Guide
The Former Sasebo Wireless Station, commonly known as the Hario Radio Towers, is a historic site located in Sasebo, Nagasaki Prefecture. It consists of three massive reinforced concrete wireless towers, each standing approximately 136 meters tall. Completed in 1922 (Taisho 11), the facility was built using the highest technological standards of the era. Today, it is designated as a National Important Cultural Property and is a key component of the Japan Heritage site 'The Naval Bases of Yokosuka, Kure, Sasebo, and Maizuru.' The three towers are arranged in an equilateral triangle with a spacing of about 300 meters, creating a striking and unique silhouette that can be seen from a distance.
This facility was constructed by the former Imperial Japanese Navy to meet the increasing demand for wireless communication following the Russo-Japanese War. The construction process took approximately four years, representing the pinnacle of engineering at the time. Historically, the site is often noted for its role in relaying coded messages related to the start of the Pacific War. Following the war, the site was managed by the Japan Coast Guard and the Japan Maritime Self-Defense Force, serving as a functional wireless facility until 1997. In 2013, the wireless towers, the telegraph office, and the oil storage building were officially designated as National Important Cultural Properties. These structures remain among the tallest surviving concrete tower-style buildings from the Taisho era.
The most breathtaking feature is the trio of 136-meter-tall wireless towers. Each tower is built with a robust structure featuring a base diameter of about 12 meters and a wall thickness of approximately 76 centimeters. The triangular arrangement of the towers creates a grand presence within the vast landscape. Additionally, the site preserves several auxiliary buildings, such as the telegraph office and oil storage facilities, which serve as precious historical records of early 20th-century communication operations. Occasionally, special public exhibitions are held to allow visitors to observe the internal structures and understand their historical functions.
The facility is generally open during daylight hours. While the massive structures can be viewed in any season, visiting during bright daylight hours is recommended to clearly appreciate the texture of the concrete and the intricate details of the towers. The silhouette of the towers against the sky changes beautifully depending on the time of day and local weather conditions. Please note that the availability of public access can vary, so it is advisable to check the latest information before your visit.
Occasional volunteer-led tours may be available. Visitors can learn about the evolution of communication technology and the unique architectural engineering of the era. For instance, during special events, such as when excavations of the base of Tower No. 1 were conducted, the underground structures were opened to the public—an experience rarely available during standard sightseeing. There are also opportunities to enter the telegraph office and oil storage buildings to physically experience the environment of early 20th-century communications.
The area surrounding the facility features scenic landscapes, including the nearby Saikai Bridge. The site is also part of the 'Sasebo Naval Legacy Trip' route, which explores various historical sites related to Sasebo's history as a major naval port city. To deepen your understanding of the local history, you may also wish to visit the historical museums located within Sasebo city.
The site covers a large area and may include unpaved paths or uneven ground; comfortable walking shoes are highly recommended. While admission to the site is free, please ensure you have cash or a credit card for any nearby transportation or dining needs. Regarding language support, please check locally if English-speaking guides or signage are available during your visit. As this is a protected historical site, please follow all instructions and respect the preservation of the structures. Photography is permitted, but please maintain proper etiquette and respect the historical environment.