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23tr tiPhoogaphy｜１： 伊藤彰［アイフォト］／Akira Ito [aifoo]｜2–5：古川泰造／Tazo Furukawa13大ホール客席Grand hall seating大ホール舞台Grand hall stage1 : 大ホール（2,010席）。音楽コンサート中心の多目的ホール。Box in Boxの防振遮音を採用し、NC-20、残響時間1.9sを実現。音響反射板を含めて、すべて煉瓦内装としている。2 : 大ホールホワイエ。星空のような天井と円弧状のスラブが積層するダイナミックな空間。3 : 大ホールホワイエ。煉瓦壁面を照らす象徴的なトップライト。4 : 中ホール（693席）。演劇中心の多目的ホール。赤い煉瓦で3次曲面を形成し音を攪拌。 吊り下げ式の音響反射板あり。5 : 小ホール（164席）。市民利用が最も多いコンパクトなホール。1 : Grand hall (seating capacity: 2,010). The multipurpose hall designed mainly for musical concerts. The interior is entirely sound-reflecting brick and the walls are equipped with anti-vibration and soundproofing technology.｜2 : Grand hall foyer. The arched slab and ceiling designed to resemble a starry sky are layered in this dynamic space.｜3 : Grand hall foyer.｜4 : Medium hall (seating capacity: 693). The red bricks of the interior walls are dynamically configured to intensify sound, and sound reflectors are suspended from above.｜5 : Small hall (seating capacity: 164). The compact hall most frequently used for citizen activities. Three State-of-the-Art Multipurpose Halls with All-Brick InteriorsThe all-brick, sound-reflecting interior of the three-tiered, 2,010-seat grand hall has acoustic panel running along its walls to better distribute early reflected sound to the audience and the stage. The anti-vibration and sound-absorbing struc-ture ensures that the floor, ceiling, and walls are insulated from the structural frame, enabling a high degree of sound-proofing that makes the hall suitable for musical concerts in addition to various other events. The spherical bead-filled downlights on the ceiling create the illusion of stars sparkling in the night sky. Lights with three different degrees of color temperature and three different sizes—a total of nine different types in all—are scattered across the ceiling to recreate the starry sky of October, when Himeji Castle, a UNESCO World 大ホール断面図｜Grand hall section, scale 1:800Heritage Site, was completed in 1609. The medium hall is a multipurpose venue especially suitable for theatrical performances. Its fan-shaped seating arrangement allows for easy viewing of the stage and is designed to immerse audience members in the performances. The interior brick walls are twisted in three dimensions to intensify reflected sound, creating a uniform acoustic environment across the seats. The small hall, which also has anti-vibration and soundproofing construction, is frequently used by local citizens, particularly for events such as small concerts. Each of its four walls leans outward by five degrees for better sound intensification. We hope local citizens will embrace this building, and that its distinct small, medium and grand halls will help it fulfill its role as a hub for cultural events from all over the world.