7:43 AM PT -- Tenshin just responded to Conor ... and laid out his terms for a fight with the UFC star.
"Dear Mr. McGregor, Thank you very much for remembering my name. I’m honored that you would even consider fighting me," Tenshin said.
So, what kind of a fight does Tenshin want?
Weight -- 58 kg (128 lbs).
Fight Rules -- kickboxing rules.
Tenshin says these are the demands that "would probably get us in the ring sometime in the near future."
The problem ... Conor ain't 128 pounds. He weighed in at 155 lbs to fight Khabib back in October and hasn't fought at 145 since Dec.