MugenSIM Premium Unlimited Plan

Where it works
Japan

Residence
MugenSIM can only be purchased by non-Japanese residents.

Device compatibility
Before purchasing your eSIM, please check whether your device is compatible from here.

After your purchase
For the best experience, purchase your eSIM shortly before your trip or after arriving in Japan.

Your eSIM with installation links, QR code, and setup instructions is delivered by email within minutes, so you can install it right away.

Install the eSIM within 180 days after receiving the confirmation e-mail with your eSIM details.

Disable Roaming from your departure.

Plan starts at JST when you connect to the operator. Once you connect to the operator's network in Japan. Plans run on Japan time (JST), from 00:00 JST to 23:59 JST. Connecting later during the day means you will have less than 24 hours on the first day you connect.

What's included
✓ Plan: Unlimited data
✓ Validity: according to the selected plan
✓ High-speed data: Unlimited
✓ Local phone number: Not included
✓ Calls & texts: Use internet-based apps such as WhatsApp, FaceTime, Skype, and similar services
✓ Hotspot: Included (up to the cap of the selected plan). After high-speed usage: Speeds continue at up to 128 kbps

Network: KDDI

Coverage
Enjoy reliable coverage across Japan on KDDI's nationwide network, including Tokyo, Osaka, Kyoto, Sapporo, and other major destinations.

Coverage and speeds may vary in remote regions, including rural Hokkaido and mountainous areas. Please check the Coverage to learn more.

Fair Use Policy
Service is also subject to KDDI's Fair Use Policy. Excessive or abnormal usage may result in additional speed restrictions or service suspension.

Full details: Operator Terms & Conditions