filejw
I guess I had no idea. Haven't done much dispatching in that part of the world. Just ran a few test flight plans and it seems that if you use RJAW/IWO airport (has a piece of concrete, so it is considered a suitable 60 minute airport per the definition but it is also a PPR military airport with no W/X or public approaches) as a 60 min airport you in fact don't enter ETOPS airspace.
However I seem to recall Fly Guam also flew GUM-HKG and that flight requires ETOPS 120.
Thanks!