10 Best eSIM Sellers for Travel to Japan

Staying connected while traveling in Japan is easier than ever with the growing availability of Japan eSIM options. These digital SIMs let travelers activate local data plans instantly, avoiding the hassle of physical SIM cards or costly roaming.

Whether you’re navigating public transport, translating signs, or sharing photos, an eSIM keeps you online throughout your journey.

Providers such as iRoamly travel eSIM now offer flexible plans designed specifically for visitors, giving you reliable coverage from Tokyo to Hokkaido.Next, we will introduce you to the 10 Best eSIMs for Travel to Japan.

1. iRoamly

Japan Plan Pricing:

• 1GB / day: $2.3 ( 2 days)
• 30GB / 30 days: $25.00
• Unlimited option: $2.8 (1 day)

Provider:

• KDDI  / Softbank

Reasons to Buy

• Flexible plan options (daily, total, or unlimited).
• Strong coverage across urban and rural Japan.
• Hotspot sharing is supported.
• Plans from 500MB to unlimited data

Reasons to Avoid

• Slightly higher cost for light users.

Summary

iRoamly travel eSIM is a global travel eSIM provider designed for convenience and flexibility. It emphasizes easy setup, instant activation, and dependable international coverage. Its Japan travel eSIM is tailored for tourists, offering flexible data options, unlimited usage, and smooth network switching.The iRoamly travel eSIM stands out for its versatility, offering flexible pricing tiers and reliable coverage. It’s an ideal choice for travelers seeking simplicity, hotspot capability, and stable data access throughout Japan.

2. Airalo

Japan Plan Pricing

• 1GB / 3 days: $4.00
• 5GB / 30 days: $11.00
• 10GB / 30 days: $18.00

Provider

• SoftBank / KDDI

Reasons to Buy

• Excellent app interface and easy installation.
• Flexible plans at low prices.
• Reliable performance in major Japanese cities.

Reasons to Avoid

• Throttling after reaching data limits.

Summary

Airalo is one of the most recognized eSIM marketplaces, offering local, regional, and global data plans. Its Japan plans are popular among travelers for affordability and ease of use.Airalo’s Japan eSIM offers good value for short trips or light data users. It’s one of the best budget-friendly choices for staying connected across Japan.

3. Ubigi

Japan Plan Pricing

• 1 GB / 30 days: $4
• 3 GB / 15 days: $8
• 10 GB / 30 days: $17
• Unlimited / 7 days: $14

Provider

• KDDI / NTT Docomo

Reasons to Buy

• Excellent coverage via NTT Docomo.
• Offers both limited and unlimited data plans.
• 5G connectivity where available.
  
  

Reasons to Avoid

•  No phone/SMS service.
•  Customer support can be slow.

Summary

Ubigi is a global eSIM provider owned by Transatel, part of Japan’s NTT Group. It partners with NTT Docomo, Japan’s largest mobile operator, ensuring outstanding network quality.It’s partnership with Japan’s largest carrier ensures top reliability. It’s perfect for travelers needing strong coverage and long-stay data options.

4. Saily

Japan Plan Pricing

• 1 GB / 7 days: $3.99
• 5 GB / 30 days: $10.99
• 20 GB / 30 days: $24.99

Provider

• Saily cooperates with local network operators to provide stable and reliable Internet connection.

Reasons to Buy

• Competitive pricing for small data users.
• Easy-to-use app with privacy protection.
• Transparent pricing and coverage.

Reasons to Avoid

•  Limited history compared to older brands.

Summary

Saily is a newer eSIM brand focused on straightforward, affordable data packages with enhanced privacy and network security features.It is ideal for cost-conscious travelers or those taking shorter trips. Its affordable pricing and secure connection make it an excellent modern choice.

5. Holafly

Japan Plan Pricing

• Unlimited data from $3.90/day (multi-day discounts available).

Provider

• KDDI / Softbank

Reasons to Buy

• True unlimited data (subject to fair usage).
• Easy daily-based pricing model.
• Good coverage across Japan.

Reasons to Avoid

•  More expensive for light users.
•  Speeds may slow under fair-use policy.

Summary

Holafly is widely known for its unlimited data eSIMs, catering to tourists who want continuous connectivity without worrying about data caps.For travelers who stream, work remotely, or rely heavily on maps and media, Holafly’s unlimited Japan eSIM offers the most peace of mind.

6. Nomad

Japan Plan Pricing

• 1 GB / 7days: $6
• 3 GB / 30 days:$8
• Unlimited / 7 days: $23

Provider

• KDDI au / SoftBank

Reasons to Buy

• Wide range of plans (up to 50 GB).
• Good app experience and customer support.

Reasons to Avoid

• Slightly pricier for small plans.

