Japan's Cheapest Cellphone Plans Compared

First time researching Japanese cellphone plans, or considering switching out that expensive SIM in your phone? Your two main options for Japan cellphone plans are:

1. The big mobile players like Docomo, SoftBank, and AU
2. The MVNO brands that piggyback on the networks belonging to the big players (these are often cheaper and more flexible)

Let’s take a closer look at the current options, as well as info on billing and moving your number to a new provider.

Note: This article is for Japan residents looking for new cellular plans. For a guide to prepaid tourist and short-term SIMs, see our article on Prepaid SIM Card Options for Visitors to Japan.

What’s the difference between a major operator and an MVNO?

The big names

There are four major operators in Japan: AU, Docomo, SoftBank, and Rakuten Mobile. These are companies that have either built out their own networks, or have purchased a company with an existing network. They’re the big, established brands with fancy shops and slick advertising, but MVNOs often have better contract conditions and lower prices.

The MVNOs

MVNO stands for mobile virtual network operator, which means an operator uses the network of one of the major players. For most MVNOs in Japan, this means using an AU, Docomo, or SoftBank network. When you activate an MVNO SIM, the parent network will be displayed in the top corner of your phone.

As far as MVNOs go, there is a wide range of options, many with better deals and service than the majors. There are too many providers to list them all, but a few things to consider when signing up are:

• How much data you get
• Whether you have a fixed or month-to-month contract
• The cost of canceling your contract
• What level of support they have (particularly English-language support if you aren’t comfortable in Japanese)

Data + voice vs. data-only SIMS?

Data only

You don’t have to get a plan with a phone number. It’s possible (and cheaper) to get a data-only SIM. The main difference is that there is no mobile number attached to your phone. That means no calls, and no SMS (unless you can add SMS as an option). 

SMS is still the most common method for verifying your phone when you sign up for apps like Uber Eats, or as a security check when using internet banking. 

With a data SIM, you can get apps to allow local calling, but they’re clunky, not that cheap, and you sometimes can’t use them to call toll-free or emergency numbers. 

Data and voice

This is the full mobile package, with a real phone number, SMS capability, and data.

Note that it’s not customary for data + voice plans to include free talk minutes or texts. Receiving calls and texts is free, but making calls can be expensive. The standard price is around ¥40 per minute. Depending on the provider, they might have free or discounted calls to numbers on the same network. If unlimited talk minutes are important to you, look for a 掛け放題 (kakehodai) add-on option.

Domestic texts vary from ¥3 to ¥30 per text, so it’s best to use your phone to receive texts and use a messaging app for keeping in touch with friends, family, and colleagues.

Comparing data + voice plans

Regardless of the operator, all of the cellular service providers charge a set-up fee of approximately ¥3,300 (Sakura Mobile’s set-up is a little different, but they still collect the fee). All billing is monthly.

The following comparison table is not exhaustive. We’ve left out low-volume data plans under 4GB, although some providers may have plans as low as 1GB per month or even zero data if you just want to keep your phone number while out of the country. The major carriers have plans out the wazoo, so we included just their unlimited plans.

Unless otherwise indicated, plans are 4G-LTE. All prices in the table include 10% consumption tax. Information is subject to change.

Provider	Data + voice plans (tax incl.)	Network	Min. contract	Cancellation	Free contract suspension	English support	Link
MVNO providers
	5GB: ¥3,190 10GB: ¥3,630 30GB: ¥4,378	SoftBank	No contract	¥0	×	✔	Pricing info
	5GB: ¥3,278 25GB: ¥4,378 40GB: ¥5,478 (5G where available)	Docomo	No contract	¥0	✔	✔	Pricing info
	5GB: ¥950 25GB: ¥2,000 45GB: ¥3,300 (5G where available)	Docomo/AU	1–2 mths	¥0	×	×	Pricing info
	7GB: ¥2,530 13GB: ¥3,850 30GB: ¥4,730 (5G where available)	Docomo	None	¥0	×	×	Pricing info
Major cellular service providers
	Unlimited Saikyo Plan: ¥3,278 (5G where available)	Rakuten	None	¥0	×	×	Pricing info
AU	Unlimited Max + 4G/5G data: ¥7,458	AU	1 year	¥990	×	Limited	Pricing info
Docomo	Unlimited eximo plan: ¥7,315	Docomo	1 year	¥1,100	×	×	Pricing info
SoftBank	Merihari unlimited plan: ¥7,425	SoftBank	None	¥0	×	×	Pricing info

Notes on above:

• Mobal — When your monthly data cap is reached, data is still available until the end of the month at reduced speeds (around 200 kbps). Domestic SMS at ¥33 each. No resident card or visa requirements. Suspend your service for  ¥900 per month. New Voice Lite plan available — perfect if you just need a short-term option to receive an SMS for gig tickets or online account activation. eSIMs also available. Bulk of profits go to charity.

Also, if you’re looking to find an easy way to pay your bill, Mobal has you covered with the Mobalpay credit card. This prepaid card is supported by Mastercard and can be used for online and physical payments. 

• Sakura Mobile — Although there are no cancellation fees, there is an all-in-one ¥5,500 activation fee. Flexible payment options. Student discounts. There is also a Sakura Mobile voice and data eSIM available.
• IIJmio — Often run promotions with additional data.
• Rakuten Mobile — The most recent major provider to launch their own network. 3GB and 20GB price tiers also available. Speeds may differ depending on your area. Unlimited local calls and texts through the Rakuten Link app.

