Operating on NTT Docomo’s Vast Network

SonixNet SIM is an MVNO service operating on NTT Docomo’s vast cellular network. You can benefit from the full coverage by NTT Docomo, which covers the largest area among the main three carriers in Japan.

Easy Registration

Our SIM cards are compatible with all unlocked devices. Fill out our application form, present a photo identification (passport, residence card, drivers license are accepted) and you can come to our office to pick up the SIM card or we can have it sent to your residence

Foreign Credit Cards Accepted

Most providers only accept Japanese credit cards but we are able to accept both foreign and Japanese credit cards as your payment method

No Annual Commitments

Our minimum contract period is 4 months (1st month free + 3 billing months). After the contract period you can cancel at any time as long as we know by the 25th of the month that you want to cancel


By Online Form (Anytime)

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By Chat (Anytime)

Click bottom right “Chat Button” ↘️

By Phone (9:30-18:00 JST)

Toll Free within Japan


From Overseas (Incur Overseas Calling Rates)


By Team Viewer (Support)


Subway Oedo Line / Nanboku Line
Short distance walk from exit 6
of Azabu-Juban Station
(1F of our building is Domino’s Pizza)


3F Azabu Maruka Bldg.,
3-8-2 Higashi Azabu, Minato-ku,
Tokyo 106-0044
Tel: 03-3560-1006 Fax: 03-3560-1007