Visiting the graveyard of the 47 ronin

While in Tokyo, we had to visit the Sengaku-ji temple, where the famous 47 ronin are buried. Their master's tomb is also located here, and there are a couple of places worth visiting, like the well that the ronin used to wash the head of Kira Yoshinaka (the one responsible for their master's death) before presenting it in front of the tomb of their master; or the stone and tree that where stained by the blood of Asano (the ronin's master), when he committed seppuku.
You know, the usual japanese history...