Overview
Japan is one of the easiest countries for travelers to stay connected. In 2025, prepaid SIM cards provide fast 4G/5G data without contracts, paperwork, or device rentals. Whether you’re visiting Tokyo, Kyoto, Osaka, or Okinawa, a prepaid SIM gives you instant, reliable access as soon as you land.
This guide compares Japan’s best SIM providers, explains typical prices and data plans, and shows where to buy SIM cards both online and in Japan.
Why Choose a Prepaid SIM in Japan
Prepaid SIM cards remain the most flexible option for short-term travelers. They offer:
- No long-term contract or Japanese address required
- Works instantly on most unlocked smartphones
- Easy pickup at airports or delivery to hotels
- Reliable nationwide coverage, including rural areas
- No need to carry or charge extra devices (unlike pocket Wi-Fi)
If you want simplicity and strong network performance, prepaid SIMs are the easiest way to stay online anywhere in Japan.
Japan Travel SIM Card Comparison (Updated 2025)
| SIM Card | Duration & Data | Network | Price (approx.) | Purchase Method |
|---|---|---|---|---|
| Mobal Japan Unlimited | 30 days / Unlimited (FUP applies) | SoftBank | $50 | Online |
| Japan Experience SIM | 8 / 16 / 31 days / Unlimited | NTT Docomo | $25〜 | Online / Airport pickup |
| Sakura Mobile SIM | 15 days / Unlimited (slows after 3GB/day) | NTT Docomo | $50 | Online |
| Bic Camera Prepaid SIM | 7–30 days / 500MB–10GB+ | SoftBank | $45 (10GB/30 days) | In-store only |
※Prices approximate. Exchange rate based on $1 = ¥150.
Each option offers different strengths: Mobal for English support, Japan Experience for airport pickup convenience, Sakura Mobile for long stays, and Bic SIM for local in-person purchase.
Top Prepaid SIM Providers in Japan (2025 Edition)
1. Mobal Japan Unlimited SIM
Network: SoftBank
Data: Unlimited
Price: approx. $50 / 30 days
Best for: Travelers who want stable long-term connectivity
Mobal is known for reliable nationwide coverage and strong English support. You can order online and choose airport or hotel delivery.
2. Japan Experience SIM
Network: NTT Docomo
Data: Unlimited (8, 16, 31-day options)
Price: approx. $25~(8days~)
Best for: Short-term visitors needing the best coverage
Simple activation and easy airport pickup make this one of the most tourist-friendly choices.
3. Sakura Mobile Prepaid SIM
Network: NTT Docomo 4G/5G
Data: Unlimited (speed slows after 3GB/day)
Price: approx. $50 / 15 days
Best for: Remote workers, long regional trips
Fast speeds in major cities and rural regions like Hokkaido and Okinawa.
4. Bic Camera Prepaid SIM (Bic SIM)
Network: SoftBank
Plans: 500MB–10GB+ / 7–30 days
Price: approx. $45 (10GB/30 days)
Best for: Travelers who want a local in-store purchase
Ideal for spontaneous buyers. Staff can help with setup.
How to Choose the Right Prepaid SIM
1. Trip length
- Under 10 days → Japan Experience SIM
- 2–3 weeks → Sakura Mobile or Mobal
- 1 month → Mobal Unlimited
2. Data usage
- Heavy users → Unlimited plans
- Casual users → 3–5GB is enough for one week
3. Phone compatibility
Ensure your phone is unlocked and supports Bands 1 / 3 / 8 / 19.
4. Order early
Online purchase ensures smooth pickup at the airport or hotel.
Step-by-Step: How to Activate Your SIM
- Insert the SIM card
- Restart your phone
- Enter APN settings if required
- Test internet connection
- Top up online if needed
Setup usually takes under 10 minutes.
Typical Data Plans and Prices (USD)
| Duration | Data | Average Price | Ideal User |
|---|---|---|---|
| 7 days | 3–5GB | approx. $10–$17 | Short-term travelers |
| 15 days | 10GB | approx. $20–$27 | Moderate users |
| 30 days | 20GB+ | approx. $30–$40 | Long stays |
| 30 days (Unlimited) | Unlimited | approx. $45–$50 | Heavy users |
These reflect common 2025 prepaid SIM prices (exchange rate $1 = ¥150).
Where to Buy Prepaid SIMs in Japan
| Location | Options | Notes |
|---|---|---|
| Airports (Narita, Haneda, Kansai) | Japan Experience, Sakura Mobile | Best for instant pickup |
| Electronics Stores | Bic Camera, Yodobashi Camera | Staff support available |
| Online | Mobal, JRPass.com | Best prices and English support |
Buying online before arrival is usually the most convenient and cost-effective.
Final Thoughts
In 2025, prepaid SIM cards remain the simplest and most affordable way to stay connected during your trip to Japan. Whether you choose Mobal for easy support, Sakura Mobile for reliable speeds, or Bic Camera for local purchase, every option provides good nationwide coverage.
Plan your data needs, pick a provider that matches your travel length, and enjoy fast 4G/5G access throughout your journey.
