TrueMove H for Japan: Data Plans & How to Use It for Tourists

Thai travellers checking TrueMove H’s website before a Japan trip in 2026 often walk away confused. The international roaming pages are mostly in Thai, the plan codes change regularly, and it is genuinely hard to tell whether paying for a TrueMove H roaming pack makes more sense than simply buying a local Japanese eSIM on arrival. On top of that, Japan’s tourism infrastructure has evolved fast — 5G is now standard in every major city, eSIM activation takes under ten minutes from your hotel room, and physical SIM vending machines are stationed at every major airport. This guide cuts through the noise: here is exactly how TrueMove H roaming works in Japan, when it is worth using, and what alternatives give you more data for less money.

Why TrueMove H Roaming in Japan Works — But Has Limits

TrueMove H is one of Thailand’s largest mobile operators, sitting alongside DTAC (now merged with True Corporation) and AIS. For customers travelling to Japan, the appeal of TrueMove H’s roaming service is straightforward: you keep your Thai number, your contacts can still reach you, and you do not need to fuss with a second SIM or a new app. Your phone connects automatically to a Japanese partner network — typically SoftBank or NTT Docomo — the moment you land.

That automatic hand-off is genuinely seamless. Within a few minutes of leaving the arrivals hall at Narita (NRT) or Haneda (HND), you will have a data connection and your LINE messages will start coming through. For short trips where convenience outweighs cost — a four-day business trip, a weekend in Osaka — this is a perfectly reasonable way to stay connected.

The limitation is price per gigabyte. When you compare the cost of a TrueMove H roaming pack against a local Japanese eSIM from a provider like Airalo or IIJmio, the local option almost always gives you more data for fewer yen. Roaming is also subject to fair usage policies that can reduce speeds even before you hit the stated cap. For trips of a week or longer, or if you are streaming maps constantly on Tokyo’s subway system, the roaming approach starts to feel expensive.

The network quality itself is not the problem. Japan’s 4G LTE coverage is virtually ubiquitous across populated areas, Shinkansen lines, and major highways. 5G is now standard across Tokyo, Osaka, Kyoto, Nagoya, Fukuoka, Sapporo, and expanding along key rail corridors as of 2026. Whatever SIM or eSIM you use, connectivity is rarely the issue — the question is simply what you pay for it.

TrueMove H Roaming Plans for Japan: Prices, Activation and What to Expect

TrueMove H’s roaming packs for Japan are marketed as “Travel SIM” or “Roaming Pack” add-ons applied to your existing Thai SIM. As of the 2026 projections based on current offerings, two tiers are the most relevant for tourists.

7-Day “Roam Japan” Pack

• Data: 5 GB at 5G/4G speeds
• Validity: 7 days from activation
• Cost: Approximately 399 THB (roughly 1,600 JPY at current exchange rates)

15-Day “Roam Japan Plus” Pack

• Data: 10 GB at 5G/4G speeds
• Validity: 15 days from activation
• Cost: Approximately 699 THB (roughly 2,800 JPY at current exchange rates)

How to Activate

TrueMove H roaming packs can be activated in two ways. The first is via USSD code: dial *118*399# for the 7-day pack (the three digits match the THB price; confirm the exact code for your target plan on the TrueMove H website before you travel). The second method is through the True ID app, available on iOS and Android, where you navigate to “International Roaming” and select your Japan pack.

1. Confirm international roaming is enabled on your TrueMove H account before departure — call True’s customer line or check in the True ID app.
2. Dial the USSD code or activate via True ID app. Do this while still in Thailand for the smoothest experience.
3. Wait for a confirmation SMS from TrueMove H.
4. After landing in Japan, go to your phone’s Settings and enable Data Roaming.
5. Your device will automatically select a partner network (SoftBank or NTT Docomo). Allow two to three minutes for registration.

For additional data top-ups once you exhaust the pack, the True ID app handles this remotely. Once the high-speed allocation is used up, speeds drop to 128–256 kbps — enough to send messages but not enough to load Google Maps quickly or stream anything. The official TrueMove H international roaming page is at https://www.truemoveh.com/roaming/inter/ — it is in Thai, so run it through Google Translate or Chrome’s built-in translation tool.

Device compatibility is worth checking before you leave. Japanese networks use LTE bands 1, 3, 8, 19, 21, 28, and 42, plus 5G bands n77, n78, n79, and n257. Most flagship smartphones sold globally in the last three years support these bands, but budget Android devices purchased in Thailand may not support bands 19 or 21, which affects rural coverage on Docomo’s network.

