How to recharge a Japanese mobile number from abroad

Japan's prepaid market

Japan has one of Asia's most developed mobile markets, with Docomo, SoftBank and au (KDDI) dominating. All three offer prepaid SIMs popular with tourists and short-term residents.

Supported operators

• NTT Docomo — largest network, best rural coverage.
• SoftBank — strong in urban areas, popular prepaid tourist SIMs.
• au (KDDI) — solid data performance in major cities.

Number format

Japanese mobile numbers are 11 digits (e.g. 090-XXXX-XXXX). When entering the number on our platform, omit the leading 0 — we pre-fill the +81 country code automatically.

What credit can I send?

Options include airtime credit (denominated in JPY), 3 GB · 7-day data packs, 15 GB · 30-day data packs, and unlimited combo bundles. Availability varies by operator.

Delivery time

Most top-ups to Japanese numbers are delivered within seconds. Docomo and SoftBank typically confirm faster than au.