US made KYBs are factory OE for NA built Honda; Showa is the OE supplier (with a small numbers of Jpn KYBs are for the rest of Jpn built Hondas) for Jpn hondas.
US made KYBs are unreliable, IMO, citing that 3 NA built Hondas (1 ody, 1 civic, 1 accord) all suffered from premature strut/shock failures during warranty period; and the rest of them would fail before 80~90k...
Most NA built Toys are OE'ed with Sach; some from other sources (not yet able to identify).
Q.
I had enough frustrations dealing with KYB in the past, from GR-2 to Excel-G, with mixed results. I no longer support/install them on my clientele's cars. I'd rather go with either Monroe OE spectrum or Tokicos.