This book is the first comprehensive large-scale dictionary of chanoyu (the Japanese tea ceremony) in both English and Japanese. It contains 3,300 entries covering the entire field of chanoyu, including tea ceremony terms, tea utensils, tea rooms, tea masters, tea schools, kaiseki cuisine, the history of the tea ceremony, and related topics such as senchado, kodo, rikka, and Zen Buddhism. More than 900 beautiful photographs and concise illustrations are provided. The kao (stylized signatures) of tea masters, essential for authentication, are also listed. In addition to Japanese and English entry indexes, the dictionary includes a unique category-based index, making it truly useful. Authored by Koichi Eugene Okamoto, Ph.D., a former Fulbright scholar and prominent tea ceremony practitioner, the English text captures subtle nuances, making it a valuable reference not only for tea ceremony practitioners but also for those interested in Japanese culture.