If going there as fast as possible, yes, but actual flight times for SIN-KIX and KIX-GUM are only 6:00 and 3:25 respectively. I like Osaka (speaking and eating Japanese helps...) so I'd be happy to spend a night in a 1600-yen capsule hotel.
Are there any other 'bang for your mile' trips on SAS? I believe the classic option for Europe is to head out to Longyearbyean (LYR) on the Svalbard Islands, the northernmost scheduled airport in the world way past the Arctic Circle, which is just 12000 points starting anywhere in Scandinavia -- although the trip usually involves connecting in both Oslo and Bergen and would normally cost you upwards of 1000 euros even in Y!
Not that Svalbard quite matches Guam if it's palm trees and girls in hula-hula skirts you're looking for... a friend of mine went there on his EB points and spent the week drinking (tax-free) vodka in an aluminum hut with Russian miners and keeping a wary eye out for polar bears.