Syonan Jinja was a former Shinto shrine in the middle of the MacRitchie Reservoir forest in Singapore. It was built by the Japanese Imperial Army during the Japanese Occupation of Singapore in World War II. When the British forces re-occupied Singapore, the Shrine was destroyed. However, ruins of the shrine remain and serve as a quaint piece of History accessible only to those willing to look for it, given its obscure location. The National Heritage Board declared the site a Historic Site in 2002, although no plans have been made public to develop or to protect the site.
The unmarked trail is found close to the ranger station on the Terentang Trail.