Googling for Hori i found out this link:

http://www.tmpgenc.net/

It seems Hori is working or have worked with tMPEGnc Net and/or Pegasys Inc...

In the about page there is hori's email that is different to the one on the
delphix page, that is this: hori@tmpgenc.net

Also there's a link that goes straight to his delphi site so for sure we are
talking about the same guy

If you didn't do that already, WILL or some other admins can try to
contact him on the above address, maybe he will reply