Apart German Dziebel and his “out of America” (that I consider like every theory that isn’t wrong before it is definitely demonstrated, and that some American R1b can be ancient and not due to recent European admixture I spoke about citing the papers of Bortolini), also Argiedude has raised the problem of R1b in East Asia.
I examined an haplotype of a Japanese from Okinawa but transplanted to the Hawaii (Ysearch: CZ42V). What must we think? It is clearly an R1b1b2a (L23+), but the closest to it is a Mexican, probably of Spanish (perhaps Jewish) descent (Ysearch: JAKUP).
We know that Spanish haplotypes from Mexico were diffused to the Pacific islands (see Philippines and probably many others Pacific harbours).
Anyway an ancient diffusion to East Asia from Central Asia of early R1b haplotypes is likely: while some came to West others went to East, but the times are of course very ancient.