# Best eSIM for Japan

> The cheapest eSIM plan for Japan by trip length and data use.

Page: https://esimnest.com/japan/best-esim/ · Data as of: 2026-10-14 · Prices: US dollars

172 eSIM plans work in Japan, from $0.47. This page picks the cheapest plan that covers each trip length and level of use. Prices from the eSimNest catalogue on 2026-10-14; eSimNest sells these plans.

For a week of everyday use, the cheapest eSIM plan that covers it is Japan 10GB 30Days: 10 GB for 30 days for $7.33.

For a three-day trip with light use, Japan 1GB 7Days covers it for $1.09 (1 GB for 7 days).

## The cheapest plan that covers your trip

Each cell is the cheapest plan made for Japan with enough data for the trip, as on the Japan page. Light use: about 0.3 GB a day; Everyday use: about 1.0 GB a day; Heavy use: about 2.5 GB a day.

| Trip | Light use | Everyday use | Heavy use |
| --- | --- | --- | --- |
| 3 days | [Japan 1GB 7Days](https://esimnest.com/japan/#plan-japan-1gb-7days): 1 GB for 7 days, $1.09 | [Japan 3GB 15Days](https://esimnest.com/japan/#plan-japan-3gb-15days): 3 GB for 15 days, $2.65 | [Japan 10GB 30Days](https://esimnest.com/japan/#plan-japan-10gb-30days): 10 GB for 30 days, $7.33 |
| 7 days | [Japan 3GB 15Days](https://esimnest.com/japan/#plan-japan-3gb-15days): 3 GB for 15 days, $2.65 | [Japan 10GB 30Days](https://esimnest.com/japan/#plan-japan-10gb-30days): 10 GB for 30 days, $7.33 | [Japan 20GB 30Days](https://esimnest.com/japan/#plan-japan-20gb-30days): 20 GB for 30 days, $12.79 |
| 14 days | [Japan 5GB 30Days](https://esimnest.com/japan/#plan-japan-5gb-30days): 5 GB for 30 days, $4.21 | [Japan 20GB 30Days](https://esimnest.com/japan/#plan-japan-20gb-30days): 20 GB for 30 days, $12.79 | [Japan 50GB 30Days](https://esimnest.com/japan/#plan-japan-50gb-30days): 50 GB for 30 days, $24.48 |
| 30 days | [Japan 10GB 30Days](https://esimnest.com/japan/#plan-japan-10gb-30days): 10 GB for 30 days, $7.33 | [Japan 50GB 30Days](https://esimnest.com/japan/#plan-japan-50gb-30days): 50 GB for 30 days, $24.48 | [Japan - Unlimited - 30 days](https://esimnest.com/japan/#plan-japan-unlimited-30-days): unlimited data for 30 days, $38.02 |

## The cheapest is not the only choice

### 7 days, everyday use

- Cheapest Japan plan: [Japan 10GB 30Days](https://esimnest.com/japan/#plan-japan-10gb-30days), $7.33, 10 GB for 30 days; it works only in Japan.
- Cheapest unlimited plan: [Japan 1GB/Day FUP1Mbps Unlimited](https://esimnest.com/japan/#plan-japan-1gbday-fup1mbps), $8.75, 1 GB a day for 7 days, then slower; it works only in Japan.
- Next cheapest: [Japan 10GB 30Days (IIJ)](https://esimnest.com/japan/#plan-japan-10gb-30days-iij), $7.33, 10 GB for 30 days; it works only in Japan.
- Next cheapest: [Asia - 10 GB - 30 days](https://esimnest.com/japan/#plan-asia-10-gb-30-days-5), $7.96, 10 GB for 30 days; it also covers other countries in the region.

### 14 days, everyday use

- Cheapest Japan plan: [Japan 20GB 30Days](https://esimnest.com/japan/#plan-japan-20gb-30days), $12.79, 20 GB for 30 days; it works only in Japan.
- Cheapest overall (also works outside Japan): [Asia - 20 GB - 30 days](https://esimnest.com/japan/#plan-asia-20-gb-30-days), $12.17, 20 GB for 30 days; it also covers other countries in the region.
- Cheapest unlimited plan: [Japan 1GB/Day FUP1Mbps Unlimited](https://esimnest.com/japan/#plan-japan-1gbday-fup1mbps), $17.50, 1 GB a day for 14 days, then slower; it works only in Japan.
- Next cheapest: [Japan 20GB 30Days (IIJ)](https://esimnest.com/japan/#plan-japan-20gb-30days-iij), $12.79, 20 GB for 30 days; it works only in Japan.
- Next cheapest: [Japan - 20 GB - 30 days](https://esimnest.com/japan/#plan-japan-20-gb-30-days), $12.95, 20 GB for 30 days; it works only in Japan.

## Networks these plans use

KDDI, KDDI/au, NTT docomo, Rakuten Mobile, Softbank, SoftBank, SoftBank Corp.

## Questions

### What is the cheapest eSIM for a week in Japan?

For a week of everyday use (about 7 GB), Japan 10GB 30Days is the cheapest plan that covers it at $7.33: 10 GB for 30 days, and it works only in Japan.

### How much data do I need in Japan?

We assume 2.1 GB for a week of light use (maps and messaging), 7 GB for everyday use (adds social media, music and some video) and 17.5 GB for heavy use with a lot of video. Your own habits decide, so the data calculator lets you change the hours.

### Is an unlimited plan worth it for two weeks in Japan?

The cheapest unlimited plan for two weeks is Japan 1GB/Day FUP1Mbps Unlimited at $17.50, against $12.79 for Japan 20GB 30Days (20 GB for 30 days). Unlimited plans often slow down after a daily allowance, so read the plan details.

### Which eSIM is cheapest for a month in Japan?

For 30 days of everyday use the cheapest plan that covers it is Japan 50GB 30Days at $24.48 (50 GB for 30 days). For a longer stay, the long-stay page lists plans valid for 90 days or more.

More: [Japan travel eSIM guide](https://esimnest.com/japan/guide/), [all eSIM plans for Japan](https://esimnest.com/japan/), [data calculator](https://esimnest.com/data-calculator/?destination=japan).