A Japan eSIM is a virtual SIM card that connects you instantly to Japanese mobile networks (NTT Docomo, SoftBank, KDDI/au) without a physical card. Plans start at $5.50 for 1 GB, up to $47 for unlimited.
Do you really need an eSIM? Japan is not in the European Union: no free EU roaming. International roaming fees are very high ($5-10/MB). An eSIM is therefore essential to avoid astronomical bills.
Personalised selection with promo codes & direct links, then reminders before you leave
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| # | Plan | Data | Duration | Price/GB | Code | Price | Action |
|---|---|---|---|---|---|---|---|
1 |  30 days - 10GB5G Saily Compatible apps WhatsAppMapsInstagramTikTok+6 Coverage:  | 10.00GB | 30 days | $1.63 | -10% | $16.34$18.16 | |
2 |  Japan GoMoWorld Compatible apps WhatsAppMapsInstagramTikTok+6 Coverage: | 17.00GB | 30 days | $0.63 | -10% | $10.78$11.98 | |
3 |  Corée Du Sud Forfait eSIM prépayée - 3Go | Ubigi Ubigi Compatible apps WhatsAppMapsInstagramTikTok+6 Coverage: | 24.00GB | 360 days | $0.37 | -10% | $8.83$9.81 | |
4 |  1 TB - 30 Days5G RoamifyKDDI Compatible apps WhatsAppMapsInstagramTikTok+6 Coverage: | 1000.00GB | 30 days | $0.07 | -5% | $71.25$75.00 | |
5 | 1 TB - 30 Days5G RoamifyKDDI Compatible apps WhatsAppMapsInstagramTikTok+6 Coverage: | 1000.00GB | 30 days | $0.07 | -5% | $71.25$75.00 | |
6 | 1 TB - 30 Days5G RoamifyKDDI Compatible apps WhatsAppMapsInstagramTikTok+6 Coverage: | 1000.00GB | 30 days | $0.10 | -5% | $95.00$100.00 | |
7 | 1 TB - 30 Days5G RoamifyKDDI Compatible apps WhatsAppMapsInstagramTikTok+6 Coverage: | 1000.00GB | 30 days | $0.10 | -5% | $95.00$100.00 | |
8 | 1 TB - 30 Days5G RoamifyKDDI Compatible apps WhatsAppMapsInstagramTikTok+6 Coverage: | 1000.00GB | 30 days | $0.10 | -5% | $95.00$100.00 | |
9 | 1 TB - 30 Days5G RoamifyKDDI Compatible apps WhatsAppMapsInstagramTikTok+6 Coverage: | 1000.00GB | 30 days | $0.10 | -5% | $95.00$100.00 | |
10 | 1 TB - 30 Days5G RoamifyKDDI Compatible apps WhatsAppMapsInstagramTikTok+6 Coverage: | 1000.00GB | 30 days | $0.10 | -5% | $95.00$100.00 | |
11 |  Japan 50 GB for 180 days5G LinkeSIMNTT docomo Compatible apps WhatsAppMapsInstagramTikTok+6 Coverage: | 50.00GB | 180 days | $0.64 | - | $32.00 | |
12 |  Japan RedteaGO Compatible apps WhatsAppMapsInstagramTikTok+6 Coverage: | 50.00GB | 180 days | $0.57 | -5% | $28.40$29.90 | |
13 |  Global Package Yesim Compatible apps WhatsAppMapsInstagramTikTok+6 Coverage:       +77 | 80.00GB | 365 days | $1.26 | -15% | $100.99$118.81 | |
14 |  Japan 50GB 180 Days5G AdventureSIMsNTT docomo Compatible apps WhatsAppMapsInstagramTikTok+6 Coverage: | 50.00GB | 180 days | $0.69 | -10% | $34.48$38.31 | |
15 |  Asialink - 100 GB5G AiraloKDDI, Softbank Compatible apps WhatsAppMapsInstagramTikTok+6 Coverage:      +12 | 100.00GB | 180 days | $0.76 | -15% | $75.65$89.00 |
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+12Airalo offers the best value: 10 GB for $14 with code ESIMP15 on the NTT Docomo network (99.9% coverage). For unlimited, Holafly from $47 for 15 days.
