Nitchō was the stepson of Toki Jonin. In his youth he studied Tendai Buddhism, but joined Nichiren on Jonin's recommendation, and followed him to Sado Island. He helped Nikkō found Honmon-ji.
Nitcho (日頂) is not to be confused with Nitcho (日澄) (1262-1310), who was Toki Jonin's biological son. Nitcho (日澄) became Nikko's disciple in 1300, and became the first chief instructor of Omosu Seminary.