Nobi floor spaces, which are carpeted sleeping areas that can be booked with a standard JR Pass for no extra charge. For a higher-value experience, you can book private "Single" or "Twin" compartments. If you are seeking the absolute "High-Fidelity" pinnacle of luxury, the Seven Stars in Kyushu or the Twilight Express Mizukaze are the best "Cruise Trains," offering 5-star dining and opulent suites, though these require booking months in advance and cost thousands of dollars. For the average traveler, the "Sunrise" express provides the highest-fidelity blend of nostalgia, practicality, and efficiency, allowing you to wake up at your destination refreshed while saving the high-value cost of a hotel night in Tokyo.