Better Value Alternatives: Japan Physical SIM Cards for Tourists

If you are willing to swap SIMs on arrival — or order ahead of time — Japan’s physical tourist SIM market offers excellent value. These are data-only cards, meaning no Japanese phone number for voice calls, but LINE, WhatsApp, and FaceTime Audio work perfectly over data.

IIJmio Japan Travel SIM

IIJmio runs on NTT Docomo’s network, which gives it the widest rural coverage of any tourist SIM option. Docomo’s infrastructure reaches mountain towns, rural Tohoku, and the Hokkaido interior where other networks can be patchy. Projected 2026 pricing:

• 3 GB / 7 days: approximately 1,600 JPY
• 5 GB / 30 days: approximately 2,200 JPY
• 10 GB / 30 days: approximately 3,200 JPY

You can buy IIJmio SIMs at vending machines in the arrivals halls at Narita, Haneda, Kansai (KIX), and Chubu (NGO) airports, or at electronics retailers like Bic Camera and Yodobashi Camera. APN setup is manual if it does not auto-detect: APN name iijmio.jp, username iijmio, password iijmio. Official site: https://t.iijmio.jp/en/

Sakura Mobile

Sakura Mobile operates on SoftBank’s network and is particularly strong in urban corridors. Their tourist SIM and eSIM options in 2026 cover most common trip lengths:

• 8 days / 5 GB: approximately 2,900 JPY
• 15 days / 10 GB: approximately 3,900 JPY
• 30 days / 20 GB: approximately 5,500 JPY
• 90-day unlimited plans from around 10,000 JPY

Sakura Mobile has airport pickup counters at both Narita and Haneda, or you can order online for hotel delivery. Their eSIM option activates via QR code instantly after purchase. Official site: https://www.sakuramobile.jp/

Mobal

Mobal’s unique selling point among tourist SIM providers is that their plans include a real Japanese phone number — useful if you need to make reservations at restaurants that do not accept foreign numbers, or call a ryokan to confirm late check-in. Plans run on SoftBank. Projected 2026 pricing:

• 30-day unlimited data + Japanese number: approximately 5,999 JPY (plus roughly 3,000 JPY activation fee)
• 90-day unlimited data + Japanese number: approximately 14,999 JPY (plus activation fee)

The activation fee is a one-time cost per SIM. For travellers who genuinely need a local number, it is worth it. For everyone else, stick with IIJmio or Sakura Mobile. Official site: https://www.mobal.com/japan-sim-card/

eSIM Options for Japan in 2026: Fast, Paperless, Ready Before You Land

eSIMs have moved from novelty to mainstream since 2024. In 2026, virtually every mid-range and flagship smartphone supports eSIM — iPhone XS and newer, Google Pixel 3 and newer, recent Samsung Galaxy models, and most current Android flagships. The advantage over physical SIMs is that you purchase, download, and activate entirely from your couch before the trip begins.

Airalo Japan eSIM

Airalo is one of the most widely used eSIM marketplaces globally. Their Japan-specific “Moshi Moshi” plans in 2026 are priced as follows (converted to approximate JPY):

• 1 GB / 7 days: approximately 4.50 USD (roughly 670 JPY)
• 3 GB / 15 days: approximately 9.00 USD (roughly 1,350 JPY)
• 10 GB / 30 days: approximately 20.00 USD (roughly 3,000 JPY)
• 20 GB plans also available at higher tiers

Official site: https://www.airalo.com/japan-esim

Other providers worth comparing include Ubigi and Nomad, both of which run on major Japanese network infrastructure. Prices across these platforms have become increasingly competitive through 2025–2026 as the market matured.

How to Activate a Japan eSIM

The process takes under ten minutes once you have the QR code:

1. iPhone: Settings → Cellular → Add eSIM → Use QR Code. Point your camera at the QR code from the provider.
2. Android (Google Pixel / Samsung): Settings → Network & internet → SIMs → Download a SIM → Scan QR code.
3. Label the new eSIM something clear, like “Japan Travel.”
4. Set your primary SIM (TrueMove H or home carrier) for calls and SMS, and the Japan eSIM for data only.
5. Enable data roaming on the Japan eSIM plan in settings.

