DESIGNWORKS Vol.18

14/36

12345678N城南ビルディングJohnan Building都市の変遷を転写するファサードA façade that reflects the history of the area東京・神田の本社ビル兼テナントビル。東京・大手町の巨大ビル群から、下町情緒あるヒューマンスケールな街並みに変節する角地に位置する。隣接する鎌倉橋が江戸城築城時、石材を運んだ河岸であったことに因み、江戸城の基調である漆黒と純白のコントラストをテーマとし、品格のある端正な佇まいを、素材の質感を大切に構成した。整形でフレキシブルな平面計画は、小規模ながら高効率で様々なニーズに対応する。環境との接点を重視し、建物全体に自然光・風を積極的に採り入れた。永続的な貸しやすさをテーマとし、快適な執務環境に細心の配慮を行い、近接する地下鉄振動音対策を行うなど、小規模な都心立地を最大限に活かしている。緑化された屋上はアメニティ空間として開放され、東京の多様な風景を見晴らすことができる。(井上 聡子)This is a combined head office and tenant building in Tokyo's Kanda district. It is located on a corner site in the area that marks a transition from the group of enormous high-rise buildings in Otemachi to a more human-scale area with a working-class appeal. The Kamakura Bridge nearby was once located on the bank of a river that was used to transport stone for the construction of Edo Castle. Accordingly, the contrast between jet-black and pure white that was the motif for Edo Castle has been used as the theme of this building, creating a simple, refined appearance that emphasizes the texture of the materials. The well-designed flexible floor plan is small but highly efficient and can accommodate a variety of needs. The design emphasizes contact with the environment, and an active effort has been made to introduce natural lighting and breezes throughout the building. Great care has been taken to create a comfortable work environment, with the emphasis on ensuring the ease of long-term leasing. Measures such as reducing noise and vibration from the nearby subway have been introduced to take maximum advantage of the small site's central location. The open green rooftop environment enhances the building's appeal and affords great views of the diverse scenery of central Tokyo. (Satoko Inoue)角地に向けた勾配で街並みの光をとりこむ天井10BASIC FLOOR PLAN S=1:600建築主:城南興業株式会社所在地:東京都千代田区主要用途:オフィス・一部本社オフィス設計施工:竹中工務店・設計:廣島正明・鈴木重則・井上聡子・構造:村田耕司・大嶋隆・北川督・設備:福井康雄・桑形航也・作業所長:菅原文明敷地面積:260.12㎡建築面積:229.99㎡延床面積:1,868.74㎡構造:S造階数:地上9階工期:2009.2〜2010.2Owner: JOHNAN KOGYO Co., Ltd.Location: Chiyoda-ku, TokyoMain use: OfficeDesign and construction work: Takenaka Corporation･Architects: Masaaki Hiroshima, Shigenori Suzuki, and Satoko Inoue･Structual: Koji Murata, Takashi Ohshima, and Osamu Kitagawa･M&E: Yasuo Fukui, Koya Kuwagata･Site manager: Fumiaki SugawaraSite area: 260.12㎡Building area: 229.99㎡Total floor area: 1,868.74㎡Construction: SteelNumber of stories: 9 floors above groundConstruction term: February 2009 to February 20101. 事務室 Office2. EVホール EV hall3. 女子トイレ WWC4. 男子トイレ MWC5. パントリー Pantry6. リフレッシュバルコニー Refresh balcony7. 屋外避難階段 Outside evacuation stairs8. 避難バルコニー Fire escape balcony12Works