Absolutely yes. Japan is not in the EU: no free roaming. Roaming fees are prohibitive ($5-10/MB). An eSIM is essential to avoid astronomical bills.
From $5.50 (1 GB) to $47 (unlimited 15 days). Best value: Airalo 10 GB at $14 with code ESIMP15.
Exceptional (99.9%) even in rural areas. Three major carriers: NTT Docomo (leader), SoftBank, KDDI/au. Perfect 4G/5G coverage in Tokyo, Kyoto, Osaka, Hokkaido, Okinawa.
Yes. Coverage is identical to the mainland. Okinawa has excellent coverage even on isolated beaches. Hokkaido offers excellent coverage even in mountains.
Holafly: allowed. Airalo: generally yes. GoMoWorld, Saily, Ubigi: works but not guaranteed. Plan 15+ GB for 2 people.
24-48 hours before departure from your home WiFi. Validity starts at first connection in Japan. Installation can be done without internet connection in Japan.
1. Verify eSIM is set as primary data line 2. Enable "Data Roaming" 3. Restart your phone 4. Contact 24/7 support (Airalo, Holafly, GoMoWorld) 5. Verify your phone is eSIM compatible
Three common travel styles, three focused picks. Enter the partner promo code at checkout, then fine-tune plans in the comparison table above.
A few days on the ground: maps, messaging and socials.
Recommended minimum: 5 GB
For short stays, compare data, duration and price across providers: enough for maps, messaging and socials without overpaying.
Up to 3 plans that match this travel style
Several phones, mixed usage, you want peace of mind.
Recommended minimum: 20 GB
For families, favor large buckets or unlimited for the whole trip, then double-check hotspot rules and fair-use policies.
Up to 3 plans that match this travel style
Video calls, large files, sustained mobile usage.
Recommended minimum: 30 GB
For remote work, aim for a comfortable allowance (often 30+ GB) or unlimited, and validate network coverage and stability for your destination.
Up to 3 plans that match this travel style
Japan is not a member of the European Union. No free roaming applies. French carriers typically charge $5-10 per MB in Japan, which can quickly generate bills of several hundred euros for just a few days of travel.
Japan has exceptional 4G/5G coverage (99.9%), even in the most remote rural areas, thanks to three major carriers:
| Carrier | Coverage | 5G | Used by |
|---|---|---|---|
| NTT Docomo | 99.9% | Yes | Airalo, Ubigi |
| SoftBank | 99.5% | Yes | Holafly, GoMoWorld |
| KDDI/au | 99.3% | Yes | Saily |
Compatibility: iPhone XS+, Samsung S20+, Pixel 3+, Xiaomi 12+, OnePlus 8+
Comparatif
| # | Fournisseur | Data | Durée | Prix | Code promo | Idéal pour | |
|---|---|---|---|---|---|---|---|
| 1 |  | 10 GB | 30 days | $14 | Global leader + NTT Docomo network | ||
| 2 |  | Unlimited | 15 days | $47 | — | Unlimited data + hotspot | |
| 3 |  | 10 GB | 30 days | $16 | SoftBank network (99.5% coverage) | ||
| 4 |  | 3 GB | 30 days | $9.80 | NordVPN included | ||
| 5 |  | 10 GB | 30 days | $17.50 | — | Premium NTT Docomo network |
For all travelers to Japan, an eSIM is essential: no free EU roaming, prohibitive roaming fees ($5-10/MB).
Our recommendation: Airalo 10 GB at $14 with code ESIMP15 offers the best value on the NTT Docomo network (Japanese leader).
For heavy users: Holafly unlimited eliminates any overage stress.
Developer and digital nomad, I lived between Canada and the United States before continuing to explore the world. After struggling with internet connectivity abroad one too many times, I created eSIMPlanet to compare plans clearly and honestly. Every article is carefully written and reviewed to save you time and money.
