Belonging to the Shingon Sect's Buzan school, this is one of Tokyo's major temples. The real name is Sojiji (總持寺), but everyone calls it Nishi-Arai Daishi.
The temple grounds feature many flowering trees and plants including an unusual species of cherry blossoms which bloom in winter. Daishi-mae Station. Much larger station than I expected. Probably for the New Year's crowds. 大師前駅