However , it is in Japan 's premier sportscar series that he has carved his career over successive seasons .
Wirdheim started out in Formula Nippon , but by year two of his Far Eastern adventure , he was also racing in Super GT .
It is in Japan 's premier sportscar series that he has carved his career over successive seasons .
Wirdheim started out in Formula Nippon , but by year two of his Far Eastern adventure , he was also racing in Super GT .