Rainbow SIM card for oversea students

Stay in touch everywhere in Japan

The best SIM card for SMS and voice calls

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RainbowSIM is a must have item when traveling Japan.

No 2-year Contract
The best Japan SIM card Rental for short term visitors because there is no contract.
Get more discount with the app
For voice calls, get 50% discount with the app
Large capacity of 25GB, The latest version of fast access with 4GLTE
Unlimited usage with high speed network.
Unlimited data usage for 3 days
Unlimited data usage for 3 days Fast access with unlimited data usage make your travel comfortable.
Most reliable network with 99% population coverage.
Smooth internet connection anywhere and anytime with Japan’s No.1 net work Docomo.
Flat Rate
Only initial cost and monthly fee will be charged.
Multi Language Support
Instruction Manual:English, Simplified Chinese, Unified Chinese,and Thai. English support:E-mail and TEL.
2 types of size: Micro SIM, Nano SIM
It can connect multiple devices such as iPhone, OPPO, and Wi-Fi router.

Rental Fee(Tax not included)

Initial Cost


Monthly Fee 25GB


Communication Fee

Voice calls
3 min Fixed Price


Plan changes, Cancelation
SIM card
Option Changes of voice calls

Get the best deal!- RainbowSIM

(25GB voice call)
FCompany Y!Company
Monthly Rate ¥3,700 ¥5,570 ¥5,980
Initial Cost ¥2,600 ¥3,394 ¥3,000
Communication Capacity 25GB 20GB 7GB
Data Usage Limitation No Yes Yes
Contract Period No No 2-year
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