Japan Apnea Society, also known as the Japan Freediving Association, promotes the healthy and safe understanding and development of freediving in Japan. The association provides information for people interested in the sport, from newcomers learning how to get started to participants seeking guidance on safe practice. Its resources explain what freediving is, how it differs from other forms of breath-hold diving, its history, and its competitive disciplines. The society also introduces instructional organizations, including AIDA Japan and CMAS Japan, where prospective participants can find beginner courses.

Safety is a central focus. The association shares safety principles and guidance for people involved in freediving, and provides a channel for reporting accidents and near misses. It also publishes competition schedules, results, announcements, and updates about Japanese championships and international events, including information for athletes seeking national-team selection. Members and interested individuals can find association details, governing rules, frequently asked questions, and online forms for joining or leaving.