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UncleSim Pro

Japan (KDDI) Travel eSIM (2GB/Day 4G/5G + Unlimited 5Mbps)

Japan (KDDI) Travel eSIM (2GB/Day 4G/5G + Unlimited 5Mbps)

Regular price ¥49.00 CNY
Regular price Sale price ¥49.00 CNY
Sale Sold out
Taxes included. Shipping calculated at checkout.
Travel Duration (Days)
Quantity
Japan Nationwide eSIM
✓ KDDI 5G/4G · Full Speed Unlimited

Best Japan Travel eSIM
Unlimited Full-Speed 5G/4G KDDI Nationwide Roaming

High-speed 5G/4G prepaid travel eSIM for Japan powered by KDDI (au). Enjoy full-speed unlimited data with zero speed throttling on mobile phone across Tokyo, Osaka, Kyoto, Hokkaido, Fukuoka, and Okinawa. Flexible 1, 3, 5, 7, 10, 15, 20, and 31-day options.

No Throttling
Full-Speed Phone Unlimited
KDDI 5G/4G au
Premier National Tier-1 Signal
Flexible Durations
1, 3, 5, 7, 10, 15, 20, 31 Days
Hotspot Sharing
Dedicated High-Speed Quotas
Date Reset Time
00:00 (UTC+9)
Japan Time (UTC+9)
Activation Window
150 Days
From QR Redemption
Installation
One-Time
Scan Upon Japan Arrival
Instant Digital Fulfillment: Email Delivery within 12 Hours
Plan Breakdown

Japan Plan Options & Hotspot Limits (1, 3, 5, 7, 10, 15, 20, 31 Days)

Full Speed Unlimited
Plan Duration (天數) Data Speed & Allowance (流量規格) Hotspot Limit (熱點限制)
1 Day (1天) Unlimited Data, Full-Speed No Throttling (無限流量,全程高速不降速) Supported (支援分享)
3 Days (3天) Unlimited Data, Full-Speed No Throttling (無限流量,全程高速不降速) 2GB
5 Days (5天) Unlimited Data, Full-Speed No Throttling (無限流量,全程高速不降速) 4GB
7 Days (7天) Unlimited Data, Full-Speed No Throttling (無限流量,全程高速不降速) 6GB
10 Days (10天) Unlimited Data, Full-Speed No Throttling (無限流量,全程高速不降速) 9GB
15 Days (15天) Unlimited Data, Full-Speed No Throttling (無限流量,全程高速不降速) 14GB
20 Days (20天) Unlimited Data, Full-Speed No Throttling (無限流量,全程高速不降速) 19GB
31 Days (31天) Unlimited Data, Full-Speed No Throttling (無限流量,全程高速不降速) 30GB
Direct Search Hub

Quick Coverage Finder (Japan & Major Destinations)

Site & Google Search Ready
Supported Regions & Top Cities across Japan
Japan (日本)Tokyo / Haneda / Narita (東京 / 羽田 / 成田)Osaka / Kansai (大阪 / 關西)Kyoto (京都)Sapporo / Hokkaido / Niseko (札幌 / 北海道 / 二世谷)Fukuoka / Kyushu (福岡 / 九州)Okinawa / Naha (沖繩 / 那霸)Nagoya (名古屋)Yokohama (橫濱)Kobe (神戶)Hiroshima (廣島)Sendai / Tohoku (仙台 / 東北)Nara (奈良)Hakone / Mount Fuji (箱根 / 富士山)Kanazawa (金澤)

Activation & Installation Notice for Japan

• 150-Day Activation Window:The QR code must be scanned and activated within 150 daysafter redemption (*兌換QR CODE之後150天之內需掃描激活).

• Arrival Activation (One-Time Install):It is recommended to scan and activate the eSIM upon arrival in Japan. (This eSIM supports one-time installation only) / *建議抵達日本當地後再掃描激活(此eSIM只能安装一次)。

Compatibility Guide

Check if Your Phone Supports eSIM

10-Second Check
Fast Dial Code (Universal)
Open your phone app and dial *#06#. If an "EID"barcode or 32-digit number appears, your device hardware supports eSIM!
Apple iPhone Verification
Go to SettingsCellular. If you see the option "Add eSIM"or "Add Cellular Plan", your iPhone is eSIM ready.
Samsung & Android Verification
Go to SettingsConnectionsSIM Manager. Look for "Add eSIM"or a [+]button to download a profile.
Important Device Notice:Your phone must be carrier-unlocked (SIM-lock free). (Note: Dual-physical SIM iPhones manufactured for Mainland China, Hong Kong, and Macau do not support eSIM).
Easy Setup Process

