Can you send your suitcase to your next hotel in Japan?
Yes, and it is the single best travel habit here. Takkyubin services pick a case up from a hotel front desk or convenience store and deliver it to the next hotel, usually next day, for around ¥2,000. You travel with a small bag, the train is easier for everyone, and the case is waiting when you arrive. Hand it in by the afternoon and name the arrival date.
Where this answer comes from
Say it in Japanese
Show the card to the staff. The Japanese, how to read it, and the recorded voice.