it certainly does share some details with that and with some 3Rensho, too...but don't know if it's either since the frame bits I see could be either or none. It's certainly a high-end Japanese frame, the BB shell is investment-cast Hitachi (same company as makes the electronics).
How about some details of the forkcrown? (which does not seem to have the 3Rensho offset, AFAI can tell)


edit: Sorry, didn't realize the fork was not OEM, need to read more carefully.