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  4. Hario Radio Towers
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Hario Radio Towers

By Lettuce in the Lattice - Own work, CC BY-SA 4.0

Hario Radio Towers

針尾無線塔

Nagasaki · Kyushu

Three towering 136m reinforced-concrete radio masts completed by the former Imperial Japanese Navy in 1922, standing on Hario Island between Sasebo and Omura bays. Designated a National Important Cultural Property, they are said to have relayed the coded signal that preceded the attack on Pearl Harbor.

Why it's hidden

This monumental piece of early-20th-century engineering sits away from tour routes and is barely known outside local history buffs, yet the grounds are freely open to wander beneath the giants.

Best season
Year-round
Crowd level
Hidden gem
Opening hours
Seasonal — see below

Usual hours — confirm with the official site for holidays + seasonal closures.

Admission
Exterior viewing and volunteer-guided tower interior tours are free; visits by reservation.
Nearest station
Huis Ten Bosch Station

Today

Free

Note

  • Grounds viewable anytime; volunteer guide hut and No.3 tower interior generally 9:00-15:00 (weekends/holidays)

Tags

historyarchitecturetowers

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