What architectural feature in Japan was designed to mimic the bird's call as a security measure?

Answer

The *ugisubari* (nightingale floor)

The *ugisubari* is a type of floor designed to squeak, mimicking the sound of the *uguisu*, serving as a silent warning system against intruders in buildings.

What architectural feature in Japan was designed to mimic the bird's call as a security measure?
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