how to do kof 2001 iori's infinite?

[kengarou]

Man, i love playing 2001, it is so nostalgic, anyway how can i do this infinite combo of Iori? What is the method to do them? I can't figure it out after so many years.

Here is a link so you guys know what i am talking about.

kof 2001 iori infinity (real combo show)

[Running Wild]

Looks like he's just mashing to me lololol.