The Japan country snapshot records an unlimited-plan fair-use profile of 1 GB full-speed data per day, followed by 256 kbps. Exact SKU terms may differ. At a nominal 256 kbps, activities such as Spotify "Normal" music, Zoom audio-only call, Spotify "High" music might be feasible under favorable network conditions, but Spotify "Very high" music will struggle. Unlimited plans start at $1.86.
What 1 GB of full-speed data a day buys
Based on the data rates the services publish (MB per hour = kbit/s × 0.45):
| Activity | Per hour | Hours per day at full speed |
|---|---|---|
| Zoom 1:1 video (high quality) | 540 MB | 1.9 h |
| Netflix "Low" streaming | 300 MB | 3.4 h |
| Netflix "Medium" streaming | 700 MB | 1.5 h |
| Spotify "Normal" music | 43 MB | 23.8 h |
After the cap: approximate bitrate thresholds at 256 kbps
Once today's 1 GB is used, the connection is limited to 256 kbps (about 115 MB per hour if fully used). Video calls need that speed in both directions, and real speeds can be lower on a busy network.
| Activity | Needs about | At 256 kbps |
|---|---|---|
| Messaging and email (text) | 32 kbps | Theoretical minimum met |
| Spotify "Normal" music | 96 kbps | Theoretical minimum met |
| Zoom audio-only call | 80 kbps | Theoretical minimum met |
| Spotify "High" music | 160 kbps | Theoretical minimum met |
| Spotify "Very high" music | 320 kbps | Below indicative minimum |
| Zoom 1:1 video, high quality | 600 kbps | Below indicative minimum |
| Netflix "Low" video | 667 kbps | Below indicative minimum |
| Zoom 1:1 video, 720p | 1,200 kbps | Below indicative minimum |
| Netflix "Medium" video | 1,556 kbps | Below indicative minimum |
Service figures are approximate illustrative bitrates, not measurements. Passing a bitrate threshold does not guarantee usable calls, streaming or coverage. Netflix rates convert estimated GB/hour to kbps; messaging is an estimate.
How Japan compares
62 of 189 destinations with unlimited plans give more full-speed data per day than Japan, and 120 give the same 1 GB. In Asia, the daily allowance ranges from 1 GB to 5 GB. Plans in Japan run on KDDI/au, NTT docomo, Rakuten Mobile with 5G listed. Unlimited starts at $1.86 versus $1.40 for the cheapest fixed plan.
| Fixed plan in Japan | Price | Per GB | Equivalent to |
|---|---|---|---|
| 1 GB | $1.40 | $1.40 | 1.0 days of the daily cap |
| 5 GB | $3.00 | $0.60 | 5.0 days of the daily cap |
| 10 GB | $7.57 | $0.76 | 10.0 days of the daily cap |
Unlimited or a fixed plan in Japan?
Over a 7-day trip the daily cap adds up to about 7 GB of full-speed data, and about 14 GB over 14 days, but only if you use it evenly; unused allowance does not roll over in this illustrative daily-cap model; verify the exact SKU. Fixed plans are listed at 5 GB for $3.00, 10 GB for $7.57. A fixed plan suits trips with a few heavy days, such as a long video call day; a daily cap suits steady use. See daily cap vs fixed GB.
Estimating your own use? See our Japan data estimate.
Fair-use limits elsewhere in Asia
| Destination | Full speed / day | After cap | Unlimited from |
|---|---|---|---|
| Japan | 1 GB | 256 kbps | $1.86 |
| Armenia | 1 GB | 512 kbps | $2.67 |
| Azerbaijan | 1 GB | 512 kbps | $7.00 |
| Bangladesh | 1 GB | 512 kbps | $2.48 |
| China | 1 GB | 384 kbps | $2.13 |
| Georgia | 1 GB | 512 kbps | $4.50 |
Questions travelers ask about this destination
Is unlimited eSIM data really unlimited in Japan?
Not at full speed. TripoSIM's unlimited plans for Japan give 1 GB per day at full speed, then 256 kbps under the observed country profile. Verify the exact plan terms and expect service performance to vary.
What can I do at 256 kbps in Japan?
At 256 kbps, Messaging and email (text), Spotify "Normal" music, Zoom audio-only call, Spotify "High" music work. Activities needing more, such as Spotify "Very high" music, will struggle.
How many hours of video calls does the Japan daily cap allow?
About 1.9 hours of a high-quality Zoom 1:1 call (roughly 540 MB per hour) fit inside the 1 GB daily full-speed allowance, or about 3.4 hours of Netflix on the Low setting.
Source and method
Figures come from the TripoSIM travel eSIM dataset (CC BY 4.0), generated from TripoSIM's live catalog on 2 November 2026: country-level observed price fields in USD, which do not verify a purchasable plan for a specific trip. Rankings compare the median price per GB across observed catalog entries in each country. This site is owned by the same company as TripoSIM, so this is first-party data, not an independent market survey. Prices, plan duration and individual terms can change; the checkout page is authoritative. A country-level network list can combine different SKUs, not networks guaranteed in any one purchased profile.