Pocket wifi in Japan: what a rental costs, and when an eSIM is cheaper

How much is pocket wifi in Japan?

Pocket wifi in Japan starts at 440 yen a day for 1 GB a day at NINJA WiFi, one of the big rental companies, and runs to 1,980 yen a day for its unlimited SoftBank plan. Those are the company's own figures, read on its site on 9 November 2026. A Japan eSIM for a whole month costs less than a week of the cheaper router plans: Nomad sold 10 GB for 30 days at $16 when we read its site in August 2026.

So the honest answer to "pocket wifi or eSIM in Japan" is that the eSIM is cheaper for one person, and the router is about groups, locked phones and, unusually for Japan, knowing which network you are on. This is desk research. We have not rented a router.

Japan pocket wifi prices, from the rental company

NINJA WiFi publishes its rates in yen. We have not converted them, because the exchange rate moves; do it on the day you book.

The 7-day figure for the 3 GB plan is NINJA WiFi's own example. The rest are our multiplication of its daily rates. They exclude insurance, which it lists at 330 yen a day for full cover or 440 yen a day with a spare battery, and it describes insurance as optional. Its unlimited plan may be slowed if you pass roughly 10 GB in a day or 300 GB in a month.

Daily rates count calendar days, not 24-hour periods. NINJA WiFi's example: collect at 5 p.m. on Monday and return on Tuesday morning, and you pay for two days.

What a Japan eSIM costs instead

These are verified prices from our Japan guide, read from each seller's own site between 13 and 18 August 2026, in US dollars.

The comparison is not like for like. The cheapest router plan gives you 1 GB every day; a 10 GB eSIM gives you 10 GB for the month. Our Japan guide's view is that most visitors use three to five gigabytes a week, because hotel wifi absorbs a lot. On that pattern, a 10 GB eSIM covers a fortnight, while the router charges you daily for data you mostly will not use. A family of four sharing one unlimited router is a different sum, and there the router can come out ahead of four separate eSIMs.

Pocket wifi vs eSIM in Japan: the network question

This is the part that is particular to Japan. Our research credits NTT Docomo with the widest rural, mountain and island coverage, and none of the travel eSIMs we track for Japan is sold to you as a Docomo product. Airalo, Saily, Nomad and Holafly publish no host network there.

A rental router usually tells you. NINJA WiFi names SoftBank on its standard plans and sells separate Docomo 5G unlimited options, though it pitches those at travellers staying mostly in cities. If your trip runs to Hokkaido, the Japan Alps or the smaller islands, a router on a named network is one of the few ways to choose your carrier without buying a local SIM card. Check the network on the specific plan before you book.

Can you get pocket wifi at Haneda or Narita?

NINJA WiFi says it has counters at 10 major Japanese airports and lets you collect in one and return in another, for example Hokkaido to Okinawa. The article we read does not list the airports, so confirm yours before you fly. Its return options are an airport counter, an airport return box, its Shinjuku counter in Tokyo, or delivery for an extra 550 yen.

If you arrive without anything booked, our Haneda Airport and Narita Airport pages cover the SIM counters and vending machines there. Haneda's Terminal 3 has free wifi with no session limit, which makes it a comfortable place to install an eSIM after landing.

The costs that catch people out

NINJA WiFi's own price article lists the fees that turn a cheap rental into an expensive one:

Late return without notice

an extra 1,617 yen a day. With a day's notice, an extension is the normal rate

Lost router

40,000 yen. A lost spare battery is 3,000 yen

Theft or loss

you are told to get a police certificate and tell the company straight away

An eSIM has none of these, because there is nothing to return. It does need a phone that supports eSIM and is not carrier-locked. Check yours on our eSIM compatible phones list, or read what an eSIM is first.

What about Sakura Mobile pocket wifi?

Sakura Mobile's pocket wifi page lists monthly plans rather than daily rentals: 100 GB on SoftBank at 5,478 yen a month including tax, with a 5,500 yen line activation fee. That page is aimed at longer stays. Its short-term travel prices are on a separate page we did not read, so we have no daily figure for it.

Our verdict for Japan

Travelling alone or as a couple with eSIM phones: buy an eSIM. A 10 GB plan at $16 to $18 covers most trips, and nothing needs collecting or returning. Travelling as a family that moves as one, or with a phone that cannot take an eSIM: a router makes sense, especially if you pick one on a named network for rural travel. Budget for insurance and return it on time. For more detail on providers, see our Nomad Japan review and where to buy a SIM card in Japan.