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地域2エリア

Japan & South Korea eSIM

2エリア すべての国を見る 定額＋デイリープラン

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

プランを選ぶ

期間限定セール 選択中 15日間 $6.00 $4.99
  • 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 GB 7日間 $2.49 $2.49
3 GB 15日間 $4.99 $1.66
3 GB 30日間 $5.99 $2.00
5 GB 30日間 $8.99 $1.80
10 GB 30日間 $16.99 $1.70
20 GB 30日間 $28.99 $1.45
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？

1日の目安：地図2時間、通話数回、短いビデオ通話、WhatsAppでの写真、リールやTikTokを30分 — 1日あたり約1 GB。

  • 週末または3日間
    約3 GB     3 GB · 15日間
    $4.99
  • 7日間
    約7 GB     10 GB · 30日間
    $16.99
  • 14日間
    約14 GB     20 GB · 30日間
    $28.99
  • 30日間
    約30 GB     20 GB · 30日間
    $28.99
  • 毎日の動画視聴とテザリング 1日無制限
    $2.49 / 日から

スクロールやストリーミング、テザリングが多めなら、ワンサイズ上か1日プランを選びましょう。

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?

At Haneda Airport, you walk past the SIM counter queue and open Google Maps for the train into Tokyo. Your eSIM gives you data without that extra stop. On the ride, you trace the route to Asakusa and save the address of a ramen shop. Outside the station, Google Translate helps you read the menu, and you send a photo of your bowl home through WhatsApp.

Your Japan & South Korea route continues in Seoul, where you open NAVER Map to find your way through Jongno to a courtyard cafe. You book a palace tour, then use KakaoTalk to message a friend about where to meet. Back in Tokyo for your final stop, you use Uber to arrange a ride and Uber Eats to order dinner to your accommodation, following the delivery progress while you sort your photos.

What should tourists look for in a Japan & South Korea eSIM?

For Japan & South Korea, look for a regional eSIM that covers both countries and the routes between your sightseeing stops. This plan covers both, with its strongest reach in cities and main tourist areas. Hotspot works on most plans, and you can top up with more data when needed.

Choose an option you can prepare before flying. This eSIM installs in one tap from the button in your order email, with 180 days from purchase to activate. It is data-only, and the data allowance and validity depend on the package you choose.

Where does the Japan & South Korea eSIM have coverage?

Your Japan & South Korea eSIM connects to local networks including KDDI/au, SoftBank, SKTelecom, LG Uplus, with 3G/4G/5G coverage. Coverage is strongest in cities and main tourist areas, including Tokyo, Kyoto and Osaka in Japan, and Seoul and Busan in South Korea. It becomes patchier in Japan’s mountain interior and remote outer islands, and across mountainous parts of South Korea such as Seoraksan National Park.

SimSwift eSIMLocal SIMRoaming
SetupInstall at home before you flyFind a shop or airport kiosk and queue after landingNothing to install; switch roaming on
When you're connectedOn landing, when connected to a supported networkAfter purchase and setupOn landing if your home plan includes roaming there
Paperwork / IDNo paperwork or ID neededID may be asked for at the counterNo additional paperwork beyond your existing home account
Cost predictabilityPay once upfront for your chosen packageBuy on arrival at local ratesDepends on your home plan and included roaming
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-upsAdd data anytime with a top-upUse the provider’s app or return to a shopExtra data depends on your home plan

What digital travel tips help in Japan & South Korea?

  • Save accommodation addresses in Japanese and Korean, plus screenshots of booking confirmations, so you can show them without loading a page.
  • Download offline walking maps for Japan; save route screenshots for South Korea, where offline navigation options are more limited.
  • Bring 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; small restaurants and market stalls do not all accept mobile wallets.
  • Set your phone to silent on trains in Japan and South Korea, and use headphones for navigation audio.
  • Keep a power bank insulated during winter sightseeing in Seoul; cold weather drains phone batteries faster.

Japan & South Korea eSIMの料金はいくらですか？

SimSwiftのJapan & South Korea eSIMは、1 GB・7日間有効で$2.49からご利用いただけます。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 in Japan & South Korea?

Install at home in one tap using the button in your order email; keep the line off until landing at Haneda, Narita or Incheon International Airport. Switch it on with data roaming enabled; it automatically connects to a supported local network. Activate within 180 days of purchase.

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 exploring Japan & South Korea?

Yes, hotspot and tethering work on most plans. During a museum visit in Ueno Park, share your connection with a companion so they can open the exhibition guide 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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