Are you planning a trip to Japan anytime soon? If you are, changes are you’re trying to include more than one city in your itinerary. Japan has fantastic transportation options, but nobody wants to lug around their large suitcases on trains and buses across the country. Japan has a service that can help with this.
Luggage transport is an amazing invention that after using, most people wish would be implemented everywhere they go. You can ship your luggage from one hotel/airport to the next without having to carry it around yourself. Most hotels have the option at the front desk, as do 7-11 locations (if you don’t know about 7-11s in Japan, you should look into how much cooler they are). The average for your luggage making it to the destination seems to be 24 hours, but if you have a tight connection you might still want to be careful. And the service is very affordable, often only $10-$20 (1500-3000 yen) per item of luggage.
Have you tried luggage transfer? Did it work out for you?