渡航先 地域eSIM
地域2エリア

Japan & South Korea eSIM

1日無制限 2エリア すべての国を見る

Japan & South Koreaで使えるモバイルデータ。ローミング料金なし、すぐに開通、iPhone・Samsung・Androidにワンタップでインストール。

30日間返金保証 Trustpilotで優良と評価
今すぐ始める
  1. 01到着後すぐにインターネット
  2. 02SIMの差し替え不要 — 電話番号はそのまま
  3. 03出発前に1分以内で設定完了

無制限プランを選ぶ

期間限定セール 選択中 1日間 $6.50 $5.99
  • 3G/4G/5G ネットワーク速度
  • 必要なときにいつでもチャージ
  • 即時開通・テザリング対応
  • 24時間年中無休サポート・契約不要
日数
1 日数
$2.49
  • 24時間ごとに高速データ1 GB
  • データ無制限（高速データ消費後は最低512 Kbps）
  • 3G/4G/5G · 即時アクティベーション · テザリング対応
  • 24時間年中無休サポート・契約不要

Japan & South Korea eSIMの全プランと料金

USD · 1GBあたりの価格は四捨五入 ·
データ 有効期間 価格 1GBあたり
1日1 GB 1日無制限 $2.49 / 日 —
1日2 GB 1日無制限 $4.49 / 日 —
1日3 GB 1日無制限 $5.99 / 日 —
1日5 GB 1日無制限 $7.49 / 日 —
1日10 GB 1日無制限 $12.99 / 日 —

Japan & South Korea eSIMはどのプランを選べばいい？

  • 毎日の動画視聴とテザリング 1日無制限
    $2.49 / 日から

ご利用の流れ

  1. ステップ01 プランを選ぶ 旅行に合ったデータ量と有効期間を選びます。
  2. ステップ02 注文メールを受け取る eSIMはすぐにメールで届きます。
  3. ステップ03 ワンタップでインストール インストールをタップし、到着したらデータ通信をオンにします。

対応エリア

  • Japan KDDI/au 5G, SoftBank 5G
  • South Korea SKTelecom 5G, LG Uplus 5G

さらに広いエリアが必要ですか？

よくある質問

How does an eSIM help with sightseeing in Japan & South Korea?

You roll your suitcase through Haneda Airport arrivals and open Google Maps for the train route into Tokyo, passing the SIM counter instead of joining its queue. The route shows your platform and transfer, so you head straight for the ticket machines. In Asakusa, you follow the map toward Senso-ji, then duck into a small restaurant where Google Translate helps you read the specials on the wall.

After lunch, you book admission to Tokyo Skytree and pull up the confirmation as you walk toward the entrance. You send a photo of the skyline home through LINE, then use Uber to arrange a ride back to your hotel. When you would rather eat in than head out again, you browse Uber Eats and choose dinner without leaving your room.

What should tourists compare in an eSIM for Japan & South Korea?

For a Japan & South Korea itinerary, look for one regional package covering both countries, clear allowance renewal terms, and validity that matches your booking. This plan covers Japan & South Korea, so crossing between them does not require buying a separate country plan.

The allowance is recurring, not one shared pool for the entire trip. The data amount and validity depend on the package you choose. Compare those details in the plan picker, along with your device’s eSIM compatibility and whether it is unlocked for use with another provider. If you need a further allowance beyond your purchase, buy a new plan.

Where is eSIM coverage strongest across Japan & South Korea?

Your eSIM connects to supported local networks including KDDI/au, SoftBank, SKTelecom, LG Uplus, with 3G/4G/5G service across Japan & South Korea. Coverage is strongest in cities and main tourist areas such as Tokyo, Kyoto, Osaka, Seoul and Busan. Connections are patchier in the Japanese Alps, on remote Japanese islands and in South Korea’s mountain interiors, where terrain separates settlements and transport routes.

