An eSIM (embedded SIM) is a digital SIM card built into your smartphone that lets you activate a Japan mobile data plan without inserting a physical card. Japan Wireless eSIM connects directly to NTT Docomo and au KDDI networks, giving you 5G/4G data from the moment you land at Narita, Haneda, or Kansai airports. Plans range from 1-day to 30-day options starting at $2/day, delivered instantly as a QR code to your email — no store visit or mail delivery required.

How do I activate an eSIM?

After purchasing your Japan Wireless eSIM, check your email for a QR code (usually arrives within 2 minutes). On your phone, go to Settings > Cellular > Add eSIM and scan the QR code while connected to WiFi. Follow the on-screen prompts to install the plan. Activate the eSIM after landing in Japan — the validity period starts immediately upon activation, so it is best to wait until you arrive. Full setup guides for iPhone and Android are available at japan-wireless.com/esim/setup-esim-iphone-android-guide.

When can I activate my eSIM?

Please activate your eSIM in Japan since the validity period starts once your eSIM is activated regardless of your location. You will need a WiFi connection on your phone to activate an eSIM. We recommend scanning the QR code at home before you travel so you are ready to enable data as soon as you land — the plan only starts counting when you first use data in Japan.

What should I do if my QR code is not working?

eSIM QR codes can only be scanned once. If scanning fails, check your activation status in the My eSIM section under Purchased. If the eSIM shows as not yet activated, use the manual installation option: go to Settings > Cellular > Add eSIM > Enter Details Manually and input the SM-DP+ address and activation code shown in your order email. Full manual setup guides for iOS and Android are at japan-wireless.com/esim/setup-esim-iphone-android-guide. If you still have trouble, Japan Wireless offers 7-day English phone and email support from Japan.

Can I cancel my order?

You cannot cancel your order once you have purchased a data plan, even if you have not activated your eSIM yet. However, if your eSIM fails to activate or does not work as expected, Japan Wireless offers a backup guarantee: a free Pocket WiFi device will be provided as a replacement. This Plan B guarantee ensures you are never left without connectivity in Japan.

日本覆盖範圍

無限日本eSIM

Name: Japan Wireless Unlimited eSIM
Brand: Japan Wireless
SKU: JW-ESIM-UNLIMITED
Availability: InStock
Rating: 4.93 (22463 reviews)

5G速度。本地支援。無憂無慮

真正無限高速
由日本頂級網路提供支援
日本英語支援,每週7天

購買您的eSIM

無限日本eSIM

5G速度。本地支援。無憂無慮

Plans from $2/day · Instant QR delivery

真正無限高速

由日本頂級網路提供支援

日本英語支援,每週7天

購買您的eSIM

Japan Wireless eSIM — Unlimited 5G connectivity for Japan travelers

真正無限

高速網路

99%覆蓋率

日本頂級網路

1.6M+

自2012年以來為無數旅客提供服務

立即購買

Affiliates 服務條款與條件會員條款隱私權政策法律規範關於我們常見問題聯繫我們

日本覆盖範圍

無限日本eSIM

5G速度。本地支援。無憂無慮

真正無限高速
由日本頂級網路提供支援
日本英語支援,每週7天

購買您的eSIM

無限日本eSIM

5G速度。本地支援。無憂無慮

Plans from $2/day · Instant QR delivery

真正無限高速

由日本頂級網路提供支援

日本英語支援,每週7天

購買您的eSIM

真正無限

高速網路

99%覆蓋率

日本頂級網路

1.6M+

自2012年以來為無數旅客提供服務

為什麼選擇日本eSIM

本地與全球供應商

	Japan Wireless (本地)	全球市場
網路存取	直接使用日本頂級5G/4G網路；用於地圖和應用程式的本地IP	通常會經過其他國家路由，這可能會導致延遲並限制對日本應用程式的存取
支援	日本提供每週7天的英語支援	僅限離岸/聊天；時區延遲很常見
無限清晰	價格透明公開：全方案皆清晰標示「不限速吃到飽」或「固定流量」，絕無隱藏限制。	「無限」通常在細則中隱藏每日流量上限或節流
備用選項	如果eSIM失敗，可免費使用隨身 Wi-Fi 機	通常沒有現場後備方案
往績記錄	為超過160萬名日本旅客提供服務	全球規模，較少日本專業化

