Distinguishing the Four Nyorai: Using Mudra, Attributes, and Direction
Shakyamuni Nyorai: Earth-Touching and Meditation Mudras
Shakyamuni Nyorai is the deified form of the historical person Gautama Siddhartha. The koma-in (earth-touching mudra, Bhumisparsha mudra) shows the right hand on the knee with fingers pointing downward, representing “the moment of enlightenment, repelling evil.” The zenjo-in (meditation mudra) shows both hands resting on the knees with thumbs touching, indicating deep meditation. No ornaments whatsoever.
The Shakyamuni Triad enshrined in the Golden Hall of Horyuji Temple (Ikaruga, Nara), created in 623 CE during the Asuka period, is famous as one of Japan’s oldest gilt-bronze Buddhist statues, made by the sculptor Tori Busshi.
Amida Nyorai: The Welcome Mudra (Finger Ring)
Amida Nyorai (Sanskrit: Amitābha, Infinite Light) presides over the Western Pure Land. The raigoin (welcome mudra) forms rings with the thumb and index finger (or middle finger) of both hands, representing the moment of “coming to welcome a soul to the Pure Land.”
The Great Buddha at Kotokuin (Kamakura Daibutsu) (Kamakura, Kanagawa) is a bronze seated Amida Nyorai approximately 11.3 meters high. The Amida Nyorai seated figure at Byodoin Hoo-do (Uji, Kyoto) by Jocho (1053) is designated a National Treasure.
Dainichi Nyorai: Crown and Ornaments, Chiken-in or Hokkaijo-in
Dainichi Nyorai (Sanskrit: Mahāvairocana) is the root Buddha of Shingon and Tendai esoteric Buddhism. The most distinctive feature separating it from other Nyorai is the crown and ornaments. In esoteric Buddhism, it is taught that even after attaining enlightenment, this Buddha continues to take the form of a sovereign to save sentient beings.
The chiken-in (wisdom-fist mudra) (left index finger raised, wrapped by the right hand) is the mudra for Kongokai Dainichi; the hokkaijo-in (dharmadhatu meditation seal) (both hands placed at the abdomen with thumbs touching) is for Taizokai Dainichi.
Yakushi Nyorai: The Medicine Jar in the Left Hand
Yakushi Nyorai (Sanskrit: Bhaiṣajyaguru) presides over the Eastern Lapis Lazuli World and governs healing of illness and longevity. The yakubo (medicine jar) held in the left hand is unique to Yakushi Nyorai and not found on other Nyorai. The right hand forms the semui-in (abhaya mudra).
The Hakuho-period (680s) Yakushi Triad installed in the main hall of Yakushiji Temple (Nishino-kyo, Nara) is the pinnacle of Hakuho sculpture called “frozen music.”