The 2012 World Junior Speed Skating Championships was held in Obihiro, Japan, from 2–4 March 2012.
Russian skater Pavel Kulizhnikov originally won the gold medal in the 1000 meter race and the bronze medal in the 500 meter race, but was later disqualified from the tournament (along with the Russian boys team pursuit) and suspended for a doping violation.
References
2012 World Junior Speed Skating Championships Wikipedia(Text) CC BY-SA