Best eSIM for Japan

138 prepaid data plans from 8 providers, read from their own sites on October 5, 2026. Sorted by price, with the fields that change what you actually get.

Cheapest plan

$3.50

aloSIM · 1 GB, 1 day

Best price per GB

$0.55/GB

aloSIM · 50 GB, 10 days

Cheapest unlimited

$3.90

Holafly · Unlimited, 1 day

Regional plans that include it

23 of 69

Ubigi Asia

Cheapest plan by trip length and usage

For a trip only in Japan. Each cell is the cheapest plan that holds enough data and stays valid for the whole stay.

Trip length	Lightabout 0.35 GB a day	Standardabout 0.8 GB a day	Highabout 1.8 GB a day
3 days	$3.50Ubigi · 1 GB · 3 days	$7.00aloSIM · 5 GB · 3 days	$11.00Nomad · Unlimited · 3 days
7 days	$7.00Nomad · 3 GB · 30 days	$14.00Ubigi · 10 GB · 7 days	$22.00aloSIM · 20 GB · 7 days
10 days	$10.00aloSIM · 5 GB · 10 days	$16.50Ubigi · 10 GB · 30 days	$23.00aloSIM · 20 GB · 10 days
15 days	$16.50Ubigi · 10 GB · 30 days	$24.00Airalo · 20 GB · 15 days	$30.00aloSIM · 50 GB · 15 days
30 days	$24.99Saily · 20 GB · 30 days	$32.00Ubigi · 25 GB · 30 days	$65.00Ubigi · Unlimited · 30 days

