The Japan Garden Designer Association is a Japanese general incorporated association dedicated to garden design and professional development in the field. Its central program is a certification system for garden designers, intended for people who want to make garden creation their profession. The association administers certification examinations, publishes application guidance and past exam information, and shares results and administrative updates. Recent examinations have been held online, with candidates receiving Zoom access details by email.

Alongside certification, the association provides resources and learning opportunities for aspiring and practicing designers. These include garden design courses by Masao Nakano, a plant reference guide organized by color, information about trees, and articles on garden design fundamentals, history, and creative sensibility. Members can access benefits, an online salon, and a consultation service through LINE. The organization also promotes the practical value of certification, highlighting customer trust, formal certificates and recognition stickers, potential connections to work, and a nationwide community of peers.