>> reporter: kimura is confident there is a potential for night dive here because of the sea creatures>> translator: this one you can only see late at night. >> reporter: it's late at night when they arrive at the bare shore. [ speaking foreign language ]. they dive into the darkness using underwater lights to see their way. at 20 meters they spot a devils sea robin which greets them with its colorful pectoral fins. this little creature is just 5 centimeters long. in japanese it's called an ear squid probably because of its shape. it's popular with divers for the way it burrows into the sand. this is a fire fly squid. they give off a color as they rise up to spawn. they are a speciality of toyama. when they get down to 30 meters. they see a creature that is rarely seen anywhere else but in toyama bay. this fish with a body like a a species known as cubed snail fish. this fish live about 200 meters down and only come close to shore in the spring. it's another fish that can only be seen late at night. >> translator: i was so impressed. i'm glad i came here. >> translator: night diving he