Hello everyone,
I am currently on a trip around the world and enjoyed Tokyo. That much that while on my trip RTW I am already planning a trip around Christmas/New Years

. I'm flying my RTW in business and really enjoy flying - I love every moment of it and will miss that much flying for a while. 'Normal' people tell me I'm crazy for flying SIN-KUL-SIN-SYD-LAX (thanks, FT!) instead of SIN-LAX, to give you an idea

.
So here's the deal. Apart from enjoying flying in business class, the miles associated with it are appealing too, obviously. So, I'm looking for the lowest fare from AMS to NRT departing late December, returning January 1/2/3. A stopover in either SIN or HKG would be great - but for some reason I can't seem to price out tickets <$3500 with such a stopover. VS currently has a ticket for $3000 return, but no stopovers allowed other than LHR.
Any help with this? How should I start my search?
Thanks ^!