Best Mobile Phone Plans in Japan for Foreigners (2025 Guide)

Getting connected in Japan is one of the first things you need to sort out after arriving. Whether you're a tourist, student, or long-term expat, choosing the right mobile phone plan can save you significant money while ensuring you stay connected. This guide breaks down the best mobile phone plans in Japan for foreigners, comparing every major option from budget MVNOs to full-service English-friendly carriers.

Japan's mobile market can be confusing — with major carriers, budget sub-brands, and dozens of MVNOs competing for your yen. The good news: you have more options than ever before, and many are designed with foreigners in mind.

Understanding Japan's Mobile Phone Market

Japan has four major mobile carriers: Docomo, AU (KDDI), SoftBank, and Rakuten Mobile. Each operates its own nationwide network and offers a range of plans. Docomo leads the market with roughly 50% market share, while Rakuten Mobile is the newest entrant and often the most foreigner-friendly.

!Understanding Japan's Mobile Phone Market - illustration for Best Mobile Phone Plans in Japan for Foreigners

In addition to the major carriers, there are dozens of MVNOs (Mobile Virtual Network Operators) that rent network capacity from the big players and resell it at lower prices. MVNOs like IIJmio, Mineo, OCN Mobile, and Sakura Mobile are popular choices for foreigners thanks to their lower costs and more flexible contracts.

There are also dedicated foreigner-friendly services like Sakura Mobile, Mobal, and GTN Mobile that specifically cater to non-Japanese residents and tourists, offering English support and accepting foreign payment methods.

For more context on managing finances in Japan, check out our guide to Banking and Finance in Japan for Foreigners.

For a detailed comparison of data-only and voice plans, Tokyo Cheapo's Japan SIM card guide is an excellent starting point. The Japan Handbook unlimited data comparison also provides in-depth analysis of hidden fees.

Types of Plans Available

Prepaid SIMs (Tourist/Short-Term)

Prepaid data SIMs are the simplest option for visitors. You can buy them at major international airports (Narita, Haneda, Kansai, Chubu) using only your passport. No residency card required.

!Types of Plans Available - illustration for Best Mobile Phone Plans in Japan for Foreigners

Key features:

• Available immediately upon arrival
• Data-only (no phone number in most cases)
• Typically 7 to 30 days validity
• Cost more per GB than postpaid plans
• No contract or ongoing commitment

Postpaid Monthly Plans (Long-Term Residents)

For foreigners living in Japan, a monthly postpaid plan offers much better value and often includes voice calling. These require a Residence Card (在留カード) and typically a Japanese bank account or credit card.

Key features:

• Lower cost per GB
• Includes phone number and calling
• Month-to-month or annual contracts available
• More carrier options

eSIM Plans

eSIM technology is becoming increasingly popular and lets you activate a plan without a physical SIM card. Many newer smartphones support eSIM, and several providers offer instant activation — perfect for arriving in Japan without needing to visit a store.

Top Mobile Phone Plans for Foreigners in Japan

Rakuten Mobile: Best Value for Data-Heavy Users

Rakuten Mobile has become one of the most popular choices among foreigners thanks to its transparent pricing and flexible tiered unlimited plan.

SAIKYO Plan pricing:

• 0–3GB: ¥1,078/month
• 3–20GB: ¥2,178/month
• Over 20GB: ¥3,278/month (unlimited)

All domestic calls are free when using the Rakuten Link app (available for iOS and Android). There's no minimum contract period and no cancellation fee. Rakuten accepts international credit cards and offers English support for online sign-up.

Requirements: Residence Card required for the standard plan. Japanese bank account or credit/debit card for monthly billing.

Best for: Expats and long-term residents who use a lot of data and want unlimited calling.

IIJmio: Best Budget Option

IIJmio consistently ranks as one of Japan's cheapest MVNOs. Plans run on both the Docomo and AU networks, providing excellent coverage nationwide.

Pricing highlights:

• 5GB voice SIM: ¥950/month
• 10GB: ¥1,500/month
• 25GB: ¥2,000/month
• 40GB: ¥3,300/month

The downside: IIJmio's customer service and contracts are in Japanese only. If you're comfortable reading Japanese or have someone to help, IIJmio offers exceptional value. Peak-hour speeds can also be slower than major carriers during lunch hours.

Best for: Foreigners fluent in Japanese who prioritize cost savings above all else.

Sakura Mobile: Best for English Support

Sakura Mobile is specifically designed for foreigners in Japan and stands out as the only major carrier with full English customer support. They accept international credit cards and can sometimes process applications with just a passport (no Residence Card required in some cases).

