This Obaku Zen temple is best known by the momuments to mourn the victims of Eitaibashi Bridge collapse in 1807 which claimed the lives of 440 people. Sanmon Gate of the temple is a typical Edo period Yotsuashimon style in which the gate is suppoerted by four supporting pillars.
Anyoin Temple was built as one of the sub-temples of Ryusenji Temple better known by its nickname Meguro Fudoson. The temple is best known by a small museum called "Anyoin Museum of North India and Tibetian Buddhism" When I went there on August 4 the museum was still closed. It will reopened sometime in Autumn.
Also see this Japan Times Article about its unique museum.
Meguro Gajoen, one of the most popular wedding venues as well as upscale lodging place in Tokyo, may be a nice place to visit as well. It has a fancy gallery and high-class restaurants. Right behind its hotel-wedding complex is an office building, Arco Tower, 103 meters in height, adding grace to cherry views along Meguro River during early April.
Meguro river is one of the most popular cherry viewing spots in Meguro/Ebisu areas. Views from Meguroshinbashi Bridge in particular is great even out of cherry season.
Panoramio Photo from the same bridge during cherry season.