You do not need to build your entire life on your first day in Japan. What matters is that you can get through the door, reach the right person and know where you need to be the next morning.
Keep the essentials with you
Carry your passport, immigration documents, move-in address, contact details and contract confirmation in your hand luggage. Save offline copies on your phone in case you do not have data when you land.
Confirm how you receive the key
Check the date, time, place and who to contact if you are delayed. For self check-in, save screenshots of the entrance instructions before you travel.
Prepare only what the first night needs
Find out whether bedding is included, how the hot water and climate control work, and where you can buy food nearby. Keep a charger, adaptor, towel, essential medicine and a change of clothes together.
Leave room for the next day
Address registration, phone and banking tasks often follow soon after arrival. Avoid packing the first evening with appointments; use it to understand the route and the area around your new home.
A clear checklist turns an unfamiliar move into a few manageable actions. Settle in first, then build your life in Japan at a comfortable pace.