Many people would like to experience fishing in Japan. And I think you guys would be very happy if it could be done with small children as well.
If you are an adult you could leave home in the middle of the night, go to the distant sea, rent a boat and go fishing for squid or big fish. But if you are a beginner or if you have kids with you, I would suggest you to enjoy fishing at this fishing pond.
The day I recommend is a day when it is not raining. Also, a day that is not too hot.
You don’t need to bring any special fishing gear at all. They will lend you bait and gear.