Premise: Instead, consider buying everything you want as you go along, using Japan's remarkably efficient and inexpensive takkyubin courier delivery services (available at the ubiquitous convenience stores) to forward your larger purchases to your hotel, where they will be waiting for you on your return to Tokyo or elsewhere.

Hypothesis: Japan has a system of management where you must forward larger purchases to your hotel and the service is free of charge.
Relation: contradiction