Why you should experience MIMARU Tokyo Shinjuku West in Tokyo, Japan.
MIMARU Tokyo Shinjuku West is a metropolitan apartment hotel where Nishi-Shinjuku's vertical architecture, metropolitan scale, residential edges and contemporary Japanese hospitality converge beyond the towers surrounding Tokyo's busiest railway district.
Set along Koshu Kaido near Juniso-dori and just steps from Shinjuku Central Park, the 14-storey property occupies Nishi-Shinjuku 3-chome where the skyscraper district begins dissolving into the smaller buildings and residential streets extending toward Hatsudai. Ataka Sekkei shaped the reinforced-concrete building across 4,181 square meters, using a narrow 491-square-meter site to create a distinctly vertical presence within the dense western Shinjuku streetscape. The building's February 2020 completion placed a purpose-built MIMARU property within the architectural territory created by Shinjuku's decades-long westward expansion, with the quieter scale surrounding the address creating a pronounced counterpoint to the towers immediately north. The result is a hotel where Ataka Sekkei, Nishi-Shinjuku and the 14-storey structure connect a compact urban site with the immense vertical city surrounding it.
What you should know about MIMARU Tokyo Shinjuku West.
MIMARU Tokyo Shinjuku West is best known for opening on March 26, 2020 as MIMARU's first property in the Shinjuku area, bringing Cosmos Initia's apartment-hotel concept into western Shinjuku only two years after the brand debuted with MIMARU Tokyo Ueno North in February 2018. The opening introduced 76 apartments within the purpose-built property as Cosmos Initia continued developing MIMARU under the Daiwa House Group, extending a portfolio created specifically around accommodating international families and groups underserved by conventional Japanese hotel formats. MIMARU had already received the 2018 Good Design Award and the 2019 Nikkei Superior Products and Services Award for Excellence before the Shinjuku property opened, giving the new hotel a brand concept that had acquired significant Japanese design and business recognition within its first two years. Cosmos Initia, Daiwa House Group, the February 2018 Ueno North debut, March 2020 Shinjuku opening, 76-apartment property and consecutive Good Design and Nikkei recognition place MIMARU Tokyo Shinjuku West within the formative period when MIMARU moved from a new accommodation experiment into an established Japanese hospitality brand.
Influencer Ayachan introduced a separate creative chapter at MIMARU Tokyo Shinjuku West in March 2022 by producing Lady Room specifically for the property, translating her social-media aesthetic into a physical hotel environment conceived around the atmosphere of spending time together in a fashionable café. Cosmos Hotel Management developed the collaboration into a named property-specific project launched on March 28, giving Ayachan creative authorship over a concept that extended MIMARU's group-stay philosophy into influencer-led interior storytelling two years after the hotel's debut. Japan Hotel REIT Investment Corporation subsequently acquired the property in July 2024 as part of a portfolio transaction, valuing MIMARU Tokyo Shinjuku West at ¥9.3 billion and identifying an appraised value of ¥9.59 billion while retaining Cosmos Initia as lessee. Together, Ayachan, Cosmos Hotel Management, Japan Hotel REIT Investment Corporation and Cosmos Initia trace the property from creative experimentation into institutional investment, showing how a hotel opened during MIMARU's formative expansion matured into a multibillion-yen hospitality asset within four years.
How to fold MIMARU Tokyo Shinjuku West into your trip.
MIMARU Tokyo Shinjuku West works as the anchor for an afternoon tracing metropolitan government, postwar skyscraper architecture and Japanese photographic culture across western Shinjuku.
Begin at Tokyo Metropolitan Government Building, where Kenzo Tange designed the twin-towered complex completed in 1991, extending ideas from his earlier 1957 Tokyo Metropolitan Government headquarters into a vast granite-clad composition that became one of the defining works of Japan's late twentieth-century public architecture. Continue to Mode Gakuen Cocoon Tower, where Tange Associates won an international competition for the project before completing the 204-meter educational tower in 2008, wrapping three schools within a cocoon-shaped diagrid that earned Emporis Skyscraper of the Year. Conclude at Tokyo Photographic Art Museum, established by the Tokyo Metropolitan Government as Japan's first comprehensive museum devoted to photography and moving images, opening its current Ebisu building in 1995 and developing a collection spanning Japanese photographic history and international image culture. The progression moves from Kenzo Tange's metropolitan architecture through Tange Associates' twenty-first-century tower into Tokyo's institutional commitment to photographic culture, revealing the design ambition surrounding MIMARU Tokyo Shinjuku West beyond its immediate streets.
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