HelloRoam eSIM for Japan: 1GB from $3.49 (2026)
Pricing verified May 2026 · By The Roaming Cost Desk
Short Answer:
HelloRoam covers Japan for $3.49 total (1GB on NTT docomo, KDDI/au). AT&T charges $12/day for the same trip. Verizon charges $12/day. You save $80.51 per week with HelloRoam. Instant QR install, no contract changes.
HelloRoam plans for Japan
Fixed data plans with no daily charges.
Fixed Data Plans
- ✓204+ carrier networks worldwide
- ✓180-day refund policy
- ✓Instant QR install
Unlimited Daily Plans
| Duration | eSIM Total | Per Day | AT&T Cost | You Save |
|---|---|---|---|---|
| 1 day | $3.35 | $3.35 | $12.00 | $8.65(72%) |
| 3 days8% off | $9.63 | $3.21 | $36.00 | $26.37(73%) |
| 7 days8% off | $22.48 | $3.21 | $84.00 | $61.52(73%) |
| 14 days11% off | $43.49 | $3.11 | $168.00 | $124.51(74%) |
| 30 days18% off | $85.85 | $2.86 | $360.00 | $274.15(76%) |
How HelloRoam works in Japan
Networks, activation, and compatibility.
Networks and Speed
HelloRoam connects to NTT docomo, KDDI/au in Japan. Average download speeds are 225 Mbps. 5G is available where the local network supports it. Your data runs at the same speed as a local subscriber, not the throttled 2G that T-Mobile offers for free.
Activation Steps
- 1Purchase a Japan eSIM plan on HelloRoam.Choose fixed data or unlimited daily based on your trip length.
- 2Scan the QR code to install the eSIM.Takes under 2 minutes. Install before you board your flight.
- 3Enable the eSIM data line when you land in Japan.Go to Settings > Cellular > HelloRoam line > Turn on Data Roaming.
- 4Keep your carrier line for calls and texts.Your US/UK number stays active. Disable carrier data to prevent dual charges.
- 5Switch back when you return home.The eSIM stays installed for your next trip. No re-purchase needed if data remains.
Device Compatibility
HelloRoam works on iPhone XS and newer, Samsung Galaxy S20 and newer, Google Pixel 3a and newer, and most 2020+ Android phones with eSIM support. Check your phone settings for "Add eSIM" or "Add Cellular Plan" to confirm compatibility before purchase.
HelloRoam vs carrier roaming in Japan
Side-by-side cost comparison for a 7-day trip.
| Provider | 7-Day Cost | Data | Speed | Verdict |
|---|---|---|---|---|
| HelloRoam | $3.49 | 1GB | LTE/5G | Best value |
| AT&T | $84.00 | 2GB/day | LTE | Expensive |
| T-Mobile (free) | $0.00 | Unlimited | 128kbps | Unusable speed |
| Verizon | $84.00 | 5GB/day | LTE | Expensive |
HelloRoam vs other eSIM providers
Provider comparison for Japan.
HelloRoam vs Airalo in Japan
HelloRoam offers 1GB for $3.49 in Japan. Airalo offers 10GB for $25.00. Both connect to NTT docomo, KDDI/au. HelloRoam provides more carrier network coverage (204+ networks) and a 180-day refund policy.
HelloRoam vs Holafly in Japan
HelloRoam offers 1GB for $3.49 in Japan. Holafly offers Unlimited for $57.00. Both connect to NTT docomo, KDDI/au. HelloRoam provides more carrier network coverage (204+ networks) and a 180-day refund policy.
HelloRoam vs Saily in Japan
HelloRoam offers 1GB for $3.49 in Japan. Saily offers 10GB for $18.99. Both connect to NTT docomo, KDDI/au. HelloRoam provides more carrier network coverage (204+ networks) and a 180-day refund policy.
Japan travel connectivity tips
Data usage, Wi-Fi, and local context.