Japan is still in start-up, but improving, and Vietnam is still in early start-up.
"Early start-up" must be the latest management-speak for "embarrassing debacle". It can't be anything to do with timeframes, since the outfit in question has been known as "Jetstar Pacific" for 7 years now.
You conspicuously failed to mention Jetstar Hong Kong. Presumably it's in "embryonic start-up".