First of all I would never trust anyone that advertises H23A1 as JDM. That is ridiculous.

stay the hell away!
as far as the H23A3 goes:
H23A3 was put in the European version of normal Accord from 1993 to 1995. The car was described as 2.3iSR.
This is basically the same engine as H23A1 (US Prelude) and H23A2 (European Prelude).
H23A3 was also found in the European 1992-1996 Rover 623 SLi, GSi, and iS.