SIM & Phone Plan Optimizer
携帯プラン比較
📱 Save ¥36,000 - ¥96,000 per year by switching to a cheaper plan!
Most foreigners overpay for mobile. Find the best plan for your needs.
Find Your Perfect Plan
💡 Yamada Hack: Rakuten Mobile + Rakuten Card Combo
If you use Rakuten ecosystem, their mobile plan gives you extra Rakuten Points multiplier at Rakuten Ichiba. Combined with Rakuten Card, you can earn 4-5x points on all purchases!
- • Rakuten Mobile: +1x point multiplier
- • Rakuten Card: +2x point multiplier
- • Rakuten Bank: +0.5x point multiplier
- • Combined: massive savings on everyday shopping
What You Need to Sign Up
Before Switching
- • Check your current contract - early cancellation may have fees
- • Keep your phone number by requesting MNP (番号ポータビリティ)
- • MVNOs may be slower during peak hours (lunch, evening commute)
- • If you need physical store support, choose UQ Mobile or Y!mobile
❓ Frequently Asked Questions
❓ Can foreigners get a SIM card in Japan?
✅ Yes! You need a Residence Card (在留カード) and sometimes a Japanese bank account or credit card.
❓ What is the cheapest plan?
✅ povo 2.0 has a ¥0 base plan - you only pay for data when you need it. LINEMO Mini is ¥990/month for 3GB.
❓ Which carrier has English support?
✅ Rakuten Mobile and ahamo have English apps and support. Most MVNOs are Japanese-only.
❓ Can I keep my phone number?
✅ Yes! Request MNP (番号ポータビリティ) from your current carrier. You will get an MNP code to give to your new carrier.
❓ What is eSIM?
✅ A digital SIM - no physical card needed. You can activate instantly by scanning a QR code. Most new phones support it.
❓ Are cheap plans slower?
✅ MVNOs may be slower during peak hours (lunch, evening). Major carriers like ahamo use full docomo speed.