Day 2 and finishing up next to the Komatsugawa Bridge near Hirai, the final count was 75 bags of trash (70 actual bags + roughly equivalent of 5 bags for large unbagged items) by just 2 people. We didn’t get everything but we got a lot. I think this activity was a good lesson in what is possible even a small number of participants. Particularly if a dirty area is selected, even one person can achieve a big result. There is a before video in the comments (taken by a member) and and after video in the post.