よりそいスマホ料金案内所日本語
Mobile Plan Guide Japan

Compare Japanese mobile plans with confidence.

Simple guidance for SoftBank, Y!mobile, switching, eSIM and in-store support. Check conditions before you apply.

For people living in Japan who want to review their mobile bill or keep their number when switching.

Start with your recent data use, call time, number of family lines and home internet. Compare the base price separately from conditional discounts, then apply on the carrier page.

Living in Japan or visiting for a short stay?

Use the general application checklist, or check eSIM preparation specifically if you are moving to Japan.

General application checklist →
Moving to Japan: eSIM checklist →

Continue to the official Japanese application page

Official application links (advertising)

What you can compare

Monthly plans

Compare data allowance, base price and support.

Switching & eSIM

Follow practical steps without losing your phone number.

Family savings

Check family and home-internet discount conditions separately.

The application page is in Japanese. Contract terms and identity verification are governed by the carrier.

Need help with the steps? Check a shop before visiting.