Do not activate the eSIM before you need it if it has a fixed validity period that starts on activation rather than first use — check the provider’s terms carefully. Airalo’s Japan plans start counting from the moment of activation, so activate on the day you depart or land.

At Narita and Haneda airports, providers like Sakura Mobile have counters where staff can walk you through eSIM setup in person if you prefer a guided process. Expect 5–15 minutes during off-peak hours or up to an hour during busy morning arrival waves from Asia and afternoon arrivals from Europe and North America. Buying online first is always faster.

Pocket WiFi Rental: The Shared-Data Solution for Groups and Multi-Device Travellers

If you are travelling with a partner, a family, or a group, or if you need to keep a laptop connected while working from a café, pocket WiFi rentals still make sense in 2026. One device creates a WiFi hotspot that everyone connects to simultaneously.

The device itself is roughly the size of a thick business card wallet and fits in a jacket pocket. Battery life on 2026 models typically runs 8–12 hours of continuous use, and most providers include a USB-C charging cable.

Major rental providers in 2026 include:

• Japan Wireless: https://www.japan-wireless.com/
• Ninja WiFi: https://ninjawifi.com/
• PuPuRu WiFi: https://www.pupuru.com/en/
• AnyFone Japan: https://anyfone.jp/

Typical daily rates range from 800 JPY to 1,500 JPY for unlimited or high-cap plans (50 GB or more per month). Longer rentals reduce the daily rate. Optional insurance covering loss or damage typically costs 200–300 JPY per day — worth taking if you are doing outdoor activities.

Pickup is available at airport counters at Narita, Haneda, Kansai, Chubu (NGO), Fukuoka (FUK), and Sapporo New Chitose (CTS), or the device can be delivered to your hotel before arrival. Return is via a prepaid envelope dropped in any post box in Japan — straightforward and available at every convenience store.

The main inconvenience is that you are now managing an extra device with its own battery. On a 12-hour day walking Kyoto’s Higashiyama district with map apps running continuously, a pocket WiFi battery can run dry by late afternoon if you forget to top it up. Always carry a power bank.

Free WiFi in Japan: Where It Works and Where It Lets You Down

Free public WiFi exists across Japan in useful locations, but it should not be your primary connectivity plan. It works well as a supplement when you are stationary, not as a replacement for mobile data.

Where free WiFi is reliable:

• 7-Eleven, FamilyMart, and Lawson convenience stores nationwide — registration required on first use but straightforward
• JR station concourses at major stations — speeds are decent for maps and messaging
• Starbucks, Tully’s Coffee, McDonald’s — consistent and reasonably fast
• Hotels and ryokans — virtually all accommodation provides free WiFi as standard in 2026
• Tourist information centres and department stores in major cities

Where free WiFi falls apart:

• Inside subway trains and tunnels (you need mobile data for navigation underground)
• Rural areas, mountain trails, and smaller towns
• Crowded tourist sites where every visitor is hammering the same hotspot

The Japan Connected-free Wi-Fi app (available on iOS and Android) aggregates thousands of public hotspots and simplifies initial registration so you only do it once. Download it before departure. That said, do not rely on it as your sole internet source — it is genuinely useful as a data-saving supplement when you are sitting still, not as a navigation tool while moving through an unfamiliar city.

2026 Budget Reality: What Connectivity Actually Costs in Japan

Here is an honest comparison of what different connectivity options cost for a standard two-week Japan trip in 2026. All prices in JPY.

Budget Tier (under 2,000 JPY for two weeks)

• Airalo eSIM 3 GB / 15 days: approximately 1,350 JPY
• IIJmio 3 GB / 7 days (two separate purchases): approximately 3,200 JPY total — slightly above budget tier but close
• Best for: light users, travellers who stay in hotels with strong WiFi and only need data for maps and messaging outdoors

Mid-Range Tier (2,000–5,000 JPY for two weeks)

• TrueMove H “Roam Japan Plus” 10 GB / 15 days: approximately 2,800 JPY — convenient, no SIM swap needed
• Sakura Mobile 15 days / 10 GB SIM or eSIM: approximately 3,900 JPY — local network, reliable urban and transit coverage
• Airalo 10 GB / 30 days eSIM: approximately 3,000 JPY — best data-per-yen in this tier
• Best for: most tourists — covers heavy map usage, social media, photo uploads, and video calls without hitting the cap

Comfortable Tier (5,000–15,000 JPY for two weeks)

• Mobal 30-day unlimited + Japanese number: approximately 8,999 JPY (including activation fee) — makes sense if you need a local number for restaurant reservations
• Pocket WiFi rental at 1,000 JPY/day for 14 days: approximately 14,000 JPY — justified for groups of three or more sharing the cost
• Sakura Mobile 30 days / 20 GB: approximately 5,500 JPY — generous data, good for heavy users or those working remotely
• Best for: families, groups, remote workers, or anyone who needs a Japanese phone number

The overall trend since 2024 has been more data for the same price or lower price per GB, driven by competition in the eSIM market. A plan that offered 10 GB for 4,000 JPY in 2024 is now likely to offer 15 GB at the same price point in 2026.

