Japanese flag flies in front of building. Japanese sailor operates lever of valves in engine room of submarine. Japanese Navy sailors in training test batteries and receive instruction in care of batteries. Instructor explains principles of underwater sound. Japanese Navy students get instruction from senior officers.
Japanese naval officer instructs Japanese sailors in training on underwater sound through a diagram on blackboard. Students leave the class room. Japanese Navy officer wears headphone to check sound. Japanese student makes sound in a pipe and the other wears stethoscope-like device on ears.
Japanese naval officer exercises with sailors in training. Japanese sailors play a game. White clothes hang in line. Group of Japanese Navy sailors take bath in bathing area. Japanese students write in class room. View of cherry blossoms. Naval officers salute during a Japanese Navy training graduation or deployment ceremony. One of the officers marches forward. Barracks in the background at Japanese Navy training base
Officer Young explains the importance of word spacing and letter spacing while sending a message. Depiction of Dits and Dahs on screen. He explains by examples that the message sent was 'We got here' but due to difference in spacing receiver will read 'We go there'. Another example shown on screen 'We train today' will become 'Wet rain today'.
Film opens showing a large well equipped gymnasium in a Japanese school. Some boys are holding onto climbing ropes, watching as several boys run toward the camera, jumping over obstacles. Two of them do somersault vaults over theirs. Next, a large group of boys in meager undershorts and bathing caps run down down the steps of their school behind their teacher, who wears a regular bathing suit. Next, the boys run under a battery of showers to enter a swimming pool. One takes a large beach ball with him. Several closeups follow, of boys and girls standing in front of their school building. Film ends showing very closeup views of an individual boy and girl.
A private high-wing parasol monoplane takes off and passes directly over the camera. A glimpse of factories and smoke stacks in the background, during takeoff. From that airplane, the Japanese ocean liner, Chichibu Maru, is seen underway in water below. Scene shifts completely to interior of a Japanese steel mill, where fiery molten steel rushes out of an open hearth furnace; fire shoots upward from a bessemer converter furnace; A conveyer transports a large crucible of molten steel inside a plant; closeup of its contents being poured into another container. An open hearth furnace about to disgorge its molten steel, with some already running out. Japanese steel workers standing on platform as a crucible of flaming steel passes on a conveyer. Molten steel flaming brightly in various areas within the steel mill as conveyer moves a large crucible in foreground. Closeup of a flaming steel-filled crucible. Scene shifts to workers in a Japanese shipyard. A number of commercial ships are in the waters behind them. Camera changes focus to scaffolding surrounding a large ocean-going ship under construction. Next it shows another nearly-completed ship with "Chichibu Maru" painted on her hull. Next, the Chichibu Maru is seen going down the ways as she is launched on 8 May, 1929. (She would complete fitting out on 10 March, 1930.) Closeup of the hull as she plunges into the water on launch. Some crew and yard workers look down from her deck. Banners are displayed from the launching ceremony. View from a small boat moving around the Chichibu Maru, as she departs on an ocean voyage. Her passengers line the decks, waving goodbyes.