Pochettino's comments come after Crystal Palace manager Neil Warnock suggested he could've signed the forward on loan if Spurs were not in the Europa League.
Pochettino was asked about Kane at a news conference after Crystal Palace manager Neil Warnock claimed he tried to sign the spurs forward in the summer, implying he would have got his man if Tottenham weren't participating in the Europa League - which Warnock branded a 'horrible cup on a Thursday night'.
The Spurs boss told reporters: "This is the first time I've heard this information. My idea was to keep Harry Kane because we believe in him and because of his potential. He showed that we are right to keep him."
Kane has found the net more regularly than any other striker so far this season and is into double figures in all competitions. He looks set to start this weekend's game against Palace at White Hart Lane, probably alongside Roberto Soldado, with Emmanuel Adebayor ruled out through injury.
"After the international break he came back with a problem in his hamstring and his back, and afterwards he got a virus. Today he is not ready to play."
The Spurs boss also added that Adebayor said he still felt 'weak' in today's training session but could be available in the coming games.
Pochettino wouldn't be drawn on media speculation surrounding Adebayor's future but says he has a very good relationship with the forward, indicating he is not keen to offload him in the January transfer window.