All eSIM plans for Japan

All eSIM plans for Japan
Provider	Data	Validity	Price	Price per GB	Hotspot	Validity starts	Top-up	See plan
aloSIM	1 GB	1 day	$3.50	$3.50	Yes	On first connection	Yes	See plan →
Ubigi	1 GB	3 days	$3.50	$3.50	Yes	On first connection	Yes	See plan →
Holafly	Unlimited	1 day	$3.90	–	Yes	On first connection	No	See plan →
Saily	1 GB	7 days	$3.99	$3.99	Yes	On first connection	Yes	See plan →
SailyFair-use limit	Unlimited	1 day	$3.99	–	Yes	On first connection	Yes	See plan →
Airalo	1 GB	3 days	$4.00	$4.00	Yes	On first connection	Yes	See plan →
aloSIM	1 GB	3 days	$4.00	$4.00	Yes	On first connection	Yes	See plan →
Nomad	1 GB	7 days	$4.00	$4.00	Yes	On first connection	Yes	See plan →
Ubigi	1 GB	30 days	$4.00	$4.00	Yes	On first connection	Yes	See plan →
YesimFair-use limit	Unlimited	1 day	$4.20	–	Yes	Varies by plan	Not stated	See plan →
Yesim	1 GB	30 days	$4.44	$4.44	Yes	Varies by plan	Not stated	See plan →
aloSIM	3 GB	1 day	$4.50	$1.50	Yes	On first connection	Yes	See plan →
aloSIM	1 GB	5 days	$4.50	$4.50	Yes	On first connection	Yes	See plan →
aloSIM	1 GB	7 days	$4.50	$4.50	Yes	On first connection	Yes	See plan →
aloSIMFair-use limit	Unlimited	1 day	$5.00	–	Yes	On first connection	Yes	See plan →
aloSIM	2 GB	15 days	$6.50	$3.25	Yes	On first connection	Yes	See plan →
aloSIM	5 GB	3 days	$7.00	$1.40	Yes	On first connection	Yes	See plan →
aloSIM	5 GB	5 days	$7.00	$1.40	Yes	On first connection	Yes	See plan →
Nomad	3 GB	30 days	$7.00	$2.33	Yes	On first connection	Yes	See plan →
Airalo	3 GB	3 days	$7.50	$2.50	Yes	On first connection	Yes	See plan →
Ubigi	3 GB	15 days	$7.50	$2.50	Yes	On first connection	Yes	See plan →
Saily	3 GB	30 days	$7.99	$2.66	Yes	On first connection	Yes	See plan →
SailyFair-use limit	Unlimited	2 days	$7.99	–	Yes	On first connection	Yes	See plan →
Airalo	3 GB	7 days	$8.00	$2.67	Yes	On first connection	Yes	See plan →
aloSIM	3 GB	30 days	$8.00	$2.67	Yes	On first connection	Yes	See plan →
aloSIM	5 GB	7 days	$9.50	$1.90	Yes	On first connection	Yes	See plan →
Airalo	5 GB	7 days	$10.00	$2.00	Yes	On first connection	Yes	See plan →
aloSIM	5 GB	10 days	$10.00	$2.00	Yes	On first connection	Yes	See plan →
Nomad	5 GB	30 days	$10.00	$2.00	Yes	On first connection	Yes	See plan →
Ubigi	5 GB	15 days	$10.00	$2.00	Yes	On first connection	Yes	See plan →
Airalo	5 GB	15 days	$10.50	$2.10	Yes	On first connection	Yes	See plan →
aloSIM	5 GB	15 days	$10.50	$2.10	Yes	On first connection	Yes	See plan →
Yesim	5 GB	30 days	$10.56	$2.11	Yes	Varies by plan	Not stated	See plan →
Saily	5 GB	30 days	$10.99	$2.20	Yes	On first connection	Yes	See plan →
Airalo	5 GB	30 days	$11.00	$2.20	Yes	On first connection	Yes	See plan →
aloSIM	5 GB	30 days	$11.00	$2.20	Yes	On first connection	Yes	See plan →
NomadFair-use limit	Unlimited	3 days	$11.00	–	Yes	On first connection	Yes	See plan →
AiraloFair-use limit	Unlimited	3 days	$11.50	–	Yes	On first connection	Yes	See plan →
aloSIMFair-use limit	Unlimited	3 days	$11.50	–	Yes	On first connection	Yes	See plan →
Holafly	Unlimited	3 days	$11.90	–	Yes	On first connection	No	See plan →
SailyFair-use limit	Unlimited	3 days	$11.99	–	Yes	On first connection	Yes	See plan →
Vodafone Travel eSIM	3 GB	10 days	$12.00	$4.00	Yes	Not stated	Yes	See plan →
Vodafone Travel eSIMFair-use limitCalls or SMS included	Unlimited	3 days	$12.00	–	Yes	Not stated	Yes	See plan →
YesimFair-use limit	Unlimited	3 days	$12.60	–	Yes	Varies by plan	Not stated	See plan →
Vodafone Travel eSIM	5 GB	15 days	$13.00	$2.60	Yes	Not stated	Yes	See plan →
Ubigi	10 GB	7 days	$14.00	$1.40	Yes	On first connection	Yes	See plan →
aloSIM	10 GB	5 days	$15.00	$1.50	Yes	On first connection	Yes	See plan →
SailyFair-use limit	Unlimited	4 days	$15.99	–	Yes	On first connection	Yes	See plan →
