After a steep hike to the stairs, you will be rewarded by the atmosphere of this peaceful and quiet temple. Note that the temple is rather well-hidden.
Wikipedia https://ja.wikipedia.org/wiki/市谷亀岡八幡宮
Official Website http://www.ichigayahachiman.or.jp/
Address (Unnamed Road), Tokyo, Japan
Coordinates 35°41'33.857" N 139°44'1.406" E