We see them nearly everywhere, also in South East Asia, but why aren't any low cost airlines (read Air Asia, Jetblue, Easyjet and the likes, not Ryanair) flying between China, Hong Kong, Japan, Taiwan and South Korea? Are the distances between the various major airports of the mentioned countrys to far apart to create a route structure that is financialy viable (low cost companys tend to make as many turnarounds as possible, I think)? Are the airport charges to high, due to the lack of competing airports in one city? Any other possible reasons? Do you think we might see them in the future, and why (not)? Would it be possible to make it work with a widebody aircraft?
There's a huge potential in this region, roughly 2 billion people (of wich more than 1.5 billion chinese, who offcourse not all have acces to airtransport). A flight from ICN to NRT/ KIX/ HKG cost you atleast 350€, while it doesn't take more than 2 hours to reach NRT and KIX and 3,5 to reach HKG. TPE sets you atleast 250€ back and a flight to mainland China 400€ and up, while that's within 1,5 hours reach. But it's not a problem to fly for 250€ to BKK, 5 hours away.