The Himeji Castle Main Keep, known in Japanese as dai-tenshu or tenshukaku, is the heart and most recognizable symbol of the famous castle complex in Himeji, Japan. This majestic wooden structure, rising from a stone base, reaches a total height of 46.3 meters (the tower itself is 31.5 meters). Its five-tiered (seven-story, including basements) construction with dazzling white walls is an outstanding example of Japanese castle architecture, harmoniously combining elegance with powerful defensive functions.

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Himeji Castle, of which the Main Keep is an integral part, is considered one of Japan's largest and best-preserved castles from the Edo period. Its uniqueness lies in the fact that it escaped destruction from disasters, preserving its original appearance for centuries. This makes it an invaluable historical monument and a popular tourist destination.
The Main Keep does not stand alone—it is surrounded by three smaller towers connected to it by covered walkways. Together, they form an impressive and harmonious architectural ensemble. Due to its historical and cultural significance, the Himeji Castle Main Keep, along with the entire castle complex, is designated as a National Treasure of Japan and is included in the UNESCO World Heritage list, attracting tourists from all over the world with its beauty and rich history.