Kuzuharaoka Jinja (sometimes referred to as Kuzuharagaoka Shrine) owes its existence to the execution of Hino Toshimoto, a scholar famed for his poetry.
Hino, a court official loyal to Emperor Go-Daigo, was twice caught plotting to overthrow the Kamakura Shogunate. Though released the first time, he was found guilty and sentenced to death the second time. In June 1332 (the exact day varies depending on the source — in fact, the year does, too), Hino was executed where the shrine now stands.
Roughly 555 years later, Kuzuharaoka Shrine was established, with the spirit of Hino Toshimoto the object of worship.
The shrine sits mid-way along the Daibutsu-Kuzuharaoka hiking path that runs from Jochi-ji (Jochiji Temple) in Kita-Kamakura to the Hase area of Kamakura, near the Great Buddha of Kotoku-in (Kotoku Temple). It has a small water garden with fish, turtles and water irises, a spot to smash some little clay plates against a large stone (¥100 per plate), and a picnic area under tall trees. (Beware the crows!)
Though the shrine is not one of the main hydrangea-viewing shrines, it should be. The grounds are covered in hydrangea bushes, and during the rainy season (late May/early June to late June/early July), the shrine is covered in blossoms. The grounds also have quite a few cherry trees and bushes from the rhododendron family (whether azaleas or rhododendrons, I’m not sure — I never get it right).
The big draw at Kuzuharaoka Shrine is the enmusubi ishi, or marriage-/love-knot stone. The enshrined deity is Daikoku-sama, who in addition to being one of the Shichi Fukujin (Seven Gods of Fortune) is also known as a god of matchmaking. Not surprisingly, the ema or votive plaque at Kuzuharaoka is in the shape of a heart.