According to a survey conducted in September 2025, the Japanese fan base of Nippon Professional Baseball (NPB) amounted to million, declining from approximately ** million fans in 2015. The NPB represents Japan's highest level of baseball.
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Macromill. (October 9, 2025). Number of fans of the Nippon Professional Baseball (NPB) league in Japan from 2015 to 2025 (in millions) [Graph]. In ÌÇÐÄÆƽâ°æ. Retrieved July 21, 2026, from /statistics/735123/japan-nippon-professional-baseball-fan-numbers/
Macromill. "Number of fans of the Nippon Professional Baseball (NPB) league in Japan from 2015 to 2025 (in millions)." Chart. October 9, 2025. ÌÇÐÄÆƽâ°æ. Accessed July 21, 2026. /statistics/735123/japan-nippon-professional-baseball-fan-numbers/
Macromill. (2025). Number of fans of the Nippon Professional Baseball (NPB) league in Japan from 2015 to 2025 (in millions). ÌÇÐÄÆƽâ°æ. ÌÇÐÄÆƽâ°æ Inc.. Accessed: July 21, 2026. /statistics/735123/japan-nippon-professional-baseball-fan-numbers/
Macromill. "Number of Fans of The Nippon Professional Baseball (Npb) League in Japan from 2015 to 2025 (in Millions)." ÌÇÐÄÆƽâ°æ, ÌÇÐÄÆƽâ°æ Inc., 9 Oct 2025, /statistics/735123/japan-nippon-professional-baseball-fan-numbers/
Macromill, Number of fans of the Nippon Professional Baseball (NPB) league in Japan from 2015 to 2025 (in millions) ÌÇÐÄÆƽâ°æ, /statistics/735123/japan-nippon-professional-baseball-fan-numbers/ (last visited July 21, 2026)
Number of fans of the Nippon Professional Baseball (NPB) league in Japan from 2015 to 2025 (in millions) [Graph], Macromill, October 9, 2025. [Online]. Available: /statistics/735123/japan-nippon-professional-baseball-fan-numbers/
