. >> reporter: hirose meet fisherman to talk about it. people in the fishing industry are seeing their catches dwindle every year. they are increasingly concerned about conserving resources. >> translator: because we're starting to find out how many fish there are and in which locations we'll know how many there are in total, and that will tell us how much we can take sustainably. >> translator: if we can take the least amount necessary it will help us protect our resources. >> reporter: hirose believes his technology could eventually help solve the problem how to protect fisheries. >> translator: i want to keep eating fishh caught in the wild and make sure my children and grandchildren can do the same. i feel this system is an essential tool to help us leave an appropriate number of fish in the sea. >>> the rainy season just started in the southwestern islands of japan. torrential rainfall has already been reported in okinawa. our meteorologist tells us what residents will need to watch out for in this world weather update. >> we are exp