You land in Osaka, switch off airplane mode, and open Google Maps. One question immediately comes to mind: will using your phone cost hundreds of dollars, or just $5 a day?
This guide explains Vodafone Australia's roaming costs in Japan, the network you'll use, how to set everything up, and when a Japan eSIM, like Sakura Mobile, may be the better option.
Vodafone Australia Roaming in Japan at a Glance
- Costs: $5 AUD/day on eligible postpaid plans (charged only on days you use roaming). Prepaid roaming passes cost $5 (1 day), $15 (3 days), $35 (7 days).
- Network: Connects to NTT docomo's 4G network. 5G is not available.
- Roaming limit: Up to 90 days per calendar year across all eligible roaming destinations.
Compare Sakura Mobile's travel eSIM and SIM plans for reliable coverage on Japan's local networks, transparent pricing, and English support before your trip.
- Vodafone Australia Roaming in Japan at a Glance
- How Much Does Vodafone AU Roaming Cost in Japan?
- Will You Get 5G or 4G in Japan?
- How to Turn On Vodafone AU Roaming in Japan
- How Vodafone Australia's Roaming Charges Actually Work
- What Works and What Doesn't While Roaming
- Avoid Double Charges with a Local eSIM
- Real Trip Cost Examples: Vodafone vs. Sakura Mobile
- Which Option Is Right for Your Trip?
- Vodafone AU Roaming vs. Local Japan eSIM
- FAQ
- One Last Thing Before You Fly to Japan
How Much Does Vodafone AU Roaming Cost in Japan?
This is usually built into current postpaid SIM Only plans (65 GB, 220 GB, and 420 GB):
- $5 a day, only charged on days you use your phone.
- Two lines or eSIMs on one account are charged separately—using both the same day means $10, not $5.
Prepaid – Roaming Add-Ons
Prepaid customers need to buy an add-on before their trip. Your last top-up must have been Prepaid Plus or Pay & Go. Buy through My Vodafone, Express Recharge, or by texting ROAM1, ROAM3, or ROAM7 to 1511—it isn't switched on by default.
| Add-On | Price | Notes |
|---|---|---|
| 1 day | $5 | Flat rate, any usage |
| 3 days | $15 | Same price no matter how much you use |
| 7 days | $35 | Same price no matter how much you use |
Pay As You Go Rates (No Add-On)
If you're not covered, or your add-on runs out, standard overseas rates apply—and the bill can add up fast:
| Service | Rate |
|---|---|
| Calls (make or receive) | $1 per 60 seconds |
| Texts sent | $0.75 each (receiving is free) |
| Picture messages sent | $0.75 each |
| Data | $1 per MB (about $1,024 per GB) |
⚠️ Watch out: A five-minute video call at these rates could cost over $100. Check My Vodafone before using any data in Japan.
If you'd rather skip the risk of accidental charges altogether, a dedicated Japan eSIM keeps your Australian SIM active for calls and texts while your data runs on a separate local plan.
Which Plans Qualify for $5 Roaming?
Current postpaid SIM Only phone plans (65 GB, 220 GB, 420 GB) qualify. Mobile broadband, tablet, and modem plans—including Infinite Data plans—follow separate rules. Plan inclusions change over time, so confirm in the My Vodafone app; ineligible plans default to Pay As You Go rates.
Will You Get 5G or 4G in Japan?
Vodafone AU connects through NTT docomo, with strong coverage in cities, rural areas, and along bullet train routes. But it roams on 4G only, even with a 5G-compatible phone.
That's fine for maps and messaging—but if you're tethering a laptop, video calling, or streaming regularly, a local Japan eSIM with 5G support, such as Sakura Mobile, may perform noticeably better.
How to Turn On Vodafone AU Roaming in Japan
- Check you're covered in the My Vodafone app before you fly.
- Postpaid: confirm $5 Roaming is on under My Vodafone > Roaming settings.
- Prepaid: buy a Roaming Add-on ahead of time.
- On your phone, turn on Data Roaming (Settings > Mobile Data > Data Roaming). Turning it on in your account isn't enough—this step causes most support calls.
- Using your phone as a hotspot? Check My Vodafone, as this can vary between plans.
