🇯🇵 eSIM
Japan eSIM – anonymous, no KYC, from $1.60/GB
NTT Docomo and Softbank 5G across Honshu, Kyushu and Hokkaido.
Per GB
$1.60
No daily fees
Networks
NTT Docomo · SoftBank
4G / 5G
Hotspot
Included
Tether laptops, tablets, consoles
Japan is the country where a pre-installed eSIM saves the most time. Local prepaid SIMs require a passport and, for most products, a Japanese address, and the airport vending machines are convenient but expensive per gigabyte. Anon eSIM attaches to NTT Docomo or SoftBank at $1.60 per GB, with no registration and no plan to run out halfway through Kyoto.
Japan data pricing
One rate: $1.60/GB, metered per MB against a prepaid USD balance — this is how our no-KYC eSIM works, and the balance never expires. No daily passes, no expiring bundles, no throttling tiers - unused credit stays on your eSIM forever and works in the next country you visit.
| Top-up | Data in Japan | Effective rate |
|---|---|---|
| $5.00 | ≈ 3.1 GB | $1.60/GB |
| $10.00 | ≈ 6.3 GB | $1.60/GB |
| $20.00 | ≈ 12.5 GB | $1.60/GB |
| $50.00 | ≈ 31.3 GB | $1.60/GB |
A one-time $5 setup fee applies to a brand-new eSIM; top-ups to an existing eSIM carry no fee. Rates are pay-as-you-go, so light days cost cents and heavy days just draw down the balance faster.
Arriving in Japan
Narita, Haneda and Kansai all have prepaid SIM counters and vending machines (Mobal, IIJmio, SoftBank). They work, but they photograph your passport, and a 7-day 3 GB card is typically ¥3,000–4,500. Install Anon eSIM on the plane's Wi-Fi or at the airport, switch on Data Roaming for that line, and you are on Docomo before you reach the Narita Express platform. Google Maps works underground on the Tokyo Metro because the tunnels are fully covered.
How much data does a Japan trip use?
Ten days Tokyo–Kyoto–Osaka: maps, Google Translate camera, train apps, photos
10 days · 4–6 GB · $ 6.40–$9.60 at $1.60/GB
Japan is data-heavy for visitors: Google Translate's camera mode, Navitime or Google Maps for trains, and a lot of photo backup. 400–600 MB a day is normal; 4–6 GB for ten days is $6.40–$9.60. Convenience-store and hotel Wi-Fi is everywhere and keeps the number down.
Networks and speeds in Japan
Anon eSIM connects through roaming agreements with NTT Docomo and SoftBank, with 4G / 5G typically available to roamers. Your phone picks the strongest partner signal automatically and re-selects as you move - there is nothing to configure.
Excellent nationwide, including Shinkansen lines and subway tunnels. Remote mountain onsen towns may drop to 4G.
Docomo has the best rural and mountain coverage in Japan and is the partner you will see most; SoftBank is strong in cities. 5G is widespread in Tokyo, Osaka, Nagoya and along the Tokaido Shinkansen, with LTE elsewhere. Shinkansen tunnels and the Tokyo subway are covered. Remote onsen towns in the Japanese Alps and parts of Hokkaido drop to LTE or lose signal in valleys, on every network including Docomo's own customers.
The APN is provisioned automatically with the eSIM profile. You do not need to enter APN settings manually on iOS or Android - the only switch you must flip is Data Roaming: ON for the Anon eSIM line, because the service is technically a roaming profile everywhere it operates.
NTT Docomo · SoftBank
Partner networks, selected automatically
4G / 5G
Typical roaming speeds, hotspot at full speed
200+ countries, one balance
Same eSIM keeps working across borders
Setting up your Japan eSIM
- 1
Buy credit
Pick an amount ($5 minimum) and pay by card, Apple Pay / Google Pay, or crypto (BTC, Lightning, USDT). No account, no email, no ID.
- 2
Install the eSIM
Scan the QR code from another screen, or tap “Install on this iPhone” for a one-tap LPA install. Works on iOS 12.1+ and Android 10+ with eSIM support.
- 3
Turn on Data Roaming
Enable Data Roaming for the Anon eSIM line only. Your primary SIM's settings are untouched. APN configures itself - no manual settings.
- 4
Land in Japan and connect
Your phone attaches to NTT Docomo (or SoftBank) within a minute of leaving airplane mode.
- 5
Top up whenever
Balance running low? Add credit from the account page in under a minute. Same eSIM, same ICCID, no new QR - and no setup fee ever again.
In-country context: Japan
Japan's Mobile Voice Communications Act requires identity verification for any local SIM with a phone number, and in practice data-only prepaid products also record your passport. Tourist SIMs are legal but always registered. A roaming eSIM is treated exactly like a visitor's home SIM: Docomo or SoftBank see a foreign operator's subscriber, and the point-of-sale rules never engage.
On arrival: Narita (NRT), Haneda (HND) and Kansai (KIX) have prepaid vending machines - convenient but slow and priced high per GB. An installed eSIM attaches to Docomo on the Narita Express.
Typical speeds: 50-180 Mbps on 4G; 300-600 Mbps on 5G in Tokyo, Osaka, Kyoto. Prices from the live rates data: $1.60/GB, metered per MB against a prepaid USD balance.
Registration status
Passport required for local SIMs
Anon eSIM sidesteps this entirely - the eSIM is issued from an ID-free jurisdiction and you use it as a visitor's roaming SIM in Japan. No local paperwork.
Anon eSIM vs a local Japan SIM and mainstream eSIMs
A 7-day 3 GB airport SIM at ¥3,500 works out around $7.50/GB; Airalo's Japan 5 GB / 30-day plan is about $11.50 with an account. Anon eSIM is $8 for the same 5 GB with no account, and if you only use 3 GB, the other $3.20 is waiting for your next trip. No Japanese phone number, so book restaurants through apps or your hotel.
Compare providers on price, expiry and KYC in the no-KYC eSIM comparison.
Travel profiles for Japan
Trip-specific breakdowns of what to expect, how much data, and what it costs.
Popular cities in Japan
Japan eSIM FAQ
Does Anon eSIM work on the Shinkansen and the Tokyo subway?
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Yes. Docomo and SoftBank cover the Tokaido, Tohoku and Sanyo Shinkansen lines including tunnels, and the Tokyo Metro and Toei subway networks are fully covered. Expect LTE in tunnels and 5G in stations and above ground in cities.
Do I need a Japanese phone number for anything?
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Rarely as a tourist. Restaurant booking apps like Tabelog sometimes ask for one; most visitors book through their hotel or use Google Maps reservations. Anon eSIM is data-only, so use WhatsApp, LINE or Signal for calls.
Is it faster to buy a SIM at Narita?
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It is fast but registered: the counter photographs your passport, and the vending machines still tie the SIM to your details on activation. Installing the eSIM takes a minute and needs no paperwork.
Does hotspot work in Japan?
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Yes, at full speed, included. Tethering a laptop on the Shinkansen is one of the most common uses we see for Japan.
What about South Korea on the same trip?
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Same eSIM: it attaches to KT or SK Telecom in Korea at $1.40/GB. Korea also requires passport registration for local SIMs, so the same logic applies.
Other asia destinations
Works the moment you land
Phone connects to a local network in Japan automatically.
Installed in 60 seconds
QR or one-tap install. APN configures itself.
One eSIM for the whole region
Cross borders and the same eSIM picks the local network.