 Bonshō ( Japanese : <unk> , Buddhist bells ) , also known as <unk> ( <unk> , hanging bells ) or <unk> ( <unk> , great bells ) are large bells found in Buddhist temples throughout Japan , used to summon the monks to prayer and to demarcate periods of time . Rather than containing a clapper , bonshō are struck from the outside , using either a handheld mallet or a beam suspended on ropes . 
