Saily Japan Review: Prices, Network & Honest Assessment (2026)
TL;DR
Saily is the eSIM launched by NordVPN, offering competitive prices, a polished app and solid built-in security features. For Japan, plans range from 1 GB to 20 GB (plus "unlimited" options with throttling), running on the KDDI network. The strengths are real — but Saily does not offer a truly unlimited plan without speed caps, support is in English only and IP routing goes through Hong Kong. For travelers who want optimal coverage across all of Japan, a 50 GB or unlimited plan on the NTT Docomo network remains the most reliable choice.
What exactly is Saily?
Saily is an eSIM provider created by Nord Security, the company behind NordVPN — one of the most popular VPNs in the world. Launched in 2023, Saily covers over 150 countries and quickly established itself in the market thanks to its parent company's reputation.
The concept is straightforward: you buy a data plan through the Saily app, scan a QR code, and your eSIM activates on your smartphone. No physical SIM card, no airport counter.
What sets Saily apart from competitors is its cybersecurity heritage. The app includes a built-in VPN and ad blocker — two tools travelers don't always think to install, but which are useful when connecting to public Wi-Fi networks in Japanese train stations or cafes.
Saily is a reseller, not a carrier. For Japan, plans run on the KDDI (au) network, Japan's second-largest operator — an important detail we'll explore below.
Our review of Saily for Japan: the positives
Let's be honest: Saily has genuine strengths, and it's easy to see why it attracts many travelers. Here's what works well.
Among the lowest prices on the market
This is Saily's number one selling point, and it's hard to argue with. Here are the Japan rates in 2026:
- 1 GB / 7 days: $3.99
- 3 GB / 30 days: $7.99
- 5 GB / 30 days: $10.99
- 10 GB / 30 days: $17.99
- 20 GB / 30 days: $24.99 (about $1.25/GB)
On the 20 GB plan, Saily offers one of the best per-GB prices on the market. If you're on a very tight budget and every dollar counts, that's a compelling argument.
Built-in security (VPN + ad blocker)
Thanks to NordVPN, Saily includes a VPN directly in the app. This is a real plus for:
- Connecting to public Wi-Fi (train stations, airports, Starbucks)
- Protecting banking data when booking online from Japan
- Accessing your home country streaming services (though not 100% guaranteed)
Most competitors don't offer this level of built-in security. It's a genuine advantage for privacy-conscious travelers.
A well-designed app
The Saily app is modern, intuitive and well-designed. Purchasing a plan, installing the eSIM and tracking your data usage takes just a few taps. The interface is reminiscent of NordVPN — clean, clear and no-nonsense.
Customer support is accessible 24/7 via in-app chat. Agents typically respond within minutes, which is above market average.
Unrestricted hotspot
Unlike some competitors like Holafly (hotspot limited to 500 MB/day), Saily allows unrestricted tethering on all its plans. If you're traveling as a couple or need to connect a laptop, this matters.
5G compatibility
Saily supports 5G in Japan, delivering significantly faster speeds than 4G in covered areas — primarily Tokyo, Osaka, Nagoya and major metropolitan areas. To learn more about 5G coverage in Japan, check out our guide to 5G coverage in Japan.
Saily Japan review: limitations to know before buying
Despite its strengths, Saily has concrete limitations for a trip to Japan. These are points rarely mentioned in sponsored reviews — but they can make a real difference on the ground.
KDDI network: good in cities, behind Docomo in rural areas
In Japan, three operators share the mobile network:
- NTT Docomo: the most extensive coverage in the country (99.9% of the population), excellent everywhere — rural areas, Shinkansen tunnels, islands and mountains.
- KDDI (au): very good performance in cities, decent in rural areas but inferior to Docomo off the beaten path.
- SoftBank: strong in major cities, significantly weaker elsewhere.
Saily's Japan plans use the KDDI network. It's a better choice than SoftBank, but Docomo remains the reference network for travelers whose itinerary extends beyond major cities. If you plan to visit the Japanese Alps, Shirakawa-go villages, the remote temples of Kii, Hokkaido or the islands of Okinawa, the difference between KDDI and Docomo can be felt in the most isolated areas.
