So it would seem - but the service class I booked is still "Class J", which (as far as I can tell) is JAL's domestic business class product. It even allows me to select seats in the Class J section. So it's a bit funny it would be sold in the L bucket.

This thread seems full of people getting 40 TP for their Class J travel. I wonder if it's the advance purchase rate that keeps the TP down - or it could even be that since the booking is still unpaid, it's an economy booking that gets upgraded into I/J behind the scenes once it's paid?