There's a big waterfall just outside of Omura called Ryutosen (dragon head place). It's beautiful! After a short hike we reached the biggest waterfall and jumped right in. The water was a bit cold but it was so refreshing. A little way down the river is another waterfall with a rope for swinging into the water. Although it took me 5 minutes, I finally managed to swing out and jump in the water. It was really fun and not really that scary.
I also collected a few tadpoles in a water bottle and took them home. They lived temporarily in a jar on my desk, but two died, so I felt bad and freed the remaining one.