Hakuin, who was born as the third son of the Nagasawa family in Harajuku, Suruga Province (Tokai-do Road), the present-day Hara, Numazu City, Shizuoka Prefecture, and became a priest at the age of 15.
駿河国原宿(東海道)（現・静岡県沼津市原）にあった長沢家の三男として生まれた白隠は、15歳で出家した。