The history of the garden can be traced back nearly 350 years to the Edo period.
In 1650, Hidemoto Mohri, the grandson of Motonari Mohri, became protector of the province of Kai and constructed an estate in Azabu Higakubo (currently Azabu 6-chome). This marked the creation of the garden.
After that, Genroku 15 years (1702 years), after the Kira Residence entrance, ten people including Masaru Ako and Okajima Hachiemon were entrusted to Mohri (Hosokawa, Mori, Matsudaira, Mizuno, divided into four houses) . In February of the following year, all of us won the samurai in this place in this place.
Maresuke Nogi, who later became an army general during the Meiji period, was born in 1849, the third son of Maretsugu Nogi, at the family's samurai manor in the Chofu domain. Maresuke Nogi lived here for 9 years of his childhood at the Higakubo estate.
In 1865, Sagami Hotta received the Higakubo estate.

Times changed, and Rokuichiro Masujima (1857-1948), lawyer, legal scholar, doctor of laws, and founder of Chuo University in 1887, acquired the property for his own home and named the garden the "Houkien".
In April 1919, the garden was appropriated as an historical site (currently a Metropolitan Tokyo historical site) as the "Birthplace of General Nogi."

In March 1943, it was designated as a historical site (currently Metropolitan Tokyo historical site) as the remains of the Kaino Mohri estate. In March 1952, Nikka Whisky built its Tokyo plant on this location. The site was acquired by TV Asahi in 1977. The pond became known as Nikka Pond.

The Roppongi 6-Chome District Urban Redevelopment Union was established in 1998, and work began on redeveloping the area in April 2000. Roppongi Hills opened in April 2003. The garden was reborn as the Mohri Garden.