Practical Setup Checklist Before You Fly

Connectivity problems in Japan are almost always caused by things done wrong before departure, not by Japan’s network quality. Run through this list before you board.

1. Check your phone is unlocked. A SIM-locked phone will not accept a Japanese SIM card. Check with your carrier at home before leaving.
2. Verify eSIM compatibility. If using an eSIM, confirm your device model supports it. Check Apple’s eSIM compatibility list or your Android manufacturer’s spec page.
3. Download Google Maps or Apple Maps offline tiles for Japan. Select the regions you plan to visit — Tokyo, Osaka, Kyoto — and cache them. This works in the subway even with no signal.
4. Download offline translation packs. Google Translate and DeepL both support Japanese offline mode. The camera translation feature in Google Translate works on menus and signs even without data.
5. Save emergency numbers. Police in Japan: 110. Fire and ambulance: 119. These calls work from any phone, even data-only SIMs, via nearby public phones or by asking for help.
6. Check your TrueMove H APN settings if roaming. Occasionally Japanese partner networks require a manual APN reset. TrueMove H customer support can provide the correct settings.
7. Pack a power bank of at least 10,000 mAh. A full day of navigation, photography, and messaging drains a smartphone battery fast. Pocket WiFi users need two batteries effectively — phone and hotspot device.
8. Activate your eSIM before leaving home. Install the eSIM profile while on your home WiFi so the Japan data plan is ready to switch on the moment you land, without needing airport WiFi to complete setup.

The Japan Connected-free Wi-Fi app is worth installing as a last item on this checklist. Set it up while at home so the initial registration is done — you will thank yourself when you are standing at Shinjuku Station at 11 pm, navigating to a back-alley ramen counter, and your data briefly drops out near a basement entrance.

Frequently Asked Questions

Can I use my TrueMove H SIM in Japan without buying a roaming pack?

Technically yes, but the per-megabyte charges without a roaming pack are extremely expensive. Always activate a specific Japan roaming pack via the True ID app or USSD code before or shortly after arrival. Using unpackaged roaming data for a two-week trip could cost several times more than the pack price.

Do Japanese tourist SIM cards come with a phone number for calls?

Most tourist SIM and eSIM options in Japan — including IIJmio and Airalo — are data-only. They do not include a Japanese phone number. Voice calls are not possible unless you use VoIP apps like LINE or WhatsApp. Mobal is the main exception, providing a real Japanese number as part of its plans.

Where is the easiest place to buy a Japan SIM card on arrival?

SIM card vending machines and counters are located in the arrivals halls of all major international airports: Narita (NRT), Haneda (HND), Kansai (KIX), Chubu (NGO), Fukuoka (FUK), and Sapporo New Chitose (CTS). IIJmio and Sakura Mobile are both available at Narita and Haneda. Bic Camera and Yodobashi Camera stores in city centres also stock physical SIM cards.

Is 5G available in Japan for tourist SIM and eSIM cards in 2026?

Yes. Japan’s 5G network expanded significantly through 2025 and is now standard in all major cities including Tokyo, Osaka, Kyoto, Nagoya, Fukuoka, and Sapporo. Most tourist eSIM and SIM providers advertise 5G/4G access. Coverage along Shinkansen routes and in rural areas may still be primarily 4G LTE, which remains fast and reliable.

What happens if I run out of data on my TrueMove H roaming pack in Japan?

Once your high-speed data allowance is used, speeds drop to approximately 128–256 kbps for the remaining validity period. This is sufficient for text messages but too slow for navigation or streaming. You can purchase additional data top-ups through the True ID app remotely while in Japan. Alternatively, connect to free WiFi at convenience stores or JR stations to conserve your remaining data.

📷 Featured image by Kelvin Zyteng on Unsplash.