Prepaid mobile data · East Asia

Japan Mobile Data Costs

Compare sourced prepaid mobile data plans for local or visitor use. Prices remain in JPY, with package limits and official sources shown below.

See reference plans Read methodology Explore Japan

Sampled operators: 1
Verified plans: 1
Currency: JPY
Checked: 2026-08-09

Published package values

Published prepaid plan

Only generally usable data is normalized. Conditional app, 5G and activation bonuses are excluded when separable.

Operator and plan	Audience	Package price	Data	Validity	Derived price/GB	Source
IIJmioJapan Travel SIM/Digital 10 GB	Visitor prepaid	¥3,280Tax exempt	10 GB	30 days	¥328	Official planChecked 2026-08-09

Market context

Operator and registration notes

MVNOIIJmio

Official operator website

RegistrationIdentity rules apply

This data-only travel eSIM does not include a Japanese voice number or SMS.

Regulatory referenceMinistry of Internal Affairs and Communications

Official regulator website

Limits and method

What this report does and does not compare

Japan Travel SIM/Digital 10 GB

Fair-use and eligibility: Data-only service on the NTT Docomo network; no voice or SMS.

Normalization: Package price divided by 10 GB of included general-use data. Voice, SMS, roaming and promotional extras are not assigned estimated values.

Source review: Checked on 2026-08-09 with a high confidence rating; next review due 2026-09-09.

Validity starts with the first data session.

Local SIM, home-operator roaming and travel eSIM are different products. Roaming prices are not shown until a consistent route-based comparison is available.