Carry-On Only for Japan: Beat Weight Limits and Pack Smart

Japan is one of the best countries in the world for carry-on only travel. Toiletries are cheap and everywhere, coin laundries operate on almost every residential street, train stations store your luggage for the day, and the domestic airline network connects every major city quickly. The main variable is which airline you fly — and the weight gap between full-service and budget carriers in Japan is significant.

ANA and JAL vs Peach and Jetstar Japan

ANA and JAL allow 10 kg in the cabin, which is generous by any standard. If your entire Japan trip uses these two carriers — including domestic hops between Tokyo, Osaka, Kyoto, Sapporo, or Fukuoka — you can pack a comfortable 7–8 kg bag with room to spare.

The moment you add a Peach Aviation or Jetstar Japan domestic leg, the limit drops to 7 kg. Both enforce this. Peach in particular has a reputation for weighing bags at check-in at Kansai International and New Chitose airports. Budget your bag to 6.5 kg packed so you have buffer for a small souvenir or a last-minute convenience store purchase.

Clothing Strategy for Japan's Four Seasons

Japan has genuinely distinct seasons. If you're visiting in summer (June through September), Tokyo humidity makes synthetics feel uncomfortable — lightweight linen and moisture-wicking fabrics work better. Winter (December through February) in northern Japan requires insulating layers and a proper mid-layer, which is heavy. The carry-on challenge for winter travel is fitting a down jacket — choose a packable down that compresses to the size of a water bottle.

Core packing list for most Japan trips:

• 4–5 lightweight tops or shirts
• 2 pairs of versatile trousers (dark, smart enough for restaurants)
• Comfortable walking shoes (you will average 18,000–22,000 steps per day in Japanese cities — choose footwear carefully)
• 1 packable rain layer
• Temple-appropriate clothing — loose trousers or a light scarf to cover shoulders when required

Toiletries: Buy Everything in Japan

This is non-negotiable advice: do not fill your liquids bag before flying to Japan. The 100 yen shops are extraordinary. Daiso sells travel-sized containers, cotton pads, face wash, shampoo, conditioner, and dozens of beauty and hygiene products for 110 yen each. Drug chains like Matsumoto Kiyoshi and Sugi Pharmacy sell full-size products at prices lower than most European supermarkets.

Bring one 100 ml container of any item you genuinely can't replace (a specialist skincare product, for example), then buy everything else after landing. This alone saves 400–600 g and removes the entire liquids-bag problem at security.

The Suica IC Card

Pick up a Suica card at any JR East station kiosk on arrival at Narita or Haneda. The card loads into Apple Wallet or Google Pay and works across trains, buses, and convenience stores throughout Japan. You do not need a physical card if your phone supports mobile Suica. Keep it in an accessible pocket rather than buried in your bag.

JR Pass: Physical vs Digital

The JR Pass is now available in both physical and digital formats. The digital pass loads to your smartphone and is shown at staffed ticket gates — you cannot use digital passes at automatic IC card gates, which can cause confusion at peak times. The physical pass requires exchange at a JR office on arrival but works everywhere without phone battery anxiety. For a busy itinerary, the physical version is lower friction.

Coin Laundry: Your Secret Weapon

Japan has coin laundries (コインランドリー) in almost every residential neighbourhood and near most guesthouses. A wash-and-dry cycle costs around 500–800 yen and takes 60–70 minutes. This means you can pack for 5–6 days and do laundry once mid-trip without any issue. Many budget hotels and hostels have in-room machines or facilities on-site. Halving your clothing load is entirely practical.

Coin Lockers for Day Storage

Japan's coin locker network is one of the best in the world. Major stations — Shinjuku, Shibuya, Kyoto, Osaka — have hundreds of lockers in several sizes. Leave your main carry-on at a locker when you want to explore a day trip to Nikko, Nara, or Hiroshima without dragging luggage, then collect it before your evening train. Most lockers accept Suica card payment and can be booked for multiple days. Check the station's locker map on arrival — they are usually near the main exits.

Japan's Biosecurity on Return

Japan enforces strict controls on what you bring into the country (certain meats, plants, and fresh produce). When you leave Japan and return home — particularly to Australia, New Zealand, or the USA — your destination's biosecurity rules apply. Declare all food products, wooden items, and plant material. Sealed, commercially packaged Japanese snacks are generally fine, but matcha-flavoured fresh sweets with plant ingredients may be flagged. Declare anything you're uncertain about rather than risk a fine.