Hi,

Apologies if this is a n00b question - I did a quick search but couldn't seem to find anything related.

I'm looking to fly SIN-NRT/HND in early April. If I leave SIN anytime up to 31st Mar, a range of fares in Y and J are available. If I leave from 1st April onwards only full? Y and J are available (about $3000 for Y and $6000 for J).

When does JAL make the rest of the fare classes available (ExpertFlyer is showing plenty of availability - I just can't seem to book it via the JAL website ex-SIN)

Thanks in advance.