Ubigi	10 GB	30 days	$16.50	$1.65	Yes	On first connection	Yes	See plan →
Vodafone Travel eSIM	10 GB	30 days	$16.50	$1.65	Yes	Not stated	Yes	See plan →
Airalo	10 GB	7 days	$17.00	$1.70	Yes	On first connection	Yes	See plan →
AiraloFair-use limit	Unlimited	5 days	$17.00	–	Yes	On first connection	Yes	See plan →
aloSIM	10 GB	7 days	$17.00	$1.70	Yes	On first connection	Yes	See plan →
Airalo	10 GB	15 days	$17.50	$1.75	Yes	On first connection	Yes	See plan →
aloSIM	10 GB	10 days	$17.50	$1.75	Yes	On first connection	Yes	See plan →
Saily	10 GB	30 days	$17.99	$1.80	Yes	On first connection	Yes	See plan →
Airalo	10 GB	30 days	$18.00	$1.80	Yes	On first connection	Yes	See plan →
aloSIM	10 GB	15 days	$18.00	$1.80	Yes	On first connection	Yes	See plan →
aloSIM	10 GB	30 days	$18.00	$1.80	Yes	On first connection	Yes	See plan →
Nomad	10 GB	30 days	$18.00	$1.80	Yes	On first connection	Yes	See plan →
SailyFair-use limit	Unlimited	5 days	$18.99	–	Yes	On first connection	Yes	See plan →
Yesim	10 GB	30 days	$19.20	$1.92	Yes	Varies by plan	Not stated	See plan →
aloSIMFair-use limit	Unlimited	5 days	$19.50	–	Yes	On first connection	Yes	See plan →
Holafly	Unlimited	5 days	$20.50	–	Yes	On first connection	No	See plan →
YesimFair-use limit	Unlimited	5 days	$21.00	–	Yes	Varies by plan	Not stated	See plan →
aloSIM	20 GB	7 days	$22.00	$1.10	Yes	On first connection	Yes	See plan →
SailyFair-use limit	Unlimited	6 days	$22.99	–	Yes	On first connection	Yes	See plan →
aloSIM	20 GB	10 days	$23.00	$1.15	Yes	On first connection	Yes	See plan →
Airalo	20 GB	15 days	$24.00	$1.20	Yes	On first connection	Yes	See plan →
aloSIM	20 GB	15 days	$24.00	$1.20	Yes	On first connection	Yes	See plan →
Vodafone Travel eSIMFair-use limitCalls or SMS included	Unlimited	7 days	$24.00	–	Yes	Not stated	Yes	See plan →
Saily	20 GB	30 days	$24.99	$1.25	Yes	On first connection	Yes	See plan →
Airalo	20 GB	30 days	$25.00	$1.25	Yes	On first connection	Yes	See plan →
aloSIM	20 GB	30 days	$25.00	$1.25	Yes	On first connection	Yes	See plan →
NomadFair-use limit	Unlimited	7 days	$25.00	–	Yes	On first connection	Yes	See plan →
UbigiFair-use limit	Unlimited	8 days	$25.00	–	Yes	On first connection	Yes	See plan →
Nomad	20 GB	30 days	$26.00	$1.30	Yes	On first connection	Yes	See plan →
Vodafone Travel eSIM	20 GB	30 days	$26.00	$1.30	Yes	Not stated	Yes	See plan →
AiraloFair-use limit	Unlimited	7 days	$26.50	–	Yes	On first connection	Yes	See plan →
SailyFair-use limit	Unlimited	7 days	$26.99	–	Yes	On first connection	Yes	See plan →
aloSIMFair-use limit	Unlimited	7 days	$27.00	–	Yes	On first connection	Yes	See plan →
aloSIM	50 GB	10 days	$27.50	$0.55	Yes	On first connection	Yes	See plan →
Holafly	Unlimited	7 days	$27.50	–	Yes	On first connection	No	See plan →
YesimFair-use limit	Unlimited	7 days	$29.40	–	Yes	Varies by plan	Not stated	See plan →
Yesim	20 GB	30 days	$29.76	$1.49	Yes	Varies by plan	Not stated	See plan →
SailyFair-use limit	Unlimited	8 days	$29.99	–	Yes	On first connection	Yes	See plan →
aloSIM	50 GB	15 days	$30.00	$0.60	Yes	On first connection	Yes	See plan →
Ubigi	25 GB	30 days	$32.00	$1.28	Yes	On first connection	Yes	See plan →
SailyFair-use limit	Unlimited	9 days	$32.99	–	Yes	On first connection	Yes	See plan →
AiraloFair-use limit	Unlimited	10 days	$34.50	–	Yes	On first connection	Yes	See plan →
aloSIM	50 GB	30 days	$34.50	$0.69	Yes	On first connection	Yes	See plan →
YesimFair-use limit	Unlimited	10 days	$34.57	–	Yes	Varies by plan	Not stated	See plan →
SailyFair-use limit	Unlimited	10 days	$34.99	–	Yes	On first connection	Yes	See plan →
aloSIMFair-use limit	Unlimited	10 days	$35.00	–	Yes	On first connection	Yes	See plan →
Nomad	50 GB	30 days	$35.00	$0.70	Yes	On first connection	Yes	See plan →
