"It was certainly no walk in the park for the Aussie who had about eight years on Keightley," father Ross Watson said.
"Prior to that he won the semi-final against the No2, another black belt and 30-year-old who weighed around 170kg, so was a big rig. That was a real confidence booster for Keightley next year."
Taki Tame Judo Club from Melbourne also invited Watson to be part of their teams event consisting of different weight categories of three females and four males.
The teams event saw the club placed second, so two silver medals for young Watson at the MIJO 2017.
There was also a 2-day training camp held after the competition which was a bonus under the guidance of Maria Pekli who is a two time Olympian and in addition he had 2x2-hour training sessions at Pekli's Melbourne Judo Club Resilience under her husband Daniel Kelly, a four-time Olympian who also had a successful MMA career after judo.
So, it will now be back into the gym six days a week to build more strength and work on some cardio which he will need when fighting the heavyweight seniors in 5-minute fights.
The 2018 season will start in January with the national training camp in the South Island then February in the ACT International open in Canberra, followed by Gold Coast in March before selection begins for the Oceania Judo Union event in New Caledonia in April.