Japan Geoscience Union Meeting 2025

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[J] Poster

A (Atmospheric and Hydrospheric Sciences ) » A-AS Atmospheric Sciences, Meteorology & Atmospheric Environment

[A-AS10] General Meteorology

Mon. May 26, 2025 5:15 PM - 7:15 PM Poster Hall (Exhibition Hall 7&8, Makuhari Messe)

convener:Shimizu Shingo(National Research Institute for Earth Science and Disaster Resilience), Hisayuki Kubota(Hokkaido University), Shiori Sugimoto(Japan Agency for Marine-Earth Science and Technology), Tomoe Nasuno(Japan Agency for Marine-Earth Science and Technology)

5:15 PM - 7:15 PM

[AAS10-P01] Warm Air Temperatures Generate Home Runs in the Nippon Professional Baseball

Hinako Sato1, *Tsubasa Kohyama1 (1.Department of Information Sciences, Ochanomizu University)

Keywords:Air temperature, home run, baseball, global warming

As one of the broader impacts of climate change on various aspects of society, including sports, the impact of rising temperatures on home run frequencies in Japan’s Nippon Professional Baseball (NPB) is examined. Building on previous research from Major League Baseball (MLB) in the United States, we found that higher temperatures correlate with more home runs, but only in outdoor stadiums, which supports the idea that temperature affects ball flight by reducing air density. Our findings are consistent over different time periods and suggest that climate change could increase home run numbers. However, no clear trend of more home runs due to recent warming was observed. Further research is needed to understand the factors affecting this phenomenon in different stadiums.