21/09/2016
If you want to across Japan by local trains plus night ferries next winter, why don't you use by Seishun 18 Kippu (青春18きっぷ)? We suggest this itinerary, from Makurazaki in Kyushu to Wakkanai in Hokkaido. For more details and timetable schedule, visit our renewed mobile-friendly website (in Japanese).
http://ekinavi.wixsite.com/japantraveler/blank-21
English version will be available until the end of this year.