I guess this just speaks to how safe and boring Japan is if just going to a pond and fishing out on it was considered super dangerous. We did way more 'dangerous' things as kids, including running all around woods we knew had bears - we even ran into some, knew how to back off. And you want really dangerous? The moose! We biked all over town, we hiked up mountains. And we had a fairly large lake next to the house we'd take the folbot out onto - no fish in it though, had to go elsewhere for that.
Otherwise, liked the chapter, and yeah a wild boar can mess you up!