About four kilometers north of Hiroshima sits a heritage site over 400 years old.
There is also a bell tower which I somehow missed, which was also built in the 16th century.
The roofs of the buildings were damaged by the atomic bomb in 1945, but the structures remained intact and are the only real historic buildings that remain in Hiroshima.
As mentioned above, Fudo-in is easily reached by train to the Fudoinmae Station. The temple is on the east side, just down the stairs. Head towards the left away from the tracks. You can see a map here.