Catching Goldfish at a Fishing Pond in Tokyo

A few minutes' walk from Asagaya Station, Tokyo, is a traditional goldfish fishing pond that has been operating in a quiet residential area for more than 90 years. Anybody can casually stop by and drop a line in the pond, which is popular with adults and children alike. The customers we encountered included a man who has been regularly fishing there for more than 50 years, a man who drives for 3 hours every weekend to try his luck at the pond, and a woman who catches up to 200 goldfish in just one day. What are they thinking about as they sit around this pond richly stocked with various varieties of goldfish?