Nagoya TV Tower

A Broadcast Tower Enters the Cultural Property Register

Nagoya TV Tower (名古屋テレビ塔, Nagoya Terebi-tō) rises from Hisaya Ōdōri Park in Naka Ward, Nagoya City, Aichi Prefecture, was completed in Shōwa 29 (1954), and was designated an Important Cultural Property on 12 December 2022. It operates today under the naming-rights title Chubu Electric Power MIRAI TOWER.

The designation was the first ever granted to a tower in Japan. That is worth pausing over. The register of Important Cultural Property buildings is dominated by temples, shrines, castles and the occasional Meiji-era brick office block. A steel lattice built to transmit television signals sits oddly in that company, and the Agency for Cultural Affairs had to make a case for it.

The case rested on two designation criteria: technical excellence, and high historical value. Both were argued on the same ground. This was the first tower in Japan built to carry the transmitting antennas of multiple broadcasters at once, and the engineering that made it possible had no domestic precedent.

What Made It Worth Designating

The Shared-Antenna Idea

In the early 1950s Japanese television was starting up, and each broadcaster expected to raise its own mast. Nagoya took a different route. The city was still rebuilding from the 1945 air raids and had laid out a 100-metre-wide boulevard, Hisaya Ōdōri, straight through the centre of the burned district. A single tower on that axis could serve every station and double as a civic landmark.

Construction began in 1953. NHK Nagoya and three commercial broadcasters eventually transmitted analogue VHF signals from the same structure. The Agency's assessment identifies this as Japan's first integrated broadcast tower and treats the concept, not merely the object, as the thing worth preserving.

Naitō Tachū and the Wind Problem

The structural designer was Naitō Tachū (内藤多仲), professor of engineering at Waseda University. Nagoya was the first television tower he designed. Tsūtenkaku in Osaka followed in 1956, the Sapporo TV Tower in 1957, and Tokyo Tower in 1958. The tower you are standing under is where that sequence started.

Naitō's problem was wind. A slender self-supporting steel tower of unprecedented height in Japan had no established design method behind it, so a team of the country's leading engineers ran wind-resistance experiments and calculations specifically for this structure. The result is a frame of steel and steel-reinforced concrete standing 178.7 metres, with legs spread 35.0 metres apart at the base. Many popular guides round the figure to 180 metres; the Agency's register gives 178.7.

The construction itself was a different order of work. Mechanical plant was scarce. Foundation excavation was done with picks and shovels, and the steel members were hauled into position by hand.

The Antennas Are Part of the Designation

The listing includes an attached item: two former batwing antennas. These are the transmitting elements themselves, retained as evidence of what the structure was built to do. Analogue television broadcasting ended in 2011 and the tower stopped serving as a transmitter, so the antennas are now artefacts rather than equipment.

Visiting the Tower

Seismic Isolation Under a Listed Building

Between January 2019 and September 2020 the tower closed for the first full-scale renovation in its history. Engineers installed seismic isolation beneath a structure that was already 65 years old and standing, using a method described as a world first. The tower reopened on 18 September 2020 with its 1954 external appearance unchanged.

This is the detail that repays a slow look. Conservation in Japan usually means dismantling a building and putting it back together with the original members. Here the approach was to leave the visible fabric alone and change what happens underneath it, so the tower could keep working as a public building. The Important Cultural Property designation followed two years after the retrofit, not before it.

Two Observation Levels

The Sky Deck sits at 90 metres above ground and is enclosed. Mirrored surfaces at ceiling and floor create the kaleidoscopic effect the operators call MIRAI360. On a clear day the view reaches the Kiso Ontake range and the Central Alps.

Climb one level to the Sky Balcony at 100 metres and you are outdoors, with the wind on your face and a small planted garden. A Lovers' Sanctuary plaque was installed here in November 2008, and the tower was recognised as a Japan Night View Heritage site in November 2013.

Hours, Tickets and Access

The observation decks open at 10:00. Closing is 21:00 on weekdays and Sundays with last entry at 20:40, and 21:40 on Saturdays with last entry at 21:20. Admission is 1,300 yen for high school students and above, 800 yen for elementary and junior high school students, and free for preschool children. During evening projection-mapping events the adult rate rises to 1,800 yen and discounts do not apply. Times and prices shift for events, so confirm before you go.

Floors one to three are free to enter, which means you can walk in, look up through the lattice from directly underneath and leave without buying a ticket. The tower opens year-round apart from roughly two maintenance days annually. Photography for personal use is unrestricted; bringing professional equipment requires advance application.

The tower also holds THE TOWER HOTEL NAGOYA, which its operators describe as the first hotel built inside a tower anywhere. Sleeping inside an Important Cultural Property is an unusual proposition.

From Sakae Station on the Higashiyama and Meijō subway lines, exits 3 or 4, the walk takes about three minutes. Hisaya-ōdōri Station on the Sakura-dōri and Meijō lines puts you at the base immediately from the south ticket gate and exit 4B. The tower stands in the middle of Hisaya Ōdōri Park, redeveloped as RAYARD Hisaya-odori Park, so the surrounding lawns and shops make an easy approach on foot.