Conor McGregor wants some of that action -- which is why he's calling out Tenshin Nasukawa ... the guy who got his ass kicked by Floyd Mayweather on New Year's Eve.
"I wish to go to Tokyo to face Tenshin Nasukawa in a Mixed Martial Arts exhibition bout," McGregor said in a note to the UFC and his agents at Paradigm Sports Management.
"Before this summer. Please arrange this, this instant. Yours sincerely, The champ champ."
The Tenshin vs. Floyd fight was supposed to be a 3 round exhibition -- but Tenshin's corner threw in the towel with 41 seconds left in the 1ST ROUND after Floyd knocked him down multiple times.