For a trip limited to Tokyo, Osaka and Kyoto, KDDI provides perfectly adequate coverage. The question mainly arises for rural itineraries.
No truly unlimited plan
Saily offers plans labeled "unlimited," but they operate with a fair use policy: you get a daily high-speed data quota (about 5 GB), after which speeds are throttled to between 1 kbps and 1 Mbps. In practice, 1 kbps is unusable — even sending a text message becomes painfully slow.
This isn't "unlimited" data in the way most travelers understand it. It's a plan with a disguised speed cap. Prices for these "unlimited" plans range from $18.99 to $71.99 depending on duration — and when compared to a truly unlimited plan without severe throttling, the value proposition is far less attractive.
If you're a heavy data user (streaming, remote work, family hotspot), this throttling can seriously impact your experience.
Limited data cap on standard plans
Saily's largest Japan plan (excluding throttled "unlimited") is 20 GB for 30 days. For many travelers, that's insufficient for a trip of 2 weeks or more.
For reference, the average active traveler in Japan uses between 1.5 and 2.5 GB per day (Maps navigation, social media, photos, some video calls). Over 14 days, that's 21 to 35 GB — already above Saily's maximum cap.
English-only support
Saily does not offer multilingual customer support beyond English. The in-app chat and emails are in English only. If you're comfortable with English, this isn't an obstacle. But when your eSIM refuses to activate at Narita Airport at 11 PM after a 12-hour flight, being able to explain the issue in your native language makes a real difference.
IP address routed through Hong Kong
Like other eSIM resellers, Saily routes traffic through intermediary servers — in this case, Hong Kong. Your IP address won't be Japanese. The potential consequences:
- Some Japanese services (local streaming platforms, reservation apps) may detect a non-Japanese IP and block access
- Google results may be geolocated to Hong Kong rather than Japan
- ChatGPT and some AI services may be unavailable or limited from a Hong Kong IP
Saily's built-in VPN can theoretically work around this, but it adds a layer of complexity most travelers would rather avoid.
Saily vs PlanJapan: which eSIM to choose for Japan?
To help you decide, here's an objective comparison between Saily and PlanJapan on the criteria that matter for a trip to Japan:
| Criteria | Saily | PlanJapan |
|---|---|---|
| Network | KDDI (au) | NTT Docomo |
| Rural coverage | Good in cities, decent in countryside | 99.9% population, excellent everywhere |
| Max plan (fixed data) | 20 GB / 30 days (~$25) | 50 GB / 30 days |
| Unlimited plan | With throttling (1 kbps-1 Mbps after 5 GB/day) | True unlimited (FUP at 6 GB / 2 days, restored within 24h) |
| 5G | Yes | Yes |
| Hotspot / tethering | Yes, unrestricted | Yes, unrestricted |
| Multilingual support | No (English only) | Yes — EN, FR, ES |
| Local Japanese IP | No (Hong Kong) | Yes |
| Built-in security | VPN + ad blocker (NordVPN) | No (third-party VPN recommended) |
| Specialization | Generalist (150+ countries) | Japan specialist |
| Activation | QR code via app, 2-5 min | QR code by email, 2 min |
| Shinkansen coverage | Good (KDDI) | Complete (Docomo, including tunnels) |
The verdict is nuanced. Saily is a good product with attractive prices and a real security bonus. But for Japan specifically, PlanJapan offers superior network coverage (Docomo vs KDDI), more generous plans (50 GB and true unlimited), multilingual support and a native Japanese IP. The question is: which criteria matters most for your trip?
For a broader comparison including other providers (Airalo, Holafly, Ubigi, MobiMatter), check our guide to the best eSIM for Japan in 2026.
Which Saily plan to choose if you go with Saily?
If, after weighing the pros and cons, you decide to use Saily for Japan, here are our recommendations by traveler profile:
Short stay (3 to 5 days) in Tokyo
The 5 GB / 30 days at $10.99 plan is a good entry point. For moderate use (Maps, messaging, a few searches), it's sufficient. The price is unbeatable for a short city trip.
