Nishikata had his first World Cup appearance in 1988 at the Four Hills Tournament . But he could not qualify for the main competition of the best 50 jumpers in all four competitions. He then had to wait 5 years for his next appearance in the World Cup. It was not until the 1992/93 season that he was back on the Japanese World Cup team. He was able to place himself in the top ten at the jumping in Falun and Ruhpolding at the start of the season, but did not confirm this performance during the season. However, he succeeded in this in the following season. At the World Cup in Courchevel , Nishikata took second place behind Andreas Goldberger . In his home town of Sapporo , he was able to fight for another podium with third place. Overall, he was able to place eight times in the top ten during the season and finished eighth in the overall World Cup. At the 1994 Winter Olympics in Lillehammer , he won silver with the Japanese team behind the German team. In the individual competitions, he took eighth place.
In the following years he could no longer confirm these achievements and was only rarely used in the World Cup. On January 28, 2001, he played his last competition at the World Cup in Sapporo.