Who is the Japan Unlimited 5G eSIM | KDDI & DOCOMO for?

Choose a high-speed unlimited Japan eSIM on AU KDDI 4G/5G or DOCOMO. Native Japan IP, hotspot support, and instant digital QR delivery.

How do I install this Japan eSIM?

After payment, open the QR code from your email or account. Add a new eSIM in your phone's cellular settings, scan the code, and enable the plan when you need data.

How quickly is the eSIM delivered?

The QR code is normally delivered by email within about five minutes after checkout.

Can I return or exchange the plan?

Eligibility depends on whether the digital eSIM has been installed or activated. Review the Jeko eSIM refund policy before purchase.

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Plan information

FUP

Fair Use Policy (FUP): Genuinely unlimited data without intentional throttling. Plans of 10 days or longer require manual APN setup; follow the purchase reminder to complete the settings.

Activation reminder

Note

We recommend installing and setting up the eSIM before departure, then activating it after arrival.

We recommend installing/activating the eSIM after arriving in Japan; plans of 10 days or longer require manual APN setup.

View activation guide

AU (KDDI)5G真・without throttlingFUP

Japan Unlimited 4G/5G eSIM

In stock4.9(247 reviews)

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Looking for unlimited Japan eSIM that is truly uncapped with 5G? AU (KDDI) truly unlimited uses native Japan 4G/5G and a Japan IP—ideal for deep Tokyo/Osaka/Kyoto trips with all-day maps, hotspot, and video without tracking data.
Why choose AU KDDI truly uncapped?
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Why it's easier: No physical SIM swap—scan a QR and keep high-speed all day without watching daily/total caps.
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Truly uncapped unlimited: High-speed data is unlimited (not locked to ); actual speed depends on location and network conditions.
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Native Japan IP + 5G/4G: Stable coverage in popular cities and transit corridors; exit is not CN/HK—use with confidence.
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APN tip: Usually automatic; plans of 10 days or more may need manual APN as reminded at purchase.
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Hotspot + popular apps: Hotspot, ChatGPT, TikTok, Gemini, and similar apps are supported.
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Who should choose what: Choose this for truly uncapped speed, hotspot, and video; for better value pick AU KDDI unlimited; for Docomo coverage pick IIJ Docomo daily or DOCOMO total; if you know total usage pick AU KDDI total.
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Activation tip: Install/enable in coverage in Japan; complete APN setup on longer plans.

Real-world experience

Editor field test: in Fukuoka / Kyushu / Kumamoto city areas speeds can reach 600 Mbps up; business districts often hit about 100–200 Mbps. Airports, downtown, hotel indoors, signal-blocked spots, and crowded areas can all affect real-world speed. For reference only; not a guaranteed speed for every traveler.

Choose your plan：AU(KDDI) 真。unlimitedwith no speed reduction · Native Japan IP · local tower network · traffic does not route via China · more secure connection · use with confidence

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Japan Unlimited 4G/5G eSIM

High-speed unlimited data on AU KDDI or DOCOMO | Native Japan IP

AU(KDDI) 真。unlimitedwith no speed reduction · Native Japan IP · local tower network · traffic does not route via China · more secure connection · use with confidence

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Service & assurance

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Fast digital delivery
Your eSIM QR code is delivered by email after purchase
Clear refund policy
Eligibility depends on installation and activation status
Reliable networks
Service through established mobile network operators
Customer support
Get assistance through our official LINE support

Payment methods

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Japan network coverage guide

Check the selected carrier's coverage before purchasing your eSIM. Reception is generally strongest in major cities and along main transport routes. Coverage may be weaker in remote areas, mountains, ski resorts, islands, underground spaces, and large buildings.

Japan mobile network coverage heatmap preview — Open the preview above to explore the nPerf Japan coverage map. Denser areas generally indicate more reported coverage. Remote and mountainous areas may have fewer reports. Use the carrier links below to check the network included with your plan.

Mobile carrier overview

Select a carrier to open its nPerf coverage map.

Coverage resources

Coverage maps are provided by carriers and third parties and may change without notice. They are for travel planning only and do not guarantee speed or signal strength at a specific location. Your actual network depends on the selected eSIM plan.

About Japan Unlimited 4G/5G eSIM

Plan details

Coverage

Cities and travel destinations throughout Japan, including Tokyo, Kyoto, Hiroshima, the Kanto region, Nagasaki, and Osaka.

Carrier

KDDI 5G

Speed

4G/LTE/5G; genuinely unlimited high-speed data (actual speed depends on location and network conditions)

Plan type

Data only - unlimited without intentional throttling (local network)

Tethering / hotspot

Supported

Phone number

None

Calls

Not supported; calls are available only through apps using internet calling (VoIP).

