In the old days, giyaman (glass balls), which were used instead of floats attached to the net, were handmade to cover the net so that it would not break.
I don’t know any of the Japanese language but, I understood this video perfectly. I would love to see a video of one tied on a small float, about the size of a baseball or softball.
Thank you for your comment. Glass floats are rarely used now, so it is difficult to obtain small floats, but I would like to write an article when I can.