The new "S Work" carriage on the N700S Shinkansen, which feels just like a Japanese Internet Cafe on wheels. (ITSUKA JAPAN)

We are heading to a traditional Japanese onsen ryokan, deep in the snowy mountains. (News On Japan)

Air will remain chilly across much of Japan on February 20, but temperatures are set to surge over the three-day weekend from February 21 to 23, bringing with them sharp temperature swings, strong winds, heavy pollen and yellow sand—dubbed the “Spring 4K”—that could affect travel and outdoor plans. (News On Japan)