Kukyoin Nisshin Shonin received Ogurayama land from Suminokura family, for his retreat.
1596～1615
With the support of Kobayakawa Hideaki, the Guest Hall (kyakuden) of Momoyama Castle was moved to this temple and became its main hall (hondo).
1616
The south gate (built 1345-46) to the Guest Hall of the head temple, Honkokuji, was moved to this temple to serve as the Niomon Gate.
(Nio Deva statue attrib. the famouse 13th c. Buddhist sculptor, Unkei.)
1620
Through a donation by Tsuji Tobei Naonobu, the Tahoto pagoda was built. It enshrines Shaka Nyorai and Taho Nyorai.
1641
The belfry was built.
1715
An imperial name plaque for the Tahoto pagoda, reading "Heisonkaku" (Pavilion of Two Respected Images), was received from Emperor Reigen,
and a plaque reading "Gokito-dokoro" (Honorable Prayer Place), calligraphed by Lady Joshoin of the princely Fushimi-no-miya family, was received for the main hall.
1801～1804
The Myokendo Hall, which counts as number ten on the twelvebranch Myoken zodiac of the capital, was built.
In it is a statue of the bodhisattva Myoken in the "nosegata" pose, the statues of Kishimojin and the Jurasetsunyo that Nisshin Shonin performed the "eye-opening" ceremonies for, and a statue of Daikokuten.
1890
The Immortal Poets Shrine that existed before the temple's establishment and was moved to the summit of the hill during the founder's time was rebuilt.
Tomioka Tessai wrote the name plaque for it. This shrine was again rebuilt in 1994. Inside are statues (Muromachi period) of Fujiwara Teika and Ietaka in seated poses.
1892
Jojakkoji became an official affiliate temple (Perpetual Non-Gold-Brocade 2nd Class) of the Nichiren main temple, Honkokuji.
1990
The Shien Mausoleum for interring the ashes of non-married women was established, as conceived by members of the 'Monument to Women' Society.
2004
The Founder's Hall was built, and a seated statue of Nisshin Shonin (Edo period) was enshrined therein.