How do I activate my eSIM?

Go to Settings, then Cellular (or Mobile Data), tap Add eSIM / Add Data Plan, scan the QR code from your email, set this eSIM as your data line and turn on Data Roaming.

Is my phone compatible with eSIM?

Open Settings, then Cellular. If you see Add eSIM / Add Data Plan, your phone supports eSIM. Note that some China-mainland phone versions do not support eSIM.

When does my plan start?

Your plan starts when you activate the eSIM on your phone, not at the time of purchase.

Yes. We offer a full refund if the eSIM has not been activated. Once installed, the plan is non-refundable.

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MUSMOON

Japan eSIM 9GB 3Days Travel Data

Name: Japan eSIM 9GB 3Days Travel Data
Brand: MUSMOON
SKU: ESIM-JAPAN-01
Price: 12.15 USD
Availability: InStock

$12.15

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Japan eSIM 9GB 3Days — Enough Data for a Whirlwind City Break

Arriving at Haneda or Kansai, the last thing you want is to hunt for a pocket Wi-Fi counter. This 9GB Japan eSIM keeps you online from the moment you land — Google Maps for the Shibuya crossing, Instagram stories from Arashiyama bamboo grove, and a quick video call home after your first bowl of tonkotsu ramen.

Why travelers pick this plan

9GB total across 3 days (3GB/day) — steady daily allowance for navigation, messaging and light streaming
Instant activation via QR code before or after arrival; no SIM swapping
4G/5G on major networks (NTT Docomo / Softbank / KDDI coverage areas)
Data-only plan — your existing WhatsApp, iMessage and LINE numbers stay active

Ideal for

Short layovers in Tokyo, 3-day Kyoto-Osaka express trips, or business blitzes where you mostly need maps, email and ride-hailing. If you plan to stream or hotspot all day, consider a larger plan — otherwise this is the sweet spot.

Note: Validity counts from first use. Install the eSIM before departure and activate when you land to make every hour count.

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Japan eSIM 9GB 3Days Travel Data