Hario Transmitting Station is the only existing long-wave wireless communication facility in Japan. It demonstrates the sophistication of concrete technology used in Japan in the early 1900s, and is a cultural property with high historical value related to civil engineering history.
In the center of the three radio towers is a sturdy reinforced concrete transmission room.
When completed, it was a two-story building, but the first floor was buried underground in preparation for air raids during the Pacific War.
The three radio towers are arranged in an equilateral triangle, each side measuring 300 meters.
Although it was built a century ago, it was constructed with great precision and is believed to be strong enough to withstand an earthquake of magnitude 6.
The Oil Depot was used to store gasoline, diesel oil, and kerosene, so it was built with reinforced concrete to withstand powerful explosions. It is a stone structure with few openings, and its solid construction resembles a telegraph room.
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