is a Japanese professional baseball pitcher for the Orix Buffaloes of Nippon Professional Baseball (NPB).
On October 26, 2020, Yamashita was selected by the Orix Buffaloes as their 1st pick of the 2020 NPB draft.
On March 30, 2023, Yamashita was selected as the starter for Opening Day, due to the fact that Yoshinobu Yamamoto and Hiroya Miyagi had just come back from the 2023 World Baseball Classic. On March 31, Yamashita made his professional debut on Opening Day in a 3âÂÂ2 win against the Saitama Seibu Lions, allowing 4 hits, 1 run, and 7 strikeouts across 5 1/3 innings pitched.
In , he posted a record of 9 wins and 3 losses with an ERA of 1.61, helping the Buffaloes win the league championship and winning the Rookie of the Year award.
The pronunciation of "Shunpeita" comes from Joseph Schumpeter.