However, based on the information available up to September 2021, here are some general points about Japan Airlines’ seat selection process: During Booking: When booking a flight with Japan seat selection, you can usually select your seats during the booking process. The seat selection option is typically available on their official website, reservation centre, or through travel agencies. Manage Booking: If you have already made a reservation but didn’t select seats during the initial booking, you can log in to your Japan Airlines account on their website or app and access the “Manage Booking” section. From there, you should be able to choose your seats before your flight.