(Note: numbers in parentheses after kami names
From Merged Shrines
Shirayama Sha 白山社
Onnazuka Reishin 女塚霊神
Inari Jinja 稲荷神社
Annual Festival: July 23 and 24
Onnazuka (lit. “Female Mound”) Jinja was originally a Hachiman Jinja which was the tutelary shrine for what were then Onnazuka and Misono Villages and is now the area close to the east exit of Kamata Station. When it was founded is unclear, but it must have been no later than 1614 as the Shin-pen-Musashi-Fudo-Kiko notes its completion in that year.
In 1888 the shrine moved to its present location following the construction of the Shimbashi-Yokohama railway line and was given its present name, while Misono Jinja was designated as the shrine for the Misono Village. The two shrines are less than 500m apart.
The Onnazuka name is derived from an episode during the Nanboku Period of the fourteenth century. Nitta Yoshioki (新田義興, on the Southern Imperial Court Side) had devised a plan to attack the Ashikaga (Northern Imperial Court) in their Kamakura stronghold. Takezawa Ukyōsuke (竹沢左京亮), who at this time was an Ashikaga retainer but whose allegiance had previously been with Nitta, became aware of this and drew up his own plan to assassinate Nitta. This involved reingratiating himself with Nitta and to this end he summoned a court lady, Shōshō-tsubone (少将局), from Kyōto, who was presumably to use her sensual wiles on Nitta. She, however, quickly realized Takesawa’s true intent and sent a letter to Nitta informing him of the plot, which duly failed. On finding out the reason for the failure, an enraged Takesawa killed Shōshō and just cast her body aside. Out of pity and compassion the local villagers gave Shōshō a proper burial in a grave which was a small mound.
About 500m from Kamata JR Station. Reflecting its origins the "official" kami of this shrine is Homuda-wake-no-Mikoto, the Hachiman kami, but as its name suggests the Onnazuka Reishin enshrining Shōshō-tsubone is its true heart. The kami of the Shirayama Sha is Shirayama-hime Ōkami (白山比咩大神i), essentially another name for Kukuri-hime Kami (菊理媛神), who while only mentioned in the Nihon Shoki in passing, and not at all in the Kojiki, is nevertheless the main deity of the Shirayama/Hakusan Jinja grouping: Kamata puts the number of such shrines at 2,717. My own database has 1,439.