From 30 Days Out to D-1 (The Big Picture)
When two families travel together, there's twice as much to take care of. Set dates and cross items off one by one, and you'll feel at ease. Paste the timeline below straight into your group chat.
Three things matter most. Tackle the big items in the order passports & documents → insurance → packing, and the rest will naturally fall into place. Make it a habit to double-check details like fares, opening hours, and event schedules on official sites one more time right before you leave.
💡 Divide the Roles
Assigning a 'documents person' and a 'packing person' per family cuts down on things slipping through the cracks. For digital tasks like insurance and VJW, it's less error-prone to have one person handle everything for the 4 adults + 2 babies in one go.
Essential Documents Checklist
Save everything on your phone (screenshots/PDFs) and also carry one paper copy. If your phone dies out in the cold, the paper copy becomes your insurance.
- Passports: For everyone (including both babies). At least 6 months of validity recommended; check for remaining pages
- Visit Japan Web QR: The QR for immigration and customs declaration (it may appear combined or split depending on the timing). Register the family together, then have each person screenshot their QR
- Flight e-tickets / seat info: Fares are based on the child's age as of the departure date. Children under 2 (e.g., 16 months) typically travel on an infant fare on a guardian's lap, while children 2 and over (e.g., 33 months) typically travel on a child fare with their own seat — confirm the exact application with the airline using the date of birth
- Accommodation vouchers / booking confirmations: All reservation numbers for hotels, ryokan, and the rental car
- Travel insurance policy (PDF): Note the policy number and the overseas claims contact separately
- International Driving Permit + Korean driver's license: Carry both if renting a car (Japan requires a Geneva Convention international permit, and you must also have the original Korean license)
- Emergency contacts: Korean Consulate-General in Sapporo, the Consular Call Center, Japan's emergency numbers (119/110), the insurer's claims line, card-loss reporting numbers, and your accommodation's phone numbers
- Payment methods: A travel debit/overseas-payment card + a small amount of emergency yen cash. Carry two types of cards, kept in separate places
ℹ️ Registering the Family on Visit Japan Web
One representative can register up to 10 accompanying family members, and each member gets their own QR code (per the official operating manual). Babies under 2 must also be registered with their passport details, so don't leave out the 16-month-old. At immigration, each person presents their own QR, so it's handy to save the children's QR codes on the adults' phones in advance.
⚠️ A Note on the Future Date
As of December 2026, immigration and customs procedures, how the kiosks operate, and the QR layout (combined/split) may all have changed. Double-check the official Visit Japan Web guidance right before you leave.
Combined Winter + Baby Packing Checklist
December in Sapporo is the dead of winter. Based on official climate normals, daytime highs hover around 0°C and overnight lows around -7°C, getting colder as the month goes on (with frequent wind and snow, it feels even colder). For adults the principle is 'thin layers, lots of them'; for babies it's 'easy to take off and put back on.' Indoors (underground malls, restaurants) the heating is strong, so you'll be opening and closing your outerwear often.