Holafly	Unlimited	10 days	$36.50	–	Yes	On first connection	No	See plan →
SailyFair-use limit	Unlimited	11 days	$37.99	–	Yes	On first connection	Yes	See plan →
UbigiFair-use limit	Unlimited	15 days	$39.00	–	Yes	On first connection	Yes	See plan →
Yesim	30 GB	30 days	$39.60	$1.32	Yes	Varies by plan	Not stated	See plan →
SailyFair-use limit	Unlimited	12 days	$40.99	–	Yes	On first connection	Yes	See plan →
NomadFair-use limit	Unlimited	14 days	$41.00	–	Yes	On first connection	Yes	See plan →
YesimFair-use limit	Unlimited	14 days	$41.47	–	Yes	Varies by plan	Not stated	See plan →
SailyFair-use limit	Unlimited	13 days	$43.99	–	Yes	On first connection	Yes	See plan →
SailyFair-use limit	Unlimited	14 days	$46.99	–	Yes	On first connection	Yes	See plan →
Vodafone Travel eSIMFair-use limitCalls or SMS included	Unlimited	15 days	$47.00	–	Yes	Not stated	Yes	See plan →
Holafly	Unlimited	14 days	$47.50	–	Yes	On first connection	No	See plan →
AiraloFair-use limit	Unlimited	15 days	$48.00	–	Yes	On first connection	Yes	See plan →
SailyFair-use limit	Unlimited	15 days	$48.99	–	Yes	On first connection	Yes	See plan →
aloSIMFair-use limit	Unlimited	15 days	$49.00	–	Yes	On first connection	Yes	See plan →
NomadFair-use limit	Unlimited	21 days	$49.00	–	Yes	On first connection	Yes	See plan →
Holafly	Unlimited	15 days	$50.50	–	Yes	On first connection	No	See plan →
SailyFair-use limit	Unlimited	16 days	$51.99	–	Yes	On first connection	Yes	See plan →
YesimFair-use limit	Unlimited	21 days	$52.32	–	Yes	Varies by plan	Not stated	See plan →
SailyFair-use limit	Unlimited	17 days	$53.99	–	Yes	On first connection	Yes	See plan →
Ubigi	50 GB	30 days	$55.00	$1.10	Yes	On first connection	Yes	See plan →
SailyFair-use limit	Unlimited	18 days	$55.99	–	Yes	On first connection	Yes	See plan →
SailyFair-use limit	Unlimited	19 days	$57.99	–	Yes	On first connection	Yes	See plan →
SailyFair-use limit	Unlimited	20 days	$59.99	–	Yes	On first connection	Yes	See plan →
Holafly	Unlimited	20 days	$60.90	–	Yes	On first connection	No	See plan →
SailyFair-use limit	Unlimited	21 days	$60.99	–	Yes	On first connection	Yes	See plan →
SailyFair-use limit	Unlimited	22 days	$61.99	–	Yes	On first connection	Yes	See plan →
SailyFair-use limit	Unlimited	23 days	$62.99	–	Yes	On first connection	Yes	See plan →
SailyFair-use limit	Unlimited	24 days	$63.99	–	Yes	On first connection	Yes	See plan →
UbigiFair-use limit	Unlimited	30 days	$65.00	–	Yes	On first connection	Yes	See plan →
SailyFair-use limit	Unlimited	25 days	$65.99	–	Yes	On first connection	Yes	See plan →
YesimFair-use limit	Unlimited	30 days	$66.00	–	Yes	Varies by plan	Not stated	See plan →
SailyFair-use limit	Unlimited	26 days	$67.99	–	Yes	On first connection	Yes	See plan →
SailyFair-use limit	Unlimited	27 days	$68.99	–	Yes	On first connection	Yes	See plan →
AiraloFair-use limit	Unlimited	30 days	$69.00	–	Yes	On first connection	Yes	See plan →
SailyFair-use limit	Unlimited	28 days	$69.99	–	Yes	On first connection	Yes	See plan →
SailyFair-use limit	Unlimited	29 days	$70.99	–	Yes	On first connection	Yes	See plan →
SailyFair-use limit	Unlimited	30 days	$71.99	–	Yes	On first connection	Yes	See plan →
Holafly	Unlimited	30 days	$73.90	–	Yes	On first connection	No	See plan →
aloSIMFair-use limit	Unlimited	30 days	$74.00	–	Yes	On first connection	Yes	See plan →
Vodafone Travel eSIMFair-use limitCalls or SMS included	Unlimited	30 days	$78.50	–	Yes	Not stated	Yes	See plan →
Vodafone Travel eSIMFair-use limit	50 GB	15 days	$92.50	$1.85	Yes	Not stated	Yes	See plan →
Holafly	Unlimited	60 days	$106.50	–	Yes	On first connection	No	See plan →
Holafly	Unlimited	90 days	$138.90	–	Yes	On first connection	No	See plan →