SMS

None

eKYC (identity verification)

Not required

Delivery

The eSIM QR code will be emailed to you within a few minutes after payment is completed.

Data routing

Local (Japan IP)

Top-up option

None

Validity policy

The validity period starts once the eSIM connects to a supported network and begins using data. We recommend adding the eSIM after arriving at your destination. You may also install the eSIM in advance, but remember to turn it off immediately after installation to prevent the validity period from starting early.

Other information

Important

Once deleted, this eSIM cannot be reinstalled.

Service days

Calculated in Japan time (UTC+9), beginning on the activation date.

APN setup

The APN is configured automatically in most cases. If manual setup is required: APN: uad5gn.au-net.ne.jp Username: [email protected] Password: au Authentication type: CHAP or APN: au.5g.au-net.ne.jp Username: [email protected] Password: au Authentication type: CHAP If you still cannot connect, try this 4G-only configuration: APN: uno.au-net.ne.jp Username: [email protected] Password: KpyrR6BP Authentication type: CHAP

After purchase, please do so within 150 days of purchase to scan the QR code and complete activation.

This eSIM is provided by the local carrier and sold by jeko eSIM as an authorized distributor. Returns and exchanges for digital products are governed by this site's return policy; the issuing carrier may adjust plan details. Thank you for your understanding.

Overview

This plan is provided by au (KDDI), one of Japan's leading carriers. It is especially suitable for frequent visitors and short-term travelers, providing a native Japan IP address and a low-latency connection.

Travelers can activate the eSIM easily by scanning the QR code and connect directly to KDDI's local network. Major cities commonly provide excellent 5G/4G performance, with support for apps including Google, YouTube, Facebook, Instagram, ChatGPT, and TikTok.

This plan provides genuinely unlimited high-speed data (actual speed depends on location and network conditions), making it suitable for streaming, gaming, and heavy data use.

Plan	Description	Hotspot sharing
Total allowance	A fixed high-speed data allowance that remains at high speed until used up.	Hotspot use consumes your total GB allowance, with no additional cap.
Unlimited	Unlimited data at approximately .	The hotspot allowance is approximately the number of plan days minus 1 GB (for example, about 6 GB can be shared on a 7-day plan).
Unlimited without intentional throttling	Genuinely unlimited high-speed data.	The hotspot allowance is likewise approximately the number of plan days minus 1 GB.

For the unlimited plan without intentional throttling, the hotspot allowance is approximately the number of plan days minus 1 GB (for example, about 6 GB for 7 days).

If you are traveling among multiple cities and want the most stable signal, consider the dual-network SoftBank／KDDI。

Which Japan eSIM is best for you?

Product	Carrier	Best for	Benefits and notes
Japan eSIM AU (KDDI) - Unlimited	KDDI single network 5G supported Japan IP Unlimited	Streaming enthusiasts Gamers Heavy data users	Connect to the local KDDI (au) network for a fast, stable connection with a Japan IP. Enjoy unlimited high-speed 5G/4G data (actual speed depends on local conditions). Compatible with apps such as TikTok, ChatGPT, and Google, as well as Japan-only apps such as TVer and U-NEXT. In rare cases, manual APN setup may be required. See AU unlimited without intentional throttling。
Japan eSIM 5G SoftBank / KDDI	Dual SoftBank/KDDI networks	Multi-city travel Users who need network stability	Extensive LTE/5G coverage throughout Japan. Dual-network switching for maximum signal stability. Enjoy a consistent high-speed LTE/5G connection. Suitable for long-term use, with plans of up to 60 days. Cannot access TikTok, ChatGPT, or Japan-only apps such as TVer and U-NEXT.
Japan eSIM IIJ NTT Docomo	Docomo with Japan IP	Access Japan-only content	Includes a genuine low-latency Japan IP address. Full access to TikTok, ChatGPT, and Japan-only apps such as TVer and U-NEXT. Unlimited data at full speed (actual speed depends on local conditions). Limited to the 4G/LTE network; 5G is not supported. Manual APN setup is required (vmobile.jp).

Plan highlights

Network: KDDI (au) 4G/LTE/5G with a native Japan IP
The APN is filled in automatically in most cases; if necessary, configure it manually using the "Other information" instructions
Validity: starts after connecting and beginning to use data; complete activation within 150 days
Data: genuinely unlimited high-speed data without intentional throttling; hotspot allowance is approximately the number of plan days minus 1 GB
Data only: no phone number, traditional calls, or SMS; hotspot, TikTok, ChatGPT, and local apps are supported
It cannot be reinstalled after deletion; do not remove the eSIM unless necessary

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