Video & details about the craftsmanship of bonso (梵鐘) http://www.skipcity.jp/channel/tep/1st/tep_bonsyo_480x360.html
The Bonsho is the largest bell used in the monastery, it hangs underneath a specially-designed structure. The shumoku is the heavy swinging beam used to strike the bell. It is this bell which reflects the spirit of the Buddhist temple. The ring has a peculiarly soul-pacifying effect.