Kūkai
![Painting of Kūkai from the ''Shingon Hassozō'', a set of scrolls depicting the first eight patriarchs of the Shingon school. Japan, [[Kamakura period]] (13th-14th centuries).](https://upload.wikimedia.org/wikipedia/commons/8/8c/Eight_Patriarchs_of_the_Shingon_Sect_of_Buddhism_Kukai_Cropped.jpg)
, 27 July 774 – 22 April 835}}, born posthumously called , }}, was a Japanese Buddhist monk, calligrapher, and poet who founded the
esoteric Shingon school of
Buddhism. He travelled to China, where he studied
Tangmi (Chinese
Vajrayana Buddhism) under the monk
Huiguo. Upon returning to Japan, he founded Shingon—the Japanese branch of Vajrayana Buddhism. With the blessing of several
Emperors, Kūkai was able to preach Shingon teachings and found Shingon temples. Like other influential monks, Kūkai oversaw public works and constructions.
Mount Kōya was chosen by him as a holy site, and he spent his later years there until his death in 835 C.E.
Because of his importance in Japanese Buddhism, Kūkai is associated with many stories and legends. One such legend attribute the invention of the ''
kana'' syllabary to Kūkai, with which the
Japanese language is written to this day (in combination with ''
kanji''), as well as the ''
Iroha'' poem, which helped to standardise and popularise ''kana''.
Shingon followers usually refer to Kūkai by the honorific title of , and the religious name of .
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