One-week stay (Tokyo + Kyoto + Osaka)
Go for the 10 GB / 30 days at $17.99. With standard usage (Maps navigation, Instagram, WhatsApp), 10 GB will last the week if you avoid video streaming and large photo uploads.
Stay of 2 weeks or more
Take the 20 GB / 30 days at $24.99. But beware: with normal usage of 1.5 to 2.5 GB per day, you risk exceeding 20 GB before the end of your trip. There's no 50 GB plan at Saily, which means you'll either need to top up (more expensive per GB) or restrict your usage. At this point, a 50 GB plan from PlanJapan will likely be more suitable — and more cost-effective in the end.
Itinerary including rural areas
Regardless of the plan, keep in mind that KDDI coverage is good but not at Docomo's level in Japan's most remote areas. If your itinerary includes Hokkaido outside of Sapporo, deep Tohoku, the Japanese Alps or the smaller islands of Okinawa, an eSIM on the NTT Docomo network will provide greater peace of mind.
Frequently asked questions about Saily in Japan
Does Saily work well in Japan?
Yes, Saily works in Japan on the KDDI (au) network, the country's second-largest operator. The connection is reliable in major cities (Tokyo, Osaka, Kyoto, Nagoya) and most tourist areas. Users report speeds of 50 to 80 Mbps in 4G/5G in urban centers. However, some travelers have reported occasional drops in covered areas (restaurants, basements) and in isolated rural zones.
Is Saily safe and reliable?
Saily is developed by Nord Security, the company behind NordVPN — one of the most reputable cybersecurity companies in the world. The app includes a VPN and ad blocker. It's one of the most reliable eSIM providers in terms of data security. However, "safe" in terms of security doesn't necessarily mean "best" in terms of network coverage — those are two different things.
How much does a Saily plan for Japan cost?
Saily plans for Japan range from $3.99 (1 GB / 7 days) to $24.99 (20 GB / 30 days). The "unlimited" plans range from $18.99 to $71.99 depending on duration, but note: speeds are throttled after a certain daily quota (about 5 GB).
Does Saily offer multilingual support?
No. Saily support is available in English only, via an in-app chat (24/7) and email. Agents respond quickly, but all communication is in English. If you prefer support in your language, PlanJapan offers assistance in English, French and Spanish.
Is my iPhone compatible with Saily?
All iPhones since the XS (2018) are eSIM-compatible and work with Saily. This includes the iPhone 11, 12, 13, 14, 15, 16, 17, and the SE 2nd and 3rd generation. To check, go to Settings > General > About and look for an EID number. Most Samsung Galaxy (S21 and newer) and Google Pixel (3a and newer) are also compatible.
What's the difference between Saily and PlanJapan?
Saily is a generalist reseller (150+ countries) created by NordVPN, using the KDDI network in Japan, with a maximum of 20 GB in fixed data and English-only support. PlanJapan is a Japan specialist, using the NTT Docomo network (best national coverage), with plans up to 50 GB and a truly unlimited option without severe throttling, a native Japanese IP, unrestricted hotspot and multilingual support.
Our recommendation
Saily is a serious provider, backed by a trusted brand (NordVPN), with competitive prices and security features that competitors don't offer. If you're looking for a cheap eSIM for a few days in Tokyo on a tight budget, Saily does the job honestly.
But for Japan specifically, its limitations are concrete: no truly unlimited plan (severe throttling), 20 GB cap on standard plans, KDDI network (good but not at Docomo's level in rural areas), IP routed through Hong Kong and English-only support.
For a trip of 2 weeks or more, an itinerary that goes beyond major cities, or simply the peace of mind of reliable coverage everywhere in Japan, a PlanJapan eSIM on the NTT Docomo network remains our recommendation. You get plans up to 50 GB (or unlimited without throttling), unrestricted hotspot, a Japanese IP, 2-minute activation by QR code and multilingual support.
The Docomo network covers 99.9% of Japan's population — from Shinkansen tunnels to Tohoku villages to the beaches of Okinawa. It's this coverage that makes the difference between a connected trip and a trip where you're desperately searching for Wi-Fi in a konbini.