Willer Express operates a hop-on, hop-off bus service called the Sky Hop Bus[dead link], which bills itself as "the first open-top double decker bus in Japan."
Willer Express waxay ka shaqeysaa hop-on, adeegga baska hop-off ee loo yaqaan ' Baska Sky Hop, kaas oo isagu iska dhigaya biiilkiisa "baskii ugu sarreeyay dusha sare ee furan ee furan Japan. "