Originally Posted by
kesler.go
I believe they are all considered short...those would be flights where movie was not offered (prior to the recent changes on CX Studio). Although I may be wrong.
I think you're right

These 3 routes served what I called a 'lighter' meal. If one notices, they serve everything on one tray at one go (smaller starter plate usually consists of cut fruits or a rather unappetizing starter and the same-sized desserts plate with like chocolate mousse or just Haagan-Dazs ice cream).
Other longer regional routes (SIN, KUL, DPS) serve the full-on meal; crew come collect your starter plate once you finish before presenting you the main. And they would collect your main before the fruits/desserts trolley being rolled out at your seat.
Re: nuts - not sure why the inconsistency. For every J flight I took except HKG-TPE sector, I have been offered proactively.