Cold-weather clothing (everyone) - Thermal underwear (Heattech-style), top and bottom - Mid-layer: fleece-lined sweatshirt/fleece/knit - Outer layer: a waterproof long padded coat or a heavy overcoat - Bottoms: fleece-lined pants or ski pants (jeans get wet in the snow and aren't recommended) - Anti-slip winter boots, plus spare thick socks - Hat, gloves, neck warmer/mask - Plenty of stick-on hand warmers (also available at local convenience stores and drugstores)
Baby gear - Diapers and wet wipes (available locally, but bring the first 1-2 days' worth) - A baby snowsuit/padded suit, foot covers, a warm hat and mittens - A weatherproof stroller cover/blanket (or a baby carrier — a carrier is safer on snowy paths) - Formula, baby food, snacks, a thermos, portable dishes/bibs - Spare changes of clothes (they get wet in the snow easily), plastic bags (for wet clothes) - The usual sleep items (a comfort toy, a night light) — to help them settle in an unfamiliar bed
Medications (separate ones for the kids) - Baby fever/pain reliever (the one you usually use), a thermometer - Cold/runny-nose medicine, anti-diarrheal/digestive aids, ointment (for cuts and diaper rash) - Adult meds: fever/pain reliever, digestive aids, motion-sickness medicine, bandages, moisturizer/lip balm (it gets very dry) - ※ Watch out for ingredients banned in Japan (see the warning below)
Electronics - Plug adapter (Japanese Type-A) + 1-2 Korean-style power strips - Power bank (to guard against cold-weather drain; must be in your carry-on — not allowed in checked bags) - Several charging cables, an eSIM/SIM card, a camera
Other - Moisturizing cream, lip balm, hand cream (the indoor-outdoor temperature swing causes extreme dryness) - Anti-slip shoe grips (crampons) — also available at local convenience stores - Compression bags (to pack down bulky padded coats and diapers), a foldable shopping bag, a small umbrella
⚠️ Watch Out for Drug Ingredients Banned in Japan
Japan strictly regulates certain medication ingredients (per the Ministry of Health, Labour and Welfare). Products containing pseudoephedrine (in some runny-nose and combination cold medicines) or codeine are banned from entry — check the ingredient list before you pack them. Acetaminophen- and ibuprofen-based fever/pain relievers are fine. For personal use, you're generally allowed up to a 2-month supply of over-the-counter drugs and a 1-month supply of prescription drugs; if you exceed that, or for items like injectables, you must obtain a 'Yakkan Shoumei (薬監証明)' in advance (the application takes several weeks). Check both the babies' and the adults' medications ahead of time.
💡 How to Cut Down on Luggage
Pressing bulky padded coats and diapers into compression bags frees up a lot of suitcase space. Diapers, wet wipes, and snacks can be restocked locally at New Chitose Airport or downtown drugstores, so you can pack just a 'starter' amount.
Travel Insurance — The Crux of a Winter Trip with Babies
Medical care in Japan is expensive. Foreigners aren't covered by Japanese health insurance, so a single ER visit or hospital stay can run a large sum (in the tens of thousands of yen). With two babies and dead-of-winter ice underfoot, insurance isn't optional — it's essential.
What you should be covered for - Overseas medical expenses (illness/injury): The most important. A sufficient limit per person is recommended (for reference, many expert guides suggest USD 100,000+, with USD 250,000+ for emergency evacuation — compare products yourself) - Personal belongings damage: Theft or damage to cameras, laptops, strollers, etc. - Flight delays / baggage delays: Winter snowstorms cause frequent cancellations and delays - Personal liability: For when a child damages someone else's property or a facility - Also check whether emergency medical evacuation and death/permanent disability are included
Enrolling infants and toddlers - The 16-month-old and 33-month-old can be enrolled too, but eligible ages and coverage limits vary by insurer. Enrolling everyone as a family at once makes it easier to manage. - Save the claims contact from the policy you receive after enrolling.
When to enroll - Recommended at least one week before departure. Comparing and enrolling takes time, and coverage starts the moment you enroll. - You can also enroll at the airport or online on the day of departure, but Korean insurers do not allow sign-up after departure (boarding) (only some products allow limited sign-up right after departure). Online is generally cheaper. - Premiums for a short family trip are typically in the range of a few thousand to around 10,000 KRW per person (varies by product and coverage).
⚠️ Don't Rely on a Card's Free Insurance Alone
The complimentary overseas travel insurance attached to credit cards has low medical limits (usually around USD 10,000-100,000), and often has a short coverage period or excludes accompanying family members (especially babies). Treat it as a 'supplement' only, and it's safer to take out a separate policy with adequate medical coverage. Be sure to check your card's terms and conditions.
💡 Preparing for Medical Claims
If you visit a hospital locally, be sure to keep the medical certificate and the receipts (with itemized details). You'll need them to file a claim after you get home. It's also a good idea to photograph your payment receipts and prescriptions.
