On the 22nd, the Chiba Lotte Marines announced that they had called off their farm league game against the Orix Buffaloes Buffaloes at Lotte Urawa Baseball Stadium in Saitama City in the middle of the fourth inning due to extreme heat. According to the NPB (Nippon regular season, and this is an unprecedented situation, as it is "not within the scope of what can be confirmed" even in farm regular season.

The game started at noon when the temperature in the city reached 36.7 degrees. During the heatstroke alert, an unusual incident occurred in the fourth inning. Koshiro Wada outfielder (27), who started as the seventh batter and right fielder with a one-run deficit, took the leadoff spot to bat. He swung and missed with a weak swing struck out After returning to the third base dugout, he complained of heatstroke symptoms and was rushed to a hospital in Saitama Prefecture. Ryusei Miyazaki infielder (25), who started as the fifth batter and shortstop, reportedly reported feeling unwell.

The game was suspended from 1:17 p.m. to 2:04 p.m., but it was deemed impossible to continue and the game was declared a no-game. A spokesperson for the Lotte Marines explained, "Several players showed signs of heatstroke, so the host team consulted with umpire and, after confirming with the opposing team, decided to cancel the game." The city recorded a high of 39.1 degrees Celsius at 2:24 p.m. Wada received treatment, including an IV drip, at a hospital before returning to the stadium and then going home to recuperate. The game against Orix Buffaloes on the 23rd will proceed as scheduled, but Wada will rest as a precaution.

Most recently, The Giants Urata had to leave the game against Yakult on the 14th (at Jingu Stadium) due to numbness in his hands and feet. DeNA pitcher Ise took the mound in the 8th inning of the game against Hanshin Tigers on the 21st (Koshien), but had to leave the game in the middle of the 9th inning due to symptoms of heatstroke. Manager Saburo, who managed the Lotte minor league team until midway through last season, commented after the game against Rakuten Eagles, "It's really dangerous. When it gets this hot, you have to think about whether it's even safe to be playing baseball. There's no wind ground and it must be close to 50 degrees Celsius. I've talked to the team management and we want to do our best to reduce the number of players who suffer like this."