您在日本的旅遊夥伴

在您旅程的每一天，我們都會支持您

無憂抵達

即時QR交付，清晰的設定，頂級的日本網路。為您一生一次的旅行提供最好的服務。

真正的幫助，真正的人

透過聊天、電子郵件和電話每週7天在日本提供英語支援

B計畫由我們承擔

如果您的eSIM在引導檢查後因任何原因無法連接，我們將免費提供一個袖珍WiFi。

選擇最適合您的 eSIM 方案

查看所有方案

三步即可開通eSIM！

檢查裝置相容性

確認您的裝置是否支援 eSIM

立刻購買

選擇符合您需求的eSIM數據方案並完成購買。下單後您將立即收到eSIM的QR Code。

立即購買

安裝您的日本 eSIM

僅需通過掃描QR Code安裝您的eSIM。所有説明將會通過電子郵件寄送。立刻在日本使用eSIM瀏覽網絡！

安裝並啟用您的eSIM

每一步都有來自日本的支援

STEP 1

購買前

設備檢查，方案建議

STEP 2

設定期間

逐步指南；我們將全程陪伴您直到連線成功

查看設定指南

STEP 3

旅途中

數據/漫遊提示，APN調整，即時覆蓋範圍和數據使用情況檢查

立即聊天

STEP 4

之後

如果計畫變更，可提供收據、退款或積分

聯絡支援人員

我們的客戶怎麼說

日本真實旅客。已驗證評論

Freddy Verheyen

Perfect service! Thanks....Perfect service! Thanks....4 days ago

Guest Guest

Really useful and powerful ...Really useful and powerful ...4 days ago

Guest Guest

It worked great especially in mountain areas....It worked great especially in mountain areas....4 days ago

Guest Guest

Forget about international roaming ...The eSIM from Japan Wireless gets you seamless data and strong connections throughout metropolitan Tokyo even on the subways. Set up is easy for someo...4 days ago

Guest Guest

Seamless… worked well...Seamless… worked well...5 days ago

Mark D

Excellent service...Excellent service at a reasonable rate....10 days ago

Eugene Suh

Great coverage...I rented a car and traveled from Tokyo to the mountains of Nagano, down to Osaka and through Shizuoka and back to Tokyo. During my travel in Japan I ...15 days ago

Alison Jones

Worked no problems very happy ...Worked no problems very happy ...15 days ago

TJ L'Heureux

Have used Japan Wireless on two trips to the country and hav...Have used Japan Wireless on two trips to the country and have been satisfied with the ease of purchase and the quality of service. Thanks!...22 days ago

查看更多評論

常見問題

覆蓋日本全境

使用我們的eSIM在日本隨時享受網路服務。您可以保留原本的運營商SIM卡，並在您的設備上輕鬆雙卡切換，自由漫遊。

立即下單 - 2 分鐘內取得 QR Code

我們的集團服務

為什麼選擇日本eSIM

本地與全球供應商

	Japan Wireless (本地)	全球市場
網路存取	直接使用日本頂級5G/4G網路；用於地圖和應用程式的本地IP	通常會經過其他國家路由，這可能會導致延遲並限制對日本應用程式的存取
支援	日本提供每週7天的英語支援	僅限離岸/聊天；時區延遲很常見
無限清晰	價格透明公開：全方案皆清晰標示「不限速吃到飽」或「固定流量」，絕無隱藏限制。	「無限」通常在細則中隱藏每日流量上限或節流
備用選項	如果eSIM失敗，可免費使用隨身 Wi-Fi 機	通常沒有現場後備方案
往績記錄	為超過160萬名日本旅客提供服務	全球規模，較少日本專業化

您在日本的旅遊夥伴

在您旅程的每一天，我們都會支持您

無憂抵達

即時QR交付，清晰的設定，頂級的日本網路。為您一生一次的旅行提供最好的服務。

真正的幫助，真正的人

透過聊天、電子郵件和電話每週7天在日本提供英語支援

B計畫由我們承擔

如果您的eSIM在引導檢查後因任何原因無法連接，我們將免費提供一個袖珍WiFi。

選擇最適合您的 eSIM 方案

查看所有方案

三步即可開通eSIM！

檢查裝置相容性

確認您的裝置是否支援 eSIM

立刻購買

選擇符合您需求的eSIM數據方案並完成購買。下單後您將立即收到eSIM的QR Code。

立即購買

安裝您的日本 eSIM

僅需通過掃描QR Code安裝您的eSIM。所有説明將會通過電子郵件寄送。立刻在日本使用eSIM瀏覽網絡！

安裝並啟用您的eSIM

每一步都有來自日本的支援

STEP 1

購買前

設備檢查，方案建議

STEP 2

設定期間

逐步指南；我們將全程陪伴您直到連線成功

查看設定指南

STEP 3

旅途中

數據/漫遊提示，APN調整，即時覆蓋範圍和數據使用情況檢查

立即聊天

STEP 4

之後

如果計畫變更，可提供收據、退款或積分

聯絡支援人員

我們的客戶怎麼說

日本真實旅客。已驗證評論

Freddy Verheyen

Perfect service! Thanks....Perfect service! Thanks....4 days ago

Guest Guest

Really useful and powerful ...Really useful and powerful ...4 days ago

Guest Guest

It worked great especially in mountain areas....It worked great especially in mountain areas....4 days ago

Guest Guest

Seamless… worked well...Seamless… worked well...5 days ago

Mark D

Excellent service...Excellent service at a reasonable rate....10 days ago

Eugene Suh

Great coverage...I rented a car and traveled from Tokyo to the mountains of Nagano, down to Osaka and through Shizuoka and back to Tokyo. During my travel in Japan I ...15 days ago

Alison Jones

Worked no problems very happy ...Worked no problems very happy ...15 days ago

TJ L'Heureux