SimSwift eSIMLocal SIMRoaming
SetupInstall at home before flyingFind a shop or airport kiosk and queue after landingNothing to install; enable roaming
When you're connectedOn landing when connected to a supported networkAfter purchase and setupOn landing if your home plan includes destination roaming
Paperwork / IDNo paperwork or ID submissionID may be requested at the counterExisting home account; no new registration
Cost predictabilityPay once upfrontChoose from local offers after arrivalIncluded allowance or additional charges depend on your home plan
WhatsApp & your numberKeep using WhatsApp on your home numberNew local number; WhatsApp stays on your home numberYour home number, on your home plan's roaming terms
Top-upsBuy a new plan if you need more dataPurchase another allowance through the provider or a shopExtra data depends on your home plan

What phone essentials should I pack for Japan & South Korea?

  • Download NAVER Map before exploring South Korea; save your accommodation in the app so you can find it without retyping the address.
  • Save offline Google Maps areas for Japan, plus screenshots of station exits and hotel directions.
  • Pack an adapter for Japan’s Type A sockets and South Korea’s Type C or F sockets; check your charger supports both voltages.
  • Carry a physical payment card and cash in Japan & South Korea; do not rely entirely on a mobile wallet.
  • Keep your phone silent on trains in Japan and South Korea, and move aside before stopping to study directions.
  • Carry a charged power bank for photographing Kyoto’s temples or navigating Seoul’s steep neighbourhood streets.

Japan & South Korea eSIMの料金はいくらですか？

SimSwiftのJapan & South Korea無制限デイリープランは1日$2.49からです。

Japan & South Korea eSIMはいつ有効になりますか？

It activates when you connect to a supported network in Japan & South Korea (usually upon arrival). No manual activation needed—just land, turn on your phone, and you're connected.

eSIMはどのように機能しますか？

An eSIM is a digital SIM built into your phone that activates mobile data without a physical card. After purchase, you install the Japan & South Korea eSIM in one tap from your order email. Once you arrive in Japan & South Korea, your phone connects to local networks automatically—no SIM swaps or roaming fees.

iPhoneにJapan & South Korea eSIMをインストールするには？

Open your order email on your iPhone and tap the install button: the eSIM installs in one tap, then follow the prompts. Once installed, select the eSIM as your data line. You'll need to enable Data Roaming on the eSIM line (not your primary SIM) to connect in Japan & South Korea.

AndroidにJapan & South Korea eSIMをインストールするには？

Open your order email on your Samsung, Pixel or other eSIM phone and tap the install button: the eSIM installs in one tap. Set the eSIM as your data line and enable Data Roaming on the eSIM profile to use mobile data in Japan & South Korea.

How do I activate my eSIM at airports in Japan & South Korea?

At home, install in one tap from your order email before flying; keep the line off until landing at Haneda Airport or Incheon International Airport. Enable the line and data roaming; it connects automatically to a supported network. You have 180 days from purchase to activate.

Japan & South Korea eSIMではデータローミングをオンにする必要がありますか？

Yes, enable Data Roaming on the eSIM line (not your primary SIM). This allows the eSIM to connect to local networks in Japan & South Korea. You won't be charged roaming fees—it connects as a local plan with no extra charges from your home carrier.

Can I share eSIM data while sightseeing in Japan & South Korea?

Yes, hotspot and tethering work on most plans. Share your connection with a companion while exploring the Jeju Olle Trail so they can view the route on their own device.

データ専用eSIMでWhatsAppは使えますか？

Yes! WhatsApp and iMessage stay linked to your home number. The Japan & South Korea eSIM is data-only, so your existing messaging apps work perfectly—you keep all your chats and contacts.

データ専用eSIMで通話はできますか？

This eSIM doesn't include a phone number for regular calls/SMS. However, you can make calls using WhatsApp, FaceTime, Skype, or other internet-based apps over your data connection.

Japan & South Korea eSIMは購入後いつまで有効ですか？

You have 180 days from purchase to activate your Japan & South Korea eSIM. Once activated, the plan validity depends on the package you chose (shown on the product page).

Japan & South Korea eSIMはチャージできますか？

Yes! All fixed data plans support instant top-ups. Purchase a top-up package using your original eSIM reference number—no new eSIM to install.
Japan & South Korea · 地域eSIM プランを読み込み中... 上のプランを選択してください
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