How to Order, Redeem & Activate Your Japan eSIM

1
Select Travel Plan Duration (1, 3, 5, 7, 10, 15, 20, 31 Days)
Choose your required duration (1, 3, 5, 7, 10, 15, 20, or 31 Days) and complete checkout online.
2
Receive Your Email Voucher within 12 Hours
Check your inbox for our confirmation email containing your unique Redemption Code (Valid for 18 monthsfrom purchase).
3
Redeem & Retrieve QR Code (Valid for 150 Days)
Visit the exchange portal to input your voucher code and generate your eSIM QR profile. Ensure activation within 150 days of redemption.
4
Scan Upon Arrival in Japan & Enable Roaming
Upon landing in Japan, scan your QR code on airport Wi-Fi (one-time install), set it as Mobile Data, and toggle Data Roamingto ON!
Redemption Portal:https://esimexchange.com/
(Enter your email voucher code to retrieve your Japan QR profile)
Carrier Directory

Carrier Specs by Destination (Japan)

Click to View Complete Network Breakdown for Japan (5G / 4G)
Region / Territory Operator(s) Speed
1. Japan (日本) KDDI (au) 5G/4G
Got Questions?

Frequently Asked Questions

How do date duration and daily data resets work?

• Date reset:00:00 Japan Time (UTC+9) / 日期重置:日本時間 00:00 (UTC+9)。
• Data reset:00:00 Japan Time (UTC+9) / 流量重置:日本時間 00:00 (UTC+9)。

What are the hotspot data allowances for each option?

Phone data is 100% unlimited at full speed with no throttling. Dedicated hotspot allowances are: 3 Days (2GB), 5 Days (4GB), 7 Days (6GB), 10 Days (9GB), 15 Days (14GB), 20 Days (19GB), and 31 Days (30GB).

When should I scan and install this eSIM?

It is strongly recommended to scan and install your eSIM upon arrival in Japan using airport Wi-Fi. This eSIM profile supports one-time installation onlyand cannot be re-scanned or transferred if deleted.

Important Precautions for Your Japan eSIM

18-Month Code Validity:The digital redemption code received in your email is valid for 18 months from issuance date.
150-Day Activation Window (150天激活規範):The QR code must be scanned and activated within 150 days after redemption (*兌換QR CODE之後150天之內需掃描激活).
Arrival Scan Recommended (抵達當地激活):It is recommended to scan and activate the eSIM upon arrival in Japan (*建議抵達日本當地後再掃描激活).
Single One-Time Install (只能安裝一次):This eSIM supports one-time installation only and cannot be re-installed (*此eSIM只能安装一次).
Date & Data Reset (時間重置):Resets daily at 00:00 Japan Time / UTC+9 (日本時間 00:00 UTC+9).
Quick Device Installation

iOS & Android Configuration Guide

Apple iPhone Setup
iOS Guide
Phase 1: Before You Fly (At Home / Wi-Fi)
1. Redeem QR:Visit https://esimexchange.com/and save your Japan QR code.
Scan upon arrival at the airport in Japan to ensure one-time installation success.
Phase 2: After Landing in Japan
1. Scan QR:Go to SettingsCellulartap Add eSIMscan your QR.
2. Enable Line:Turn ONthis travel eSIM line and label it as [Secondary].
3. Switch Data:Set Cellular Datato [Secondary].
4. Roaming On:Toggle Data Roamingto ON.
✓ Keep "Allow Cellular Data Switching" turned OFF.
Android Setup
Samsung / Pixel / Unlocked
Phase 1: Before You Fly (At Home / Wi-Fi)
1. Redeem QR:Visit https://esimexchange.com/and save your Japan QR code.
Scan upon arrival at the airport in Japan to ensure one-time installation success.
Phase 2: After Landing in Japan
1. Download Profile:Go to SettingsConnectionsSIM Managertap [+] Add eSIMscan QR.
2. Activate Line:Turn ONthe Japan travel eSIM profile.
3. Set Mobile Data:Set the travel eSIM as your preferred Mobile DataSIM.
4. Enable Roaming:Enable Data Roamingin Mobile Network settings.
Post-Trip eSIM Removal Steps:
• For Apple iOS:Settings Cellular Select Travel eSIM Turn off line Delete eSIM.
• For Android:Settings Connections SIM Manager Select Travel eSIM Remove / Clear eSIM.
Technical Support: Contact our customer support team for activation assistance.
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