Hanazono Jinja (花園神社) is a Shinto shrine adjoining the Kabukicho district of Shinjuku, which is one of the most well-known entertainment area in Japan. It is within several minutes' walk from Shinjuku-sanchome Station of the Tokyo Metro Marunouchi Line, Fukutoshin Line and the Toei Shinjuku Line, but it's not so far from Shinjuku Station, too. For details about this shrine, see the article on Hanazono Shrine.
The Reitaisai, or the Annual Grand Festival, of this shrine is held in late May.

Reitaisai at Hanazono Jinja

At the Reitaisai (例大祭), or the Annual Grand Festival, of Hanazono Jinja, which is held in late May every year, in odd-numbered years there's a procession of shrine-owned mikoshi, and in even-numbered years there's a joint procession of community-owend mikoshi.

Procession of Shrine-owned mikoshi

On Sunday, in odd-numbered years, two mikoshi owned by the Shrine hold a parade through the area the shrine divinities protect all day long.

Honsha mikoshi, which is one of the two shrine-owned mikoshi, is the main mikoshi.

Raiden mikoshi, the other mikoshi owned by the shrine, is a mikoshi which is dedicated to the shrine deity of Raiden Inari Shrine which was merged into Hanazono Shrine in 1928.

Joint procession of community-owned mikoshi

In even-numbered years, on Sunday, mikoshi owned by the communities within the district Hanazono Shrine guards conducts a joint parade from the shrine.