Prices in US dollars, read from each provider on October 5, 2026. They change often: confirm on the provider page before paying. Only price and fit to your route decide the order of results.

Each provider at a glance

One row per provider: its entry price, its best price per gigabyte and its cheapest unlimited plan for Japan.

Provider	Plans	Cheapest plan	Best price per GB	Cheapest unlimited	Hotspot	Validity starts
aloSIM	32	$3.501 GB · 1 day	$0.55/GB50 GB · 10 days	$5.001 day	Yes	On first connection
Ubigi	11	$3.501 GB · 3 days	$1.10/GB50 GB · 30 days	$25.008 days	Yes	On first connection
Holafly	11	$3.90Unlimited · 1 day	–	$3.901 day	Yes	On first connection
Saily	35	$3.991 GB · 7 days	$1.25/GB20 GB · 30 days	$3.991 day	Yes	On first connection
Airalo	17	$4.001 GB · 3 days	$1.20/GB20 GB · 15 days	$11.503 days	Yes	On first connection
Nomad	10	$4.001 GB · 7 days	$0.70/GB50 GB · 30 days	$11.003 days	Yes	On first connection
Yesim	13	$4.20Unlimited · 1 day	$1.32/GB30 GB · 30 days	$4.201 day	Yes	Varies by plan
Vodafone Travel eSIM	9	$12.003 GB · 10 days	$1.30/GB20 GB · 30 days	$12.003 days	Yes	Not stated

What to know about mobile data in Japan

Japan's networks cover cities, rail corridors and most towns with 4G and 5G. Signal thins out on mountain trails and small outlying islands. 3G is gone: the last network, NTT Docomo's, closed on 31 March 2026, so your phone needs 4G on bands the host network uses. Most travel eSIMs here are data only, which matters little day to day because messaging in Japan runs on LINE and other apps, not SMS.

Before you go

Find out which Japanese network your plan roams on, then check that operator's area map for hiking routes and remote islands. Coverage differs between networks outside the cities.
Download offline maps for any mountain area before you set off. Valleys and trails are where data disappears first.
Japan and South Korea are often visited on one trip. Compare a two-country plan against two single-country plans on our route page.

Regional and global plans that cover Japan

Useful when Japan is one stop among several. The country count is the provider's own list.

Provider	Product	Countries	Plan	Price	Region
Ubigi	Asia	26	0.5 GB, 1 day	From $2.00	Asia
Ubigi	Best Asia	17	1 GB, 1 day	From $2.00	Asia
Holafly	Asia	16	Unlimited, 1 day	From $3.90	Asia
Airalo	Asialink	18	1 GB, 3 days	From $4.00	Asia
Nomad	APAC (14 countries plan)	14	1 GB, 7 days	From $4.00	Asia
Nomad	China-Japan-Korea	3	1 GB, 7 days	From $4.00	See plan →
Saily	Asia & Oceania (22 countries)	22	1 GB, 7 days	From $4.99	See plan →
aloSIM	Asia	14	1 GB, 7 days	From $5.00	Asia
Ubigi	Best World	178	0.5 GB, 30 days	From $5.00	Global
Holafly	Japan and Korea	2	Unlimited, 1 day	From $5.90	See plan →
Holafly	Japan and China	2	Unlimited, 1 day	From $5.90	See plan →
Nomad	APAC (21 countries plan)	21	1 GB, 7 days	From $7.00	Asia
Ubigi	World	201	0.5 GB, 30 days	From $7.00	Global
Yesim	Asia Pacific	16	Unlimited, 1 day	From $8.40	Asia
Airalo	Discover	159	1 GB, 7 days	From $8.50	Global
Saily	Global (121 countries)	121	1 GB, 7 days	From $8.99	Global

Visiting more than Japan?

Add the other stops and the planner will tell you whether a regional plan, separate plans or a mix costs less.

Plan a route starting in Japan

Common routes

Japan and South Korea

Frequently asked questions

What is the cheapest eSIM for Japan?

On October 5, 2026, the cheapest plan we found was aloSIM with 1 GB, 1 day at $3.50. The lowest price per gigabyte was aloSIM: 50 GB, 10 days at $27.50, which is $0.55/GB.

Is there an unlimited data eSIM for Japan?

Yes. 8 of the providers we track sell unlimited plans for Japan; the cheapest is Holafly at $3.90 for 1 day. Unlimited plans often slow down after a daily amount, so read the fair-use note on the provider page.

Which regional eSIM plans include Japan?

23 of the 69 regional and global products we track list Japan: Ubigi Asia, Ubigi Best Asia, Holafly Asia, Airalo Asialink, Nomad APAC (14 countries plan), aloSIM Asia, Ubigi Best World, Nomad APAC (21 countries plan).

Will an older phone still work in Japan now that 3G is switched off?

Any phone that supports eSIM also supports 4G, so the real check is band support. All Japanese operators have closed 3G, the last on 31 March 2026, which means there is no fallback if your phone lacks the host network's LTE bands.

Do I need a Japanese phone number as a visitor?

Usually not. A data-only eSIM covers maps, translation and messaging. Some local booking services ask for a domestic number, and in that case your hotel can often make the reservation for you.

Other destinations in the region

Sources