Whatever the belief system or whoever they're dedicated to, shrines have a way of making you contemplative. Visit Shoin Shrine and share a moment of silence with the faithful.
This sacred place is free to enter, so you can have fun without ever opening your wallet. However, Shoin Shrine isn't the only worthwhile attraction in and around the urban ward of Setagaya. With Tokyo Tower, Tokyo Imperial Palace and Meiji Jingu Shrine not far away, you may want to stay a little longer.