There was a moment yesterday, before the actual events were up. Fishermen event was on. I think I saw someone post a thread about it.

You sweep instances to get baits to fish at 3 different areas i.e. Konoha, Toad Mount, and Land of Waves. Different areas use different types of baits (Low-Med-Adv.)

Luckily I had a play with it. You fish and you will get points to redeem prizes and certain chance to get "Fish box" that contains items i.e. lots of Dangos and other stuff.