Hi everyone,
While researching what these small holes where used for, I found this discussion and would like to share an interesting feature of my latest tsuba. The holes are integrated into the design as an "opening" for the river to flow from the back of the tsuba to the front. The interesting part is that one of the holes is "hidden" behind a rock. It is carved sideways (don't know how to describe it), which must have been extremely tedious. So whatever these holes were used for, it must have been important to warrant this amount of work...