Summary

Nomad is a digital-first eSIM provider known for flexible plans and reliable service in Asia. It’s often compared favorably with Airalo for frequent travelers.It suits travelers who need medium to high data volumes with stable connectivity across Japan’s major networks.

7. Jetpac

Japan Plan Pricing

• $1 for 1 GB / 4 days
• $10 for 5 GB / 30 days
• $19.99 for 15 GB / 30 days

Provider:

• KDDI Corporation / Rakuten

Reasons to Buy

• Useful for short-term visitors.
• Travel perks included in some plans.

Reasons to Avoid

•  Limited data options for long stays.

Summary:

Jetpac is a travel-oriented eSIM brand offering not just data but also access to travel rewards, airport lounge benefits, and premium app integrations. It combines travel convenience and connectivity, making it suitable for business travelers or premium tourists seeking extra benefits.

8. GigSky

Japan Plan Pricing

• $4.99 for 1 GB / 7 days
• $10.19 for 3 GB / 15 days
• $16.99 for Unlimited / 3 days

Provider

• Japanese mainstream suppliers

Reasons to Buy

• Reliable global coverage.
• Works well for multi-country Asia trips.

Reasons to Avoid

• Pricier for Japan-only use.
• Smaller data bundles.

Summary

GigSky is one of the earliest global eSIM providers, trusted for international coverage and easy app-based activation.It is ideal for travelers visiting several Asian countries, not just Japan, offering simplicity and stability across regions.

9. World eSIM

Japan Plan Pricing

• 1GB/ day (Valid for one day）： $1.2
• 10 GB / 20days :  $29.7
• Unlimited / 7 days: $29.8

Provider

• Softbank / KDDI

Reasons to Buy

• Multi-country bundles available.
• Suitable for travelers combining Japan with other destinations.

Reasons to Avoid

• Japan-only data is less cost-effective.
• Limited visibility into carrier partners.

Summary

World eSIM acts as an aggregator platform, offering flexible plans across multiple countries, including Japan. World eSIM’s strength lies in flexibility — a good choice if Japan is just one stop on your larger Asia itinerary.

10. Sakura Mobile

Japan Plan Pricing

• 1 GB / 3 days: $13.35
• 5 GB / 3 days: $20.02
• 20 GB / 30 days: $46.39

Provider

• Major Japanese networks

Reasons to Buy

• Operates entirely within Japan — excellent local support.
• Offers both short-term tourist and long-term resident plans.

Reasons to Avoid

• Slightly more expensive than global eSIM competitors like Airalo or Saily.
• Setup may require manual APN configuration on some devices.

Summary

Sakura Mobile is a Japan-based telecommunications provider specializing in SIM cards, pocket Wi-Fi, and eSIM solutions for international travelers and long-term residents.

Unlike most global eSIM brands, Sakura Mobile focuses exclusively on Japan, offering reliable domestic coverage and dedicated English-language support — something particularly valuable for tourists and expatriates unfamiliar with local telecom services.

It’s ideal for visitors who value reliable domestic coverage, transparent pricing, and local assistance.

FAQ

1. Can I buy and activate a Japan eSIM before arriving in Japan?

Yes. Most Japan eSIMs — including iRoamly travel eSIM, Airalo, and Ubigi — can be purchased and activated before departure. However, it’s best to install (scan the QR code) before traveling, but only activate data once you arrive in Japan. This avoids accidentally starting your plan too early..

2. Can I keep my original SIM card while using a Japan eSIM?

Yes. Most modern smartphones support dual SIM (physical + eSIM). You can keep your home number active for calls or texts while using your Japan eSIM for data. Just make sure to disable data roaming on your primary SIM to avoid unexpected charges.

3. What happens if I run out of data during my trip?

Most Japan eSIM providers allow you to top up or extend your plan directly through their app or website. For example, Airalo, Ubigi, and iRoamly travel eSIM support instant top-ups without reinstalling the eSIM. Make sure to check whether your provider offers automatic renewal or manual recharge.

4. Is public Wi-Fi in Japan a good alternative to using an eSIM?

While Japan has free Wi-Fi in airports, hotels, and some cafes, coverage is inconsistent and often requires registration. For reliable, on-the-go connectivity — especially for navigation or translations — a Japan eSIM is far more dependable. It ensures privacy, faster speeds, and stable access anywhere you travel.

Conclusion

With the right eSIM, staying connected throughout Japan becomes seamless, allowing you to focus on the experience rather than the logistics.

Among these ten options, iRoamly and others stand out for their flexibility and coverage.

Choosing the best eSIM for Japan depends on the duration of your trip and your data needs. This will undoubtedly ensure the quality of your trip to Japan.