Plans:

• 5GB: ¥3,278/month
• 15GB: ¥4,378/month
• 40GB: ¥5,478/month

While pricier than domestic MVNOs, Sakura Mobile includes English-language setup assistance, free airport pickup of your SIM card, hotel delivery options, and responsive English-speaking customer service.

Best for: New arrivals, people unfamiliar with Japanese, or anyone who wants hassle-free English support.

For comprehensive advice on settling into Japan, see our Complete Guide to Daily Life in Japan for Foreigners.

Key Requirements for Foreigners

Getting a mobile plan in Japan as a foreigner requires different documentation depending on the plan type:

For prepaid tourist SIMs:

• Passport only
• No address registration needed
• Available at airports and electronics stores (Bic Camera, Yodobashi)

For postpaid monthly plans:

• Residence Card (在留カード) — the key requirement
• Registered address in Japan
• Payment method: Japanese bank account, Japanese credit card, or foreign card (provider-dependent)

Important note: Japan has strict ID verification laws. Foreigners without a Residence Card generally cannot get plans with phone numbers through standard domestic carriers. Sakura Mobile and Mobal work around this for some plans.

The "bureaucratic catch-22" many newcomers face: you need a phone number to register for services, but need an address to get a phone number. Sakura Mobile and Mobal's foreigner-friendly signup processes help bypass this issue.

For help understanding your visa status and residency requirements, check our Complete Guide to Japan Visa and Immigration.

Hidden Fees and Gotchas to Avoid

Japanese mobile plans often come with costs that aren't obvious upfront:

Activation fees: Most carriers charge ¥3,300–¥4,400 as a one-time setup fee. Some waive this for online applications.

SIM card fee: An additional ¥440–¥550 for the physical SIM card.

Device contracts: If you finance a phone through the carrier, early cancellation can trigger device buyout penalties exceeding ¥50,000.

"Unlimited" throttling: Plans marketed as unlimited typically throttle your speed to around 1 Mbps after consuming 10–15GB within a 72-hour rolling window. Read the fine print carefully.

Foreign credit cards: Many domestic carriers do not accept non-Japanese credit cards. Mobal, Sakura Mobile, and Rakuten Mobile are notable exceptions.

Calling costs on data-only plans: Some budget MVNOs require you to purchase a separate calling option; outgoing calls cost around ¥40 per minute on pay-as-you-go.

For more cost management strategies, see our Complete Guide to Cost of Living in Japan.

Buying Your SIM: Where and How

At the airport: The most convenient option for arrivals. IIJmio, Mobal, and SoftBank have counters at major international airports. Bring your passport.

Electronics stores: Bic Camera, Yodobashi Camera, and Yamada Denki carry a wide range of SIM cards and can sometimes process postpaid applications in-store with a Residence Card.

Online: Most providers allow online applications. Sakura Mobile and Rakuten Mobile offer full English online sign-up. Delivery takes 3–5 business days.

Convenience stores: Some prepaid SIM cards (including IIJmio data SIMs) are available at 7-Eleven, FamilyMart, and Lawson locations.

Which Plan Is Right for You?

• Arriving tourist (under 30 days): Buy a prepaid data SIM at the airport. IIJmio Japan Travel SIM or a SoftBank tourist SIM are solid options.
• New resident (just arrived, getting set up): Start with Sakura Mobile or Mobal for hassle-free English setup, then switch later if needed.
• Budget-conscious long-term resident: IIJmio (if comfortable in Japanese) or Rakuten Mobile for the best value.
• Data-heavy user: Rakuten Mobile's unlimited plan at ¥3,278/month is hard to beat.
• Prefer English support: Sakura Mobile is your best bet.

For more resources on working and living in Japan, visit Living in Nihon for practical guides on daily life. For Work in Japan provides excellent resources for foreigners navigating Japanese workplaces and lifestyle. Ittenshoku also offers helpful guidance for foreigners settling into life in Japan.

Final Thoughts

Japan's mobile phone market offers excellent options for foreigners at every budget level. The key decisions come down to:

1. How long are you staying? Short stay → prepaid; long stay → postpaid monthly.
2. How important is English support? If critical → Sakura Mobile or Mobal; if you can manage in Japanese → IIJmio or Rakuten.
3. How much data do you need? Heavy users benefit most from Rakuten Mobile's unlimited plan.
4. Do you need a phone number? Data-only SIMs are cheaper but limit calls and SMS.

Getting connected quickly is important for everything from finding housing to setting up your bank account. For a smooth start to life in Japan, prioritize getting a working SIM card within the first few days of arrival — it will make every other step of settling in much easier.

For more help navigating life in Japan as a foreigner, explore our Complete Guide to Moving to Japan and our comprehensive guides on Finding Housing in Japan and Working in Japan.