The 23-year-old right-back made 34 appearances for the Dutch club before an ACL injury cut short his temporary stint at the Goffertstadion.
However, Blues coaches were constantly in touch with their NEC counterparts regarding Kane who believes he did his chances of eventually breaking into Antonio Conte's first-team at Stamford Bridge no harm at all.
“I went to Holland, into a different league, as I'd always wanted to play abroad. The team plays great football and I was able to express myself.
“My game is about going forwards but was able to work on my defensive role. I got made vice-captain because I was a leader in the team. It was an honour.
“Chelsea watched every game. I was in contact with Eddie Newton and Paolo Ferraira (who oversee loans), and they would often come over. They were very pleased."