There are many activities you can enjoy during the summer in Hita. One of the main activities you can enjoy is fishing! You can fish by the river and you can take the fishes you caught home and cook it yourself. You can also eat the fish right after you are done! Even though the weather is very hot during the summer in Japan, the temperature of the rivers stays cool making it perfect to escape the hot and humid summer. I recommend you to come to Hita during the summer to enjoy the cool river and fish