Toshi-Oshio-City High School advanced to the third round of the 108th Nagano Prefectural High School Baseball Tournament after defeating their opponent 10-0 in a five-inning “called game” on August 8. The victory occurred during the second round of the tournament, which saw six remaining matches played across the Sekisui Heim Matsumoto Stadium and Shinkin Suwako Stadium.
Toshi-Oshio-City Dominates Second Round Match
Toshi-Oshio-City secured a decisive victory by scoring 10 runs, triggering a “cold game” (mercy rule) after five innings. According to reports from the Shimin Times, the match was part of the final slate of second-round games held on August 8 in Nagano Prefecture.
In Japanese high school baseball, a “cold game” occurs when a team leads by a significant margin—typically 10 runs after five innings—resulting in the immediate termination of the game to prevent further blowouts and preserve player health. Toshi-Oshio-City hit this threshold exactly, ending the contest with a 10-0 shutout.
Tournament Logistics and Venue Details
The 108th Nagano Prefectural High School Baseball Tournament utilized two primary venues to handle the second-round schedule on August 8. Matches were split between the Sekisui Heim Matsumoto Stadium in Matsumoto City and the Shinkin Suwako Stadium in Suwa City.
These venues serve as critical hubs for the prefecture’s road to the Summer Koshien national tournament. For those unfamiliar with the geography, Matsumoto and Suwa are key cities in central Nagano, providing the infrastructure necessary to host multiple high-stakes games simultaneously.
Path to the National Stage
The Nagano Prefectural tournament is a grueling elimination process designed to select a single representative for the National High School Baseball Championship at Koshien Stadium in Hyogo. By advancing through the second round, Toshi-Oshio-City remains in contention for a spot in the national spotlight.

The efficiency of the 10-0 win is particularly valuable for the team’s pitching rotation. By ending the game in five innings, the coaching staff likely saved significant arm strength for their primary pitchers, a tactical advantage that becomes critical as the tournament progresses into the later, more physically demanding rounds.
Tournament Context and Stakes
High school baseball in Japan is characterized by intense regional pride and strict adherence to amateur standards. The 108th edition of the Nagano tournament continues this tradition, with teams fighting for the chance to play on the historic soil of Koshien.
The second round often acts as a filter, separating the dominant contenders from the early-season surprises. Toshi-Oshio-City’s ability to execute a 10-run shutout suggests a high level of offensive cohesion and defensive stability heading into the third round.
The tournament continues with the remaining winners moving into the third round. Official schedules and pairings will be updated by the Nagano Prefectural High School Baseball Federation as the bracket narrows.
Follow Archysport for further updates on the Nagano Prefectural tournament and the road to Koshien.