Ikegami Honmon-ji is a temple of the Buddhist sect Nichiren Shū south of Tokyo, which was built where the founder of the Nichiren sect is said to have died. Nichiren's disciple Nikko also spent the rest of his life in this temple. On the site of the temple is also the administrative seat of Nichiren Shū.
A short walk from Ikegami Station or Nishi-Magome Station, Ikegami Honmon-ji is home to a number of buildings, most of which were reconstructed after the March 15, 1945 bombing. These include the five-storey pagoda, built in 1608, which is recognized as an important cultural asset. The kyōzō pagoda, built in 1784, is a repository of religious writings and the hōtō pagoda, built in 1781, where Nichiren was cremated. Other buildings have been rebuilt or rebuilt since 1945.