Does anyone know what JAL does with their aircraft between the time they are delivered and the time they are deployed. Looking at the most recent plane JA06WJ, it hasn’t had any flight activity since the 3rd and won’t start LHR until 24th. I assumed they might run it on domestic or short-haul flights first to get the crew familiar but it seems it hasn’t moved.

Assuming the seating was installed in TLS, what does JAL do with the aircraft for 3 week?