Sorry to hear that you are struggling. JAL probably have to manage a decent amount of bookings, they have expanded their codeshare and collaboration with Qatar quite a bit. And sell 131 tickets with connections on both Narita flights, apart from their own flight, to numerous destinations.

Qatar Airways is not really famous for their clear coms and good support for irrops, so I could maybe imagine that JAL struggles with getting good info as well. Add to that the Japanese propensity to follow the rules to the dot and it can get messy.