How much mobile data (GB) is typically required for a week-long stay in Tokyo?

For a standard 7-day trip exploring Tokyo's diverse districts like Shinjuku, Shibuya, and Ginza, CoreESIM suggests a data allocation of 5 GB to 10 GB. This amount generally covers extensive use of navigation apps (e.g., Google Maps, Japan Transit Planner), social media, messaging, and light streaming. Travelers anticipating significant video calls, extensive streaming, or tethering to other devices may consider a 15 GB to 20 GB plan to ensure uninterrupted high-bandwidth access.