Water world by underwater explorer Toshiaki Hirobe

The water world takes up 70 percent of the Earth!!
There are many landscapes and creatures that no one has seen yet!
We would like to slowly introduce this world to you!
The main program is released every Thursday at 9pm, and underwater explorer Toshiaki Hirobe will slowly guide you through the waters of the world, exploring caves, diving underwater, and even diving into ordinary oceans all over the world!! The program is structured to be 15 to 30 minutes long and focuses on the underwater world, so we hope you will watch it while feeling like you are slowly diving into the water with us.
Irregular
Videos about volcanoes and ocean trenches (irregular, sometimes replaces the main video)
Narrator Taruka's commentary on the main video (irregular, sometimes replaces the main video)

A world of water you can experience without getting in the water - Waterworld On the ground (irregular)
Messages from the sea that have been broadcast on TV Asahi Channel in the past