Tottenham Hotspur boss Mauricio Pochettino has admitted that Manchester City and Manchester United are now on a different level to his side, as he saluted their third place finish in the Premier League.
It was Kane's England teammate, Jamie Vardy, who first got on the scoresheet.
Spurs booked a third successive year in Europe's elite club competition, in a season where they played "home games" at Wembley and all the other teams around them spent massively.
The Argentine coach has achieved three consecutive top three finishes for Spurs, and Champions League football in their new stadium but his mind was already racing on to the challenge of doing it again next season.
Spurs were caught cold in just the fourth minute when Vardy was allowed a free run to glance a header from Mahrez's teasing left-wing free-kick into the far corner.
Kelechi Iheanacho's stunner put Leicester two clear just after halftime but it provoked a furious Spurs response in which Erik Lamela struck twice either side of an own goal by Christian Fuchs who deflected Lamela's shot in off his knee. Lucas Moura won the ball high up the pitch and released Kane, who raced in on goal and shot past Eldin Jakupovic at the near post.
The sides went in level at the break and Leicester came out with their tales up and, two minutes into the second half, made it 3-1 when Iheanacho picked the ball up centrally, drove to the edge of the box and fired the ball into the top right corner past a helpless Lloris. We can not invest insane money.
"Of course, I want to retain the boot but consistency is the most important thing for me, getting 25-plus goals in the Premier League season after season".
Lamela scored another to make it 4-3 as Spurs scored three times in the space of 11 minutes to turn the game on its head.
Kane, though, had the final say and bowed out on 30 league goals and it was a beauty, as he left Hamza Choudhury for dead and curled the ball into the far corner to end the match and Tottenham's Wembley stay in fine fashion.