Shinjuku Kumano Shrine
Juniso Kumano Jinja (十二社熊野神社) is a Shinto shrine located in Shinjuku Central Park, which is next to skyscrapers including the Tokyo Metropolitan Government Building. It is said to be founded around 14th to 16th century, and is the overall spiritual protector of the area around JR Shinjuku Station.
Kumano shrines are quite common in Japan, and most of them, including this shrine, are spiritual branches of either Kumano Hongu Taisha, Kumano Shingu Taisha, or Kumano Nachi Taisha, all three of them located in Wakayama Prefecture.
It's a 4-min walk from Toei Oedo Line Nishishinjuku-gochome Station, or a 5-min walk from Tochomae Station of the same line.
Kaguraden is the stage where music is played in ceremonies.
Haiden is where you offer prayers to gods enshrined.
Honden is the building which divinities are enshrined.
Naruko Tenjin Shrine is relatively near this site.