The name "MASU" is derived from the polite form of Japanese, "~masu." First and foremost, it represents a brand that is respectful and meticulous. The concept is to re-examine things that are commonly used and already established, like polite language, and create a new style of men's clothing from there. It also carries the meaning of MASS PRODUCTION (mass-produced ready-made products), and the desire is for the garments to reach as many people as possible while maintaining the craftsmanship of one-of-a-kind pieces. Shinpei Goto was born on November 3, 1992. After graduating from Bunka Fashion College in 2014, he was involved in the planning and production of domestic brands from the Fall/Winter 2015-16 season to the Spring/Summer 2018 season. He officially launched his career as the designer of MASU with the Fall/Winter 2018 collection.
![[2025 Summer T-Shirts] 7 Trendy T-Shirts Selected by Men's Department Staff](https://ug7rtk3vglg3.global.ssl.fastly.net/images/empty.png)
3-14-1 Shinjuku, Shinjuku-ku, Tokyo TEL: 03-3352-1111
Hours: 10:00 AM - 8:00 PM
![ASICS SportStyle | New colors added to popular series! Pop-up store featuring exciting new products. [Isetan Shinjuku Store]](https://ug7rtk3vglg3.global.ssl.fastly.net/images/thumbnail/resize/214x142/images/upload/2026/09/21a6a42bd3b09193006e047f77a67274.jpg)
![A PRESSE | Pop-up store featuring a wide range of items from leather jackets and sweatshirts to beanies! [Isetan Shinjuku Store]](https://ug7rtk3vglg3.global.ssl.fastly.net/images/