High Quality Content by WIKIPEDIA articles! Wada Yenz? Nei (* 1787; † 1840) was a Japanese mathematician. He was born in Yedo in the province Harima under the name of K?yama Naoaki. In his early years he served in a buddhist temple in Yedo under the name Z?j?ji. When he left the temple he changed his name for unknown reasons to Wada Nei and worked under the patronage of lord Tsuchimikado the calendar maker of the court of Mikado. There he started to take up mathematics and was a student of Kusaka Sei. Kusaka Sei himself was a student of Ajima Chokuyen.

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