Electricity & Connectivity (Outlets / eSIM / Battery)
Voltage & outlets - Japan uses 100V (110V devices work too), and the plug is Type-A (two flat pins). - Chargers for phones, laptops, and cameras are mostly free-voltage (100-240V), so you just need a plug adapter. - Korean 220V-only products (curling irons, some appliances) risk breaking if used as-is — you'll need a transformer, or bring a local/dual-voltage version. - Hotels are short on outlets. Bringing 1-2 plug adapters + a Korean-style power strip lets you charge several devices at once from a single adapter.
Internet (for a family of four) - eSIM: The most convenient. Activate instantly by scanning a QR code, and since you don't remove your existing Korean SIM, you still receive texts and calls on your Korean number (on dual-SIM devices). Pricing varies by timing and data allowance, but a few days at roughly 1-2GB/day runs around 5,000-8,000 KRW. (Note: older phones don't support eSIM — check device compatibility.) - Physical SIM: Slightly pricier than eSIM, can't receive your Korean number, and requires physical delivery. - Pocket Wi-Fi: One device can be shared among several people (handy for a family with babies). But once you add charging, carrying it around, delivery fees, and loss insurance, the cost goes up. Roughly 3,000-5,000 KRW per day. - Roaming: The simplest but expensive. Worth considering if you don't use much data. - Recommendation: an eSIM each for the adults, or one shared family Pocket Wi-Fi + one backup eSIM.
Power banks - Batteries drain fast in the cold. One per person is recommended, fully charged before departure. - Must be carried on board (not allowed in checked baggage). As a rule, you can freely carry capacities up to 100Wh (about 27,000mAh); 100-160Wh requires airline approval and is limited in quantity. - Starting in 2026, Korean flag carriers and others have tightened rules to prohibit charging power banks or connecting them to in-seat power during the flight and require them to be kept within reach (not in the overhead bins) — check your airline's latest rules before boarding.
ℹ️ Connectivity & Battery Rules Change
eSIM and Pocket Wi-Fi prices change frequently with promotions and timing (compare and book 1-2 weeks before departure). In-flight power bank rules also differ by airline and over time, so check the official notices before you leave.
Loss & Emergency Preparedness
In winter your hands are clumsy and you're carrying a lot, so the risk of losing things or losing track of a child goes up. Set things up in advance so that 'even if you lose it, you can recover.'
- Photo backups: Photograph your passports, flight tickets, insurance policies, and booking confirmations and save them to the cloud. Spread them across the phones of at least 2 adults
- In case of passport loss: Keep a passport copy + one passport photo separately (for reissuance)
- Note down the card-loss reporting numbers, and split the payment cards among the family
- In case a child gets lost: Put a card/name tag with 'parents' names + contact info' in the inner pocket of the child's clothes. The active 33-month-old will often let go of your hand in a crowd
- Save emergency contacts: Korean Consulate-General in Sapporo (+81-11-218-0288), Ministry of Foreign Affairs Consular Call Center (+82-2-3210-0404), Japan's emergency numbers 119 (ambulance/fire)/110 (police), insurance claims line, accommodation phone
- Spread out your cash: In case cards don't work or a shop only takes cash, distribute small amounts of emergency yen among the adults
ℹ️ Japan's Local Emergency Numbers
When someone is sick or injured, the ambulance/fire number is 119; for incidents, theft, traffic accidents and other police matters it's 110 (free even from pay phones). For 119 you have to state first whether it's a fire or a medical emergency, and if a foreign language is difficult, you can also get Japanese-interpretation help from the Consular Call Center. For maritime accidents, it's 118.
ℹ️ Consular Call Center & Korean Consulate-General in Sapporo
For emergencies abroad such as incidents, accidents, or a lost passport, call the Ministry of Foreign Affairs Consular Call Center (from overseas: +82-2-3210-0404, 24/7, year-round). Installing the 'Consular Safety Call Center' app lets you call for free over Wi-Fi. In Sapporo there's the Korean Consulate-General in Sapporo (main line +81-11-218-0288, after-hours/emergency +81-80-1971-0288). Double-check the numbers and office hours on the official website before you leave.
