Kane started the season as Tottenham's third-choice striker - but by the end of May he was known as one of the most feared young forwards in Europe.
The 21-year-old was named PFA Young Player of the Year after finding the net 32 times.
The most memorable goal in his collection came on March 27 when, just 79 seconds into his England debut at Wembley, he headed home Raheem Sterling's cross to round off a 4-0 victory over Lithuania.
It was the perfect way to cap a fairytale season, but Townsend believes there are plenty more chapters to be written in the Harry Kane story.
Townsend, who was speaking on behalf of England team sponsor Vauxhall, thinks Kane can not only equal but better his tally next season.
"He's had a fantastic season and hopefully next season he can take it to the next level and help us really achieve something," the Tottenham winger told Press Association Sport.
"He had two or three players marking him in the second half of the season and he has still scored another 10 or 11 goals.
"He has the ability to do even better next season.
"It was no surprise when he scored 79 seconds into his debut
He has turned into an animal and that will benefit Spurs and England."
Townsend has watched Kane's progression from shy youngster to predatory scorer at close quarters.
They both played for famed youth team Ridgeway Rovers before joining Tottenham's academy, and attended schools in Chingford just two miles apart.
Townsend's first memory of playing alongside Kane came six years ago during the Chivas Cup in Mexico.
Despite competing against players who were two years older than him, a 16-year-old Kane found the net three times.
"He came on as sub in three matches, played 60 minutes and scored three goals," Townsend recalls.
"It sums him up - if you give him a chance, he will score."
A tight-knit group which also contained Steven Caulker and current England international Ryan Mason finished third.
Two years later the same group came to the public's attention when they performed their own version of Ben E King's 'Stand By Me' in a cramped dressing room at Spurs' old training ground in Chigwell.
Townsend took the lead vocal while a young and shy Kane sat curled up in the corner wearing a woolly hat
The video, which went viral after being published on YouTube, summed up the team spirit among the group that played a big part in their progression from young hopefuls to England stars.
"There were a lot of shy players in there like Ryan Mason, Tom Carroll and Harry Kane who have now come out of their shells and have grown into men," Townsend said.
Kane and Townsend will spend time together at St George's Park this week before parting ways for the summer.
Kane will head to the European Under-21 Championship and Townsend will fly to the Republic of Ireland and Slovenia for the seniors' final two games of what has so far been an unbeaten season.
After missing the World Cup due to an ankle injury, Townsend has had a "stop-start" season that saw him start just one league game before Christmas.
The winger featured more prominently after the turn of the year, though, and scored a stunning equaliser for Roy Hodgson's team in Italy two months ago.
Townsend followed up the goal by tweeting a sharp riposte to Paul Merson, who had suggested the midfielder should not be in Hodgson's squad.
The Spurs man will use that criticism to drive him to succeed for the rest of his career and he is hoping to repay the continued faith show in him by Hodgson over the next two weeks.
"There was a lot of criticism before the Italy game but I used it in a positive way," he said
"It's always good to answer your critics on the pitch."
On his barb at Merson, Townsend said: "It was just a bit of banter on social media
It's fine, there are no problems."
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Source : PA
Source: PA