Akibasan Jinganji Temple is the nearest temple to my house in Nagoya and a peaceful place to visit. The temple only really gets lively at New Year and when the Nagoya sumo tournament takes place in July and a sumo stable makes it a training base. (Update: sadly this is no longer the case in 2015)
Akibasan Jinganji belongs to the Soto sect of Zen Buddhism and dates from the 9th century. Oda Nobunaga prayed here for victory before the Battle of Okehazama in 1560, which he duly won. The temple also has connections with the Shugendo sect of mountain ascetics.