Nijo Castle — Shogun's Nightingale Floor Palace

Nijo Castle (二条城) served as the Kyoto residence of Tokugawa shoguns from 1603–1867, representing the military government's power in the imperial capital. The castle is famous for its 'nightingale floors' (鶯張り, uguisubari) — wooden corridors designed to chirp when walked upon, alerting guards to intruders. The squeaking is caused by nails rubbing against clamps beneath the floorboards.

The Ninomaru Palace interior features 3,000+ painted wall panels by the Kano school depicting tigers, leopards, and nature scenes — some of Japan's finest examples of Momoyama-period art. The castle gardens combine pond-stroll style with borrowed scenery of the Higashiyama mountains.