Devices: All 4 on Samsung Galaxy or Google Pixel (Android) Carriers: Jeff, Jeannette, Ana on Verizon (International Day Pass available). Matt’s plan TBD.
The Core Decision
| Option | Who | Cost | Speed | US Number |
|---|---|---|---|---|
| Verizon International Day Pass | Jeff, Jeannette, Ana | $10/day/line (only days used) | Full speed | Yes, native |
| Japanese eSIM + Wi-Fi Calling | All 4 | ~$20–50/person for trip | Full LTE/5G | Yes, via Wi-Fi calling |
Verizon Day Pass is the simplest option for Jeff, Jeannette, and Ana — no setup, US number works natively, full speed. Only downside is cost if you use it every day (~$130/person over 13 days). Days you’re on hotel Wi-Fi all day, it won’t charge.
eSIM + Wi-Fi Calling saves money but requires setup before departure. With Wi-Fi Calling enabled, your Verizon number still rings through over the Japanese data connection — free.
eSIM Options for Japan
If going the eSIM route, Airalo is not the only choice. Compare before buying:
| Provider | Data | Speed | Voice | Notes |
|---|---|---|---|---|
| Holafly | Unlimited | 5G/LTE | No (data only) | Most popular for heavy map/app use |
| Ubigi | Various plans | 5G/LTE | No (data only) | Competitive pricing |
| Nomad | Various plans | 5G/LTE | No (data only) | Good Japan coverage |
| Airalo | Various plans | LTE | No (data only) | Easy app install; check current plan speeds before buying |
All of these are data-only eSIMs — voice comes from Wi-Fi Calling on your Verizon SIM. That combo works well and is free.
Setup flow (buy before departure, at home on US Wi-Fi):
- Purchase your chosen eSIM plan for Japan
- Install the eSIM profile (most providers use a QR code or app install)
- Leave it inactive until you land at HND
- At HND: activate the Japan eSIM, set it as preferred data SIM
- Turn off Verizon data roaming — keeps your US number reachable but blocks the $10/day charge
Samsung Galaxy - Step by Step
Adding the eSIM (QR code method, works with any provider):
- Settings → Connections → SIM card manager → Add mobile plan → scan QR code from your provider
- Some providers also have apps that install the eSIM directly (skips QR step)
Activating on arrival:
- Settings → Connections → SIM card manager → [Japan eSIM] → toggle On
Set Japanese eSIM as data SIM:
- Settings → Connections → SIM card manager → Mobile data → select Japan eSIM
Turn off Verizon data roaming:
- Settings → Connections → SIM card manager → [Verizon SIM] → tap it → Roaming → Off
Enable Wi-Fi calling on Verizon SIM (do this in the US before departure):
- Settings → Connections → SIM card manager → [Verizon SIM] → Wi-Fi calling → On
- This lets US calls reach your Verizon number via the Japanese data connection - free
- Must be activated while on US soil - cannot enable abroad
Google Pixel - Step by Step
Adding the eSIM:
- Settings → Network & internet → SIMs → Add SIM → “Download a SIM instead” → scan QR code from your provider
- Some providers have apps that install the eSIM directly (skips the QR step)
Activating on arrival:
- Settings → Network & internet → SIMs → [Japan eSIM] → toggle On
Set Japanese eSIM as data SIM:
- Settings → Network & internet → SIMs → [Japan eSIM] → Use SIM → Mobile data → On
- Then [Verizon SIM] → Mobile data → Off
Turn off Verizon data roaming:
- Settings → Network & internet → SIMs → [Verizon SIM] → Roaming → Off
Enable Wi-Fi calling on Verizon SIM (do this in the US):
- Settings → Network & internet → SIMs → [Verizon SIM] → Wi-Fi calling → On
Does This Actually Work? What to Expect
| Scenario | What Happens |
|---|---|
| Browsing, Maps, apps | Uses Japanese eSIM - fast, full speed |
| Someone calls your US number | Rings through via Wi-Fi calling on Japanese data - free |
| You call a US number | Use WhatsApp or dial through Verizon (charges apply - use sparingly) |
| Subway / no signal | Japanese eSIM loses data same as any SIM - use offline maps |
| $10/day Verizon charge | Does not trigger as long as Verizon data roaming is off |
Matt’s Connectivity
If Matt doesn’t have an international plan, eSIM is his answer. Same Airalo setup, same ~$20 for the trip. Airalo works on any unlocked Android - check that his phone is carrier-unlocked first (most US phones are, but worth confirming).
Group Communication in Japan
Everyone is on Android - use:
- WhatsApp - best option, works on data, cross-platform if needed, good for group chat + photo sharing
- Google Messages (RCS) - works well between Android devices, end-to-end encrypted, already installed
- Set up a group thread before departure and confirm all 4 are connected
No iMessage - that’s iPhone only.
IC Cards for Transit (Android)
IC cards (Suica/ICOCA/Pasmo) are how you pay for every train, bus, and many convenience store purchases.
Android options:
- Google Pay + Suica - add a Suica card directly in Google Pay (Settings → Wallet → Add a card → Transit card → Suica). Works via NFC tap. Available on most modern Samsung and Pixel devices.
- Samsung Pay - also supports Suica on Samsung devices
- Physical IC card - the universal fallback. Buy at any station machine (accepts international credit cards, English interface). Load ¥5,000–10,000 per person on arrival at HND.
Physical cards are the simplest option for the group since not everyone may have the same wallet app setup. Buy them all at HND together on arrival.
Key Apps - Download Before Departure
| App | Purpose | Offline? |
|---|---|---|
| Google Maps | Navigation, transit routing | ✅ Download offline maps for Osaka, Kyoto, Tokyo separately |
| Google Translate | Text translation | ✅ Download Japanese language pack |
| Google Lens | Point camera at Japanese text | ✅ Works offline with Japanese pack installed |
| eSIM provider app | eSIM management (Holafly, Ubigi, Nomad, or Airalo) | Online to purchase; SIM works offline |
| SmartEX | Shinkansen booking | Online required |
| Group communication | Works on data | |
| Suica (via Google Pay) | Transit card | NFC - works without data |
Critical before leaving: Open Google Maps → search “Osaka” → Download area. Repeat for Kyoto and Tokyo. Subway stations lose signal - offline maps are essential.
Japan Etiquette for Phones
- No phone calls on trains - step into the vestibule between cars if you must take a call
- Quiet voices on transit and in restaurants
- Photos: check signage at each location - some temples and museum galleries prohibit photography
Links
- Phone Setup - full phone prep checklist for all travelers
- Train & Pass Strategy
- Pre-Departure Checklist
- Trip Publishing — Quartz and Wanderlog