is a Japanese former

Nippon Professional Baseball or NPB is the highest level of baseball in Japan. Locally, it is often called , meaning ''Professional Baseball''. Outside Japan, it is often just referred to as "Japanese baseball". The roots of the league can be traced back to the formation ...

pitcher In baseball, the pitcher is the player who throws ("pitches") the baseball from the pitcher's mound toward the catcher to begin each play, with the goal of retiring a batter, who attempts to either make contact with the pitched ball or draw ...

References

{{DEFAULTSORT:Yokoyama, Yukiya 1977 births Living people Baseball people from Kanagawa Prefecture Japanese baseball players Nippon Professional Baseball pitchers Yokohama BayStars players Hokkaido Nippon-Ham Fighters players