What powers a shishi odishi out in the field where there is no electricity? (sorry about the spelling)
As per my knowledge, it is placed along a stream of flowing water, so water naturally fills it up and it makes that wonderful clanking sound while getting emptied.
Hope this helps!
It's "shishi odoshi". There's lots of information including YouTube videos you may find informative.
Here is a link that might be useful: Shishi Odoshi