During the Bon season, I found myself wondering about the differences between early Buddhism and Buddhism as it is practiced in Japan today, so I asked a generative AI to summarize them as follows.
Differences in Objects of Faith
Early Buddhism regarded the Buddha, Siddhartha Gautama, as its sole teacher and taught people to seek enlightenment through their own efforts. In contrast, Japanese Buddhism has many objects of devotion, including Amitabha Buddha, the Medicine Buddha (Bhaisajyaguru), Kannon (Avalokiteshvara), and Fudo Myoo (Acala). Many Japanese Buddhist schools place considerable emphasis on tariki hongan—reliance on the saving power of the Buddha's compassion rather than on one's own efforts. In Jodo Shinshu (True Pure Land Buddhism) in particular, the idea of salvation through Amida Buddha's Primal Vow is central to its teachings.
Differences in the Goal to Be Attained
Early Buddhism focused on self-benefit (jiri), that is, attaining personal liberation from the cycle of rebirth and reaching the state of an arhat. Mahayana Buddhism, which forms the foundation of Japanese Buddhism, on the other hand, aims at benefiting others (rita): saving all sentient beings and seeking salvation on a much broader scale.
Precepts and Monastic Life
In early Buddhism, monks were required to observe a strict set of approximately 250 monastic precepts known as the Vinaya, including prohibitions against killing, stealing, sexual misconduct, lying, and drinking alcohol. Monks were also forbidden to marry. Their food was limited to what was offered to them through alms rounds. In Japan, however, beginning with Saicho, Mahayana precepts, particularly the Bodhisattva Precepts, came to occupy a more central position, and the boundary between monastics and laypeople became less rigid. Furthermore, following the Meiji government's legalization of meat eating and marriage for Buddhist clergy, most Japanese Buddhist schools today permit priests to marry, eat meat, and drink alcohol. Buddhist temples have also increasingly become hereditary institutions.
Changes in Social Role
The primary concern of early Buddhism was the practice of attaining enlightenment and liberation from the cycle of rebirth; funerals and ancestor worship were not its original purpose. In Japan, however, Buddhism has historically developed a strong association with funerals and memorial rites. Funerals, memorial services, graves, mortuary tablets, and ancestor worship have become major functions of temples and Buddhist priests. This development was influenced by the long history of the syncretism of Buddhism and Shinto, as well as by the danka system established during the Edo period.
Ritual and Magical Elements
Early Buddhism rejected magical practices such as ritual prayers for divine protection and emphasized practical methods such as observing the mind and meditation, including vipassana. Japanese Buddhism, particularly the Shingon and Tendai schools, by contrast, has incorporated a wide range of esoteric rituals and practices aimed at obtaining worldly benefits, including goma fire rituals, prayers, the distribution of protective talismans, and prayers for the protection of the nation. Esoteric Buddhism, which systematized practices such as mantras, ritual hand gestures (mudras), and mandalas—elements that were not part of early Buddhism—also developed extensively in Japan.
Diversification of Methods of Practice
Early Buddhism sought to overcome one's own defilements and attain Nirvana through the Four Noble Truths, the Noble Eightfold Path, and the cultivation of morality, meditation, and wisdom. In Japanese Buddhism, the methods of attaining enlightenment or salvation have become highly diversified according to the school: reciting the nenbutsu in Pure Land Buddhism and Jodo Shinshu, chanting the daimoku in Nichiren Buddhism, seated meditation (zazen) in Zen Buddhism, and mantras and goma fire rituals in Shingon Buddhism, for example.
Relationship with Gods and Other Religions
In early Buddhism, the gods of India were regarded as beings who were themselves subject to the cycle of rebirth and were not considered ultimate saviors. In Japan, Buddhism came to be deeply integrated with Shinto. Buddhist temples and Shinto shrines coexisted, and a distinctive form of religious syncretism known as shinbutsu shugo developed, in which Shinto deities were regarded as manifestations of Buddhas and bodhisattvas.
Summary
Whereas early Buddhism was a relatively small religious community centered on individual enlightenment and liberation from the cycle of rebirth through monastic practice, Japanese Buddhism has undergone a profound transformation through the development of Mahayana Buddhism, the rise of Esoteric Buddhism, the syncretism of Buddhism and Shinto, and social institutions established from the Edo period onward. As a result, it has evolved into a more lay-oriented and socially embedded form of religion, encompassing devotion to a wide variety of Buddhas and bodhisattvas, salvation through the power of others, funerary and memorial rituals, and prayers for worldly benefits.