At a Glance
Timeline
Useful Words
Key Points
- Check that passports are valid for at least 6 months — don't forget the two babies' passports either
- On Visit Japan Web, one representative can register the whole family (up to 10 people) at once, and each gets their own QR code (the process may change over time)
- As a rule, take out travel insurance before departure (Korean insurers don't allow sign-up after you've left the country), with ample medical coverage for everyone, babies included
- A card's free insurance has low medical limits, so treat it as 'supplementary' — get your main insurance separately
- The winter + baby formula: 3-layer clothing + anti-slip boots + stick-on hand warmers
- Always check the ingredients in your medications — Japan bans bringing in drugs containing pseudoephedrine or codeine
- An eSIM is the most convenient option (keeps your Korean number); to guard against cold-weather battery drain, a power bank is a must in your carry-on
- Japan's emergency numbers: ambulance/fire 119, police 110 (free from pay phones)
- Japan uses 100V Type-A outlets → bring a plug adapter + a Korean-style power strip
Good to Know
⚠ Confirm before you go
- Hero image: the draft's 'Sapporo TV Tower in winter.jpg' does not exist on Commons (404), so it was replaced with the actually existing 'Winter Night- Sapporo TV Tower.JPG' (CC BY-SA 4.0)
- Visit Japan Web's immigration and customs procedures, QR layout (combined/split), shared kiosk operation, and scope of application at New Chitose Airport may change by December 2026 — re-check the official site right before departure
- Eligible ages, coverage limits, premiums, and terms for enrolling infants/toddlers in travel insurance vary by insurer and over time — confirm directly when enrolling. 'No sign-up after departure' is the general rule for Korean insurers, and some products have limited exceptions
- The coverage and limits of credit cards' complimentary overseas travel insurance differ by card/tier — check the card's terms and conditions
- eSIM, Pocket Wi-Fi, and roaming rates fluctuate with promotions and timing (prices in the text are rough figures based on 2025-2026 research)
- Each airline's rules for infant (under 2) and child (ages 2-12) fares, seats, and lap-seating differ by airline and route, and fares are based on the child's age as of the departure date — confirm with the date of birth when booking. The 16/33-month ages assume a Dec 2026 departure
- In-flight power bank rules (charging prohibition, capacity, quantity limits) may be tightened or changed by airline and over time — check the relevant airline's latest notice before boarding
- Japan's medication import limits (2 months of OTC drugs, 1 month of prescription drugs), banned ingredients, and the Yakkan Shoumei process may change under Ministry of Health, Labour and Welfare policy — confirm officially before departure
- Japan's duty-free allowance on entry (3 bottles of alcohol, 200 cigarettes, 200,000 yen of general goods) is subject to change under Japan Customs rules
- The Korean Consulate-General in Sapporo's phone numbers and office hours may change — re-check the official website
- The exact dates, hours, and fees of Dec 2026 events like the Sapporo White Illumination and Christmas Market are not yet confirmed — use the annual pattern as a reference (the Odori venue typically runs from late November to Dec 25, with some venues running longer) but confirm once the official schedule is set
- The exchange rate (100 yen ≈ 920 KRW) fluctuates, and the KRW-converted amounts are for reference only
Sources (12)
- Ministry of Foreign Affairs guide to travel insurance / Consular Safety Call Center
- Visit Japan Web official (Digital Agency)
- Visit Japan Web operating manual (Korean)
- Korean Consulate-General in Sapporo (contact info)
- Japan emergency numbers (how to call an ambulance via 119, in Korean)
- Guide to bringing medicines into Japan (banned ingredients, Yakkan Shoumei)
- Guide to Japan's duty-free allowance on entry (Korean Consulate-General in Sapporo)
- Japan voltage & plug guide (Japan Guide)
- Rules on using/charging power banks in-flight (Korean Air notice, Jan 2026)
- Korean Air traveling with children (infant/child fares and seats)
- Sapporo December climate normals (Weather Spark)
- KKday Japan SIM/eSIM/Pocket Wi-Fi recommendations