How Vodafone Australia's Roaming Charges Actually Work
The 24-Hour Rule
Your $5 charge runs on a rolling 24-hour clock from your first use in Japan—a call, text, or bit of data—not a midnight reset.
Example: you check a map at 4 PM. That starts your $5 day, running until 4 PM the next day. Use your phone again at 4:15 PM the following day, and a new $5 day starts.
This works in your favor compared with carriers that use a fixed daily clock. One catch: background apps count as use. Email or social media syncing can quietly start your $5 day, so use airplane mode for a true day off.
Prepaid Time Zone Trap
Prepaid add-ons expire at midnight Australian Eastern Standard Time (AEST)—not local time. Japan is roughly an hour behind AEST, so a 1-day add-on can run out around 11 PM local time, often mid-dinner.
How to avoid it: buy your add-on a little early, and choose 3-day or 7-day packs over several 1-day packs—the lost hour matters less over a longer trip.
The 90-Day Roaming Cap
$5 Roaming and prepaid add-ons are capped at 90 days a year, combined across every country you visit (not just Japan), and it only resets on 1 January—not with your bill or each trip.
Example: used 60 days in Bali and New Zealand already? Only 30 days are left for Japan before standard rates kick in.
Frequent travelers or long-stay visitors avoid burning through this allowance by shifting data use to a dedicated Japan eSIM.
What Works and What Doesn't While Roaming
Doesn't work:
- WiFi Calling doesn't work while roaming on postpaid or prepaid—it switches off overseas entirely.
- VoLTE (clearer 4G calls) also isn't supported for roaming in Japan.
Free:
- Receiving texts—including bank security codes—is free on any plan. Receiving calls is charged the same as making one.
Avoid Double Charges with a Local eSIM
Pairing your Vodafone AU line with a local eSIM for data is common, given the 4G limit and daily fee. But phones can switch between active SIMs on their own—set it up wrong and you could be charged by both on the same day.
Recommended setup for a Sakura Mobile eSIM:
- Turn off Data Roaming on your Vodafone AU line (keep it on just for calls and free texts, if you'd like)
- Set your Sakura Mobile eSIM as your default data line
- Keep Data Roaming off for the Sakura Mobile eSIM too—just turn on normal mobile data, since it connects straight to a local Japanese network.
This keeps your Australian number active for calls and free security texts while your data comes from Sakura Mobile's 5G-capable local network, backed by English support from a team based in Japan.
Real Trip Cost Examples: Vodafone vs. Sakura Mobile
| Trip Length | Postpaid $5 Roaming | Sakura Mobile 3GB/Day eSIM | Sakura Mobile Unlimited eSIM |
|---|---|---|---|
| 3 days | $15 | $21.89 | $25.82 |
| 5 days | $25 | $30.64 | $36.33 |
| 7 days | $35 | $36.77 | $45.96 |
| 10 days | $50 | $44.65 | $58.65 |
| 14 days | $70 | $56.03 | $73.53 |
*All figures in AUD. Vodafone figures reflect $5 Roaming (postpaid or prepaid, which cost the same per day). Sakura Mobile prices are for its travel eSIM plans. Conversions to AUD are as of July 23, 2026.
For trips of a week or less, Vodafone $5 Roaming is the cheaper option on price alone. But the gap narrows fast: by 10 days, Sakura Mobile's 3GB/day eSIM already undercuts Vodafone, and by 14 days, it's nearly $14 cheaper—while also giving you access to Japan's local 5G network, which Vodafone roaming doesn't offer at any price.
If You're Comparing to Standard Roaming Rates
If you skip $5 Roaming altogether and rely on Vodafone's Pay As You Go rates, the difference is stark:
| Trip Length | Postpaid $5 Roaming | Light PAYG Use* |
|---|---|---|
| 3 days | $15 | ~$86 |
| 5 days | $25 | ~$144 |
| 7 days | $35 | ~$201 |
| 10 days | $50 | ~$288 |
| 14 days | $70 | ~$403 |
*Based on 5 minutes of calls, 5 texts sent, and 20 MB of data a day at standard rates. AUD.
The real risk isn't the daily pass—it's falling back to standard rates, where $1/MB of data adds up fast.
