ID and check-in basics
Hotels in Japan are legally required to record identification for foreign guests, so expect to show your passport at check-in even if you already provided details when booking. Standard check-in generally runs from around 3pm, with checkout around 10-11am — arriving well before check-in time doesn't guarantee early room access, though most hotels will hold luggage at the front desk if you want to head straight out sightseeing.
Payment and deposits
Many business hotels take full or partial pre-payment at booking, or place a hold on a card at check-in, particularly for cheaper rate categories booked well in advance. This is standard practice rather than a red flag, but it's worth reading a listing's payment terms before booking if it matters to your budgeting.
Luggage forwarding between cities
For a multi-city Japan trip, takuhaibin (luggage forwarding) services let you send a suitcase ahead to your next hotel — typically arriving the following day — for a fee, meaning you travel that day's train with just a day bag instead of full luggage. Most hotel front desks can arrange this, and it's a genuinely popular option for travellers moving between Osaka, Kyoto, Tokyo and beyond.