With some of the other plans mentioned in this article, it may be possible to reduce call rates by using data-based apps. Although not explicitly stated above, many plans also allow data sharing with partners and family members.

Note that other plans may be available in addition to those listed above. Tethering may also be possible. Data services may continue, though throttled, once the monthly limit has been reached. 

Data-only SIMs

As above, there are certain things that all plans share. For example, they mostly have the same starting fee of roughly ¥3,300. Data-only SIMs are usually cheaper and have no set contract period or cancellation fees. Although they don’t include voice calling using the cellular network, some will allow you to add the ability to send SMS for a small monthly fee of up to around ¥200 per month.

Once again, we have omitted low-data plans under 4GB/month. Check the provider sites directly if this is what you want. If you spend all of your time at home with Wi-FI, you might only need 2GB, but if you do any tethering or spend time away from home, that data will be gone in a flash.

All prices listed include 10% consumption tax. Info is subject to change.

Provider	Data plans (tax incl.)	English support	Monthly SMS fee	Link
	5GB: ¥2,728 25GB: ¥3,838 40GB: ¥4,928	✔	¥0	Pricing info
	5GB: ¥860 25GB: ¥1,950 45GB: ¥3,240	×	¥40—¥70	Pricing info
	5GB: ¥1,265 20GB: ¥1,925 50GB: ¥2,695	×	¥0—¥198	Pricing info
	7GB: ¥1,760 30GB: ¥3,960 50GB: ¥5,280	×	¥165	Pricing info

Notes on above:

• Sakura Mobile — Activation fee of ¥5,500. Unused data allocated to the following month. Flexible payment options available. eSIMs available.
• IIJmio — SMS is an optional extra; prices provided are for the Docomo-only plan. Japan eSIMs also available.
• Mineo — 20GB data and data-and-voice plans available. Monthly SMS costs depend on the chosen carrier.

With some of these mobile network providers, it may be possible to split one data plan among multiple SIM cards — this is great for families/couples. Tethering may also be possible. Ask when applying. Note that other plans may be available in addition to those listed above.

Unlimited cellphone plans in Japan

Some packages that are described as offering unlimited data generally have a daily fair usage cap, after which speeds slow down — meaning you can still do stuff on the internet, but maybe only at a (pre-climate change) glacial pace. There are also hard limits on tethering and data sharing. For example, the unlimited plan on SoftBank has a limit of 50GB. Docomo has no limit on tethering.

At the moment, none of the MVNOs offers a true unlimited plan, although the standard volume of data has risen hugely in recent years. For example, the top IIJmio plan is now 55GB (up from 12GB), and Nifmo has a 50GB plan. We expect these to get another bump in the near future, so unless your cellphone is your sole home internet connection, you’d be doing well to chew through this much data in a month.

Payment options

One of the most frequently asked questions is how to pay for a voice + data or data-only SIM contract in Japan. All of the providers accept Japanese credit cards, but unfortunately, some do not accept international credit cards. Mobal and Sakura Mobile are okay with international cards and also allow payment by cash at convenience stores. For all the others, ask at sign-up.

Number portability: How to keep your number when switching carriers in Japan

Rather than give up your phone number every time you want to switch cellular providers, you can take your number with you (with many carriers, anyway). This system is known as mobile number portability (MNP), or porting for short. Most of it can be done online or over the phone, but this is Japan — so of course, it’s all in Japanese. To keep your number while switching carriers, follow these steps.

1. Apply for an MNP number through your current carrier. Don’t cancel your plan before doing this!
2. Sign up for a plan with your new carrier, then select the option for switching and enter your MNP number.
3. Wait for your new SIM card to arrive—don’t remove the old one yet!
4. With your old SIM still inserted, call the free number or follow a link provided by your new carrier for activating the new SIM.
5. Enter your phone number and some digits from the card your new SIM is attached to.
6. As a last step, swap out the old SIM for the new SIM and follow the instructions for setting up your APN (Android) or profile (iPhone).

More options for mobile internet connections in Tokyo

Watch our short YouTube video on getting hooked up with wifi in Japan and investigate some of the best wifi router rental options. You might also consider cellular roaming, or an international eSIM. 

Japan cellphone plans FAQ

What’s the best major Japanese cellphone network?

AU, Docomo, and SoftBank are generally considered to be fairly comparable in terms of coverage and reliability. While Docomo has arguably the most extensive network, they also have the most customers, which means that coverage can occasionally be unreliable in crowded areas. Having said that, you’ll generally stay connected in most parts of the country.

AU is considered to have better coverage than SoftBank, but SoftBank is known for its consistent network quality. When picking a plan, it’s best to check the coverage in your particular area and find a package that suits your needs and budget. 

Can I switch between plans?

Yes, providers like Sakura and Mobal will allow you to switch plans via your online account. If you’re leaving the country temporarily, these companies also allow you to suspend your account until you get back. 

Do Japanese cellphone companies offer eSIMs instead of physical SIM cards?

Yes, companies like Mobal and Sakura Mobile offer eSIMs as an alternative to physical SIM cards. Just make sure to select an eSIM at the time of purchase, and double-check your phone’s compatibility beforehand. 

Is it possible to get a phone with my cellular plan in Japan?

Yes, all of the major providers as well as some of the smaller MVNOs like Mineo and NifMo offer bundles that include a phone with your service plan, if that is what you want.

While we do our best to ensure that the information here is correct, it is subject to change. This article was originally published on December 2, 2015. Last updated by Patrick Balfe in April 2025.