Meynaf has ported the Atari ST version of International Karate over to the Amiga. In case you don’t know who Meynaf is, he is responsible for also porting over Gauntlet, Joust and Super Sprint to the Amiga last year. You can download his latest port on his website.
There’s also a thread on English Amiga Board with more information.
Source: http://meynaf.free.fr