Which Option Is Right for Your Trip?
| If you... | Best Option |
|---|---|
| Have a short trip (under a week), occasional data | Vodafone $5 Roaming |
| Just need your Australian number for calls/texts | Vodafone |
| Plan to stream, video call, or work remotely | Sakura Mobile eSIM |
| Want 5G where available | Sakura Mobile eSIM |
| Are staying two weeks or more | Sakura Mobile eSIM |
| Are close to the 90-day roaming limit | Sakura Mobile eSIM |
| Want the simplest setup, no extra SIM | Vodafone |
| Want English support from a Japan-based team | Sakura Mobile eSIM |
Vodafone AU Roaming vs. Local Japan eSIM
| Feature | Vodafone AU $5 Roaming | Sakura Mobile eSIM |
|---|---|---|
| Network | 4G only | Up to 5G |
| Data | Shared from home plan | Unlimited data |
| Support | Vodafone AU chat support | Japan-based English support via phone, email, live chat, and in-person support |
| Setup | Use your Australian number | QR code, minutes to activate |
| Best for | Short trips, staying reachable | Longer or data-heavy trips |
Which should you choose? For most travelers, the decision comes down to trip length and data use.
- Under a week: Vodafone roaming is usually easiest.
- One to two weeks: Compare the total cost against a Japan eSIM.
- Several weeks or heavy data use: Sakura Mobile generally offers better value, 5G access, and local support.
FAQ
- Q: Does Vodafone Australia charge for receiving texts in Japan?
A: No—receiving texts is completely free on all Vodafone AU plans in Japan. That means you can safely receive bank security codes and two-factor authentication (2FA) texts without triggering the $5 a day roaming fee. You're only charged if you send a text or answer a phone call.
- Q: Is Vodafone Australia's roaming 5G in Japan?
A: No. Vodafone AU connects to NTT docomo's 4G network when roaming in Japan. Even if you have a 5G-compatible phone, your Vodafone roaming service is limited to 4G speeds. If you want access to Japan's 5G network, consider using a local travel eSIM, such as Sakura Mobile, on a compatible device.
- Q: Will I be charged twice if I use a local eSIM alongside my Vodafone AU line?
A: Not if you set your phone up correctly. Turn off Data Roaming on your Vodafone line and set your Sakura Mobile eSIM as your default line for mobile data. This popular setup lets you keep your Australian number active for free incoming texts while using Sakura Mobile's network for affordable data.
- Q: Does a prepaid pack expire at midnight in Japan or Australia?
A: It expires at midnight Australian Eastern Standard Time (AEST). Because Japan is typically one hour behind AEST, a 1-day prepaid pack actually runs out around 11 PM local Japanese time. Be careful—this time zone difference can easily cut your data off in the middle of dinner.
- Q: What happens if I go over the 90-day Vodafone AU roaming limit?
A: Vodafone strictly caps its $5 Roaming feature at 90 days per calendar year, and this limit adds up across every country you visit combined. Once you pass 90 days, you're automatically switched to Pay As You Go rates, which can get expensive fast. For long holidays or frequent travelers, a dedicated travel eSIM helps you avoid burning through this strict allowance.
- Q: Does my Vodafone Australia home data allowance apply while roaming in Japan?
A: Yes—the $5 a day fee lets you use your standard Australian allowance rather than a separate travel data bucket. If you use up all your home data while navigating Japan, Vodafone will automatically charge you an extra $5 for every 1 GB you use.
FAQ
One Last Thing Before You Fly to Japan
- $5 a day postpaid, or $5-$35 flat-rate prepaid packs
- Rolling 24-hour clock from first use (postpaid)—not a fixed daily reset
- Prepaid packs expire at midnight AEST, which can cut a "1-day" pack short in Japan
- Capped at 90 days a year, across every country
- 4G only—no 5G, WiFi calling, or VoLTE
- Receiving texts (including bank codes) is free; receiving calls isn't
Planning a longer or data-heavy trip, or close to your 90-day cap? Pairing your Vodafone AU line with a Japan eSIM like Sakura Mobile gets you faster data with no daily fee, while your Australian number stays active for calls and and free security texts.
