Hmmm... Now that makes some sense. I'll give it a try.Try disengaging the clutch in neutral then blipping the throttle before shifting into 1st (let the "blip" completely return to idle before shifting). That breaks the clutch free and gives me a nice "snick" into 1st most of the time.
I have also noticed that if I am patient enough to pull in the clutch and just wait a really long time (like 60 seconds) it doesn't kerchunk as much. I assume that what is happening is that the secondary side of the clutch freewheels so easily in neutral that the small amount of normal drag in the disengaged clutch is able to keep it spinning for a while after the clutch lever is pulled in. I've listened to enough other FJRs to realize that they all do this to some extent.
Someone a while back suggested "pumping" the clutch lever in and out a few times before shifting into first. This never made any sense to me based on my concept of the cause and never worked to reduced my kerchunk either. Breaking the clutch halves free with a blip of throttle makes much more sense than that.