"He wants to get the black belt by 'Batsugan' - which is winning six fights in a row against judokas of equal or higher grade with no break between fights - not by Kata which is demonstrating your skill in slow motion with another judoka."
Younger brother Callaghan Watson, 12, missed out on a medal in Senior Boys over 66kg (11-14 years) but went on to get the silver in the Senior Boys Open Weight.
Callaghan Watson hopes to improve his form at the New Zealand championships in two weeks time.
Older sibling Keightley had a quick turnaround as the family flew back into Palmerston North, and then last night he departed from Wellington to fly to Canberra where he will train for a week at the Australian Institute of Sport with the Australian Junior men's team.
"This opportunity comes courtesy of the Judo Federation of Australia, who approached us last week to see if Keightley would be part of their team build up for the junior worlds - 18-20 years of age - being held in Croatia in October," said Ross Watson.
"I suppose this has come on the back of Keightley's recent success at the Sydney International, where he defeated their three heavyweight fighters selected for the worlds quite convincingly, so they want a big heavyweight to help prepare them."
The camp will be an organised week of 'Randori' (fighting) and technical work in a mini competition.
There will also be individual focus meetings, hydrotherapy sessions and class work.
Keightley will be back in time to join Callaghan to compete at the New Zealand Judo Championships in Wellington on September 27.
The brothers last competition for 2017 will be at the Melbourne International Open in October, which includes a two-day training camp afterwards.