Baseball Data Viewer is an online reference for baseball statistics and player information, bringing together data from Japan’s Nippon Professional Baseball (NPB), Major League Baseball (MLB), and international competitions. The site presents baseball records in Japanese, allowing visitors to review familiar measures such as batting average, home runs, and earned run average, alongside player profiles and performance results.

Users can explore team pages and career totals, season records, yearly leaders, and awards for both NPB and MLB. Dedicated international baseball sections cover the World Baseball Classic (WBC), Premier12, and the Olympic Games, with team and competition information. A player-name search helps visitors find individual records, while a glossary provides explanations of baseball terminology.

Baseball Data Viewer describes its statistics and profiles as freely available, making the site a convenient resource for fans seeking to look up historical or seasonal performance across leagues and tournaments. The site also provides information about its services, privacy policy, terms of use, and a contact option.