He also helped the Netherlands win a silver medal at the FINA World Championships in Fukuoka, Japan in 2001 as a member of the 4×100 meter freestyle relay team.

His coach, Fedor Hes, helped him develop a different training strategy which involved spending more time on dry land.

Seemingly invigorated by the new training style, Johan quickly progressed enough to win fourth place at the 50 meter freestyle event in the World Championships in Barcelona, Spain.

[1] As the starting swimmer in the 4×100 meter freestyle relay, alongside Pieter van den Hoogenband, Mitja Zastrow, and Klaas-Erik Zwering he played a critical role in securing a silver medal in the event.

Kenkhuis is currently living in Amsterdam where he is a member of De Dolfijn SPAX swim club but trains with XLence Swimteam.