Baseball's declining popularity in Japan is attributed to factors like the aging population, diverse interests, changing playing environments, and economic burdens, requiring collaborative efforts to preserve the sport's culture.

"Rubber Baseball" is a popular sport in Japan, with around 40,000 teams, including many adult teams. It appeals to working adults and newcomers seeking a fun baseball experience. The sport's familiarity and accessibility attract a wide range of participants, leading to the formation of teams with diverse backgrounds. Besides its popularity in Japan, "Rubber Baseball" has gained recognition worldwide, with international tournaments and players transitioning to professional baseball. Its inclusive and enjoyable nature ensures its continued growth as an exciting sport for enthusiasts globally.

　"Rubber Baseball" is a sport that originated in Japan and is a distinctive form of baseball that uses a rubber ball instead of baseball's original leather ball. It has played a role in Japanese baseball culture and has contributed greatly to the development of baseball enthusiasts and athletes.