The New Zealand under-20 rugby team's success at the world champs has been tinged with sadness, following the death of winger Zac Guilford's father at the final.
Just after New Zealand beat England 44-28, it is understood Robert Guildford suffered a heart attack and could not be resuscitated at the Tokyo ground or at a local hospital.
Mr Guildford played 39 games for Wairarapa Bush between 1992 and 1996.
In recent years, Mr Guilford saw his son rise to prominence as a national age-grade player for Hawke's Bay and Super 14 team the Hurricanes.
Zac Guilford has also won back-to-back world titles with the New Zealand under-20 teams.