Although the building is large and impressive looking from the outside, the temple grounds themselves are just a huge paved parking lot. Anyone is welcome to go inside, but as the hall is filled with cheap theater seats, it is not terribly impressive. There are English brochures available near the front door, and they explain the history of the temple and the important artifacts stored there. Unless you happen to be walking down the street or visiting Tsukiji Fish Market, I would not go out of my way to visit this temple.
Monthly Dharma talks in English are held generally on the last Saturday from 5:30pm. There is more information on their website: http://www.tsukijihongwanji.jp/
Morning and evening worship services (in Japanese) are held daily at 7:00am and 4:00pm. There are also special services throughout the year (New Years, Buddha's Birthday,...).
Address: 3-15-1 Tsukiji, Chuo-ku 104-8435, Tokyo
Getting there: Hibiya Line to Tsukiji Station. Or, the Oedo Line to Tsukiji-shijo Station.