Japan and Thailand Trip: Arrival Cards, Medicines and Local Transport

Meta description: Combining Japan and Thailand on one trip? Here’s the TDAC filing window, vape/medicine rule differences, and the rental-scooter question.

Who this is for, and a passport disclaimer

This guide is written for a general international traveler flying between Japan and Thailand on the same trip—commonly Tokyo/Osaka to Bangkok/Phuket, or the reverse. It assumes visa-exempt entry on both sides, which depends on your nationality. Japan and Thailand each maintain their own visa-exemption lists and permitted stay lengths (Thailand’s visa-exempt stays are commonly 30–60 days depending on nationality and entry point; Japan’s are commonly up to 90 days for many passports)—confirm your own passport’s status with both governments before assuming any of this applies to you.

Entry permission vs. arrival form for both countries

Japan: for visa-exempt nationalities, entry permission is granted on arrival. The separate arrival/customs declaration can be pre-filed through Visit Japan Web, the Digital Agency’s official service, generating a QR code for faster immigration and customs.

Thailand: for visa-exempt nationalities, entry permission again comes on arrival under Thailand’s visa-waiver arrangements. Separately, all non-Thai nationals—including visa-exempt tourists, visa holders, and long-term residents—must complete the TDAC (Thailand Digital Arrival Card) online before entry, by air, land, or sea. TDAC replaced the old paper TM6 form entirely; there is no option to file a paper version instead. TDAC is free to submit through the official portal.

Unlike Japan’s Visit Japan Web, which is optional, TDAC is mandatory for every foreign arrival into Thailand, so don’t treat it as a nice-to-have the way you might treat the Japan form.

Filing order and windows

1. Visit Japan Web (if Japan is your first leg) — no fixed earliest date; complete any time before arrival, ideally a few days ahead.
2. TDAC (Thailand Digital Arrival Card) — as of 2026, TDAC can only be completed within 3 days (72 hours) before arrival in Thailand. This is a tighter window than Taiwan’s TWAC, so don’t file it too early—if you try more than 3 days out, the system won’t accept it. Note that once submitted, core details (name, passport number, date of birth, nationality) cannot be edited; only minor details like flight times can be updated. Double-check before submitting.

If your route is Thailand-first-then-Japan, file TDAC in the 3-day window before your Thailand arrival, then complete Visit Japan Web before your Japan arrival on the second leg.

Through-ticket vs. separate-ticket baggage and missed connections

On a through-ticket covering both the Japan and Thailand segments (single booking, interline or codeshare), checked baggage is normally tagged to your final destination without a reclaim requirement at the connecting airport, barring a terminal change. If a covered connection is missed due to a delay on the operating or marketing carrier’s side, that airline is generally responsible for rebooking and handling your bag.

On separate tickets (a common pattern on this route, since several low-cost carriers serve Japan–Thailand independently), your bag is checked only to the first arrival airport. You must collect it, clear customs, and check in fresh for the second flight—there’s no automatic rebooking or bag protection if you miss the connection, and any costs are yours unless you have separate trip-delay coverage. Given how many Japan–Thailand itineraries are built on two unrelated budget fares, confirm which situation you’re actually in before you count on a tight connection.

Power banks and dangerous goods by operating airline

The standard international rule applies on both legs: lithium batteries and power banks in carry-on only, roughly 100Wh unrestricted in personal quantity, 100–160Wh requiring airline approval (commonly capped at two spares), and above 160Wh prohibited on passenger aircraft.

As with the other routes in this set, the operating carrier’s own policy on top of that baseline is what matters day to day. Japan–Thailand is served by a mix of full-service and budget carriers, and their power bank rules (count limits, in-flight charging restrictions, storage requirements) aren’t identical. If your outbound and return flights are on different operating carriers, check each one’s dangerous-goods page separately.

Payment, transit card, eSIM and 2FA changeover

Japan’s IC cards (Suica, Pasmo, ICOCA) and Thailand’s transit payment options (Bangkok’s Rabbit Card for BTS/MRT, or increasingly QR-code and contactless payment on Thai transit) are separate systems that don’t cross over—plan on setting up a fresh local option in Bangkok even if you were fully cashless with an IC card in Japan.

Thailand is more cash- and QR-payment-dependent than Japan for smaller vendors, street food, and some taxis, even though card and mobile payment acceptance has grown substantially in tourist areas. Carry some Thai baht as a backup, especially outside central Bangkok.

A Japan-only eSIM or physical SIM stops working as soon as you land in Thailand. Set up your changeover before the flight: install a Thailand-specific eSIM (or a regional plan covering both countries) using Wi-Fi before or right after landing. For two-factor authentication, prefer an app-based authenticator over SMS codes tied to your home number—SMS delivery to a home-country number can be unreliable once you’re on a new local SIM, which is exactly the moment you might need to access a bank account or rebook a flight.

Medication and prohibited-item differences, including vapes

This is one of the sharper contrasts in this pilot set. Thailand bans e-cigarettes and vaping devices outright—importing, possessing, or using a vape (including devices and e-liquid) is illegal in Thailand for both residents and tourists, and enforcement includes confiscation and fines, occasionally more serious consequences depending on circumstances. Japan’s rules on vaping devices are comparatively permissive for personal-use nicotine vapes and heat-not-burn products (though local smoking-area rules apply), which means a device that traveled with you through Japan without issue can become a legal problem the moment you land in Thailand. If you vape, plan to leave the device and any e-liquid behind before the Thailand leg, or don’t bring it on this trip at all.

On medication, Japan restricts several products that are legal elsewhere, including some stimulant-containing cold and allergy medicines and certain prescription stimulants, some requiring an import certificate (Yakkan Shoumei). Thailand has its own strict narcotics and controlled-substance regime, including tight rules around certain prescription sedatives, stimulants (notably some ADHD medications), and codeine-containing products—Thailand’s list does not mirror Japan’s, and importing without proper documentation can result in serious legal consequences at Thai customs. Check both countries’ current restricted-substance lists for your specific medications, and carry prescriptions or doctor’s letters for anything borderline.

The rental-scooter question in Thailand

Scooter and motorbike rental is common and often informal in Thailand’s beach and island destinations, but it comes with real risk that doesn’t really have a Japan-leg equivalent: many standard travel insurance policies exclude or limit coverage for motorbike/scooter accidents, especially if you don’t hold a valid motorcycle license (an International Driving Permit with the motorcycle category, not just a car category) recognized in Thailand. Before renting a scooter on the Thailand leg of your trip, check your policy’s specific language on two-wheeled vehicles and license requirements—this is a common source of denied claims for travelers who assumed their general travel insurance would cover it.

Insurance, onward tickets, and emergency contacts for both legs

Confirm your travel insurance policy’s coverage explicitly names both Japan and Thailand, and separately check the scooter/motorbike exclusion above if that’s part of your Thailand plans. Both countries can ask visa-exempt arrivals for proof of onward or return travel, so keep that itinerary accessible for either leg.

Emergency numbers: in Japan, dial 110 for police and 119 for fire/ambulance. In Thailand, dial 191 for police, 1669 for the emergency medical/ambulance hotline, and 1155 for the Tourist Police (which has English-speaking staff and is often the more practical first call for visitors). Save all of these, plus your embassy’s contact details for Tokyo (or your Japan port of entry) and Bangkok, before you travel.

Official sources (checked on 2026-07-20)

If this actually happens to you (Travel AI Rescue)

A confiscated vape at Thai customs or a TDAC field you can’t figure out how to correct is exactly the kind of two-country snag Travel AI Rescue is built to walk you through.

Bundled with the Basic or Premium guarantee tier at eSIM checkout — 40% cheaper bundled (Basic $2.20, Premium $4.40; $3.70/$7.40 standalone). AI-drafted guidance, not a final medical/legal/immigration determination — contact local police, ambulance, or your embassy first in a real emergency.

• See Travel AI Rescue →
• Choose your eSIM plan →

Related pages

• Japan + Multi-Country hub — see the other four pair guides in this pilot set
• Visit Japan Web setup guide (single-country Japan article) — for a step-by-step walkthrough of the arrival QR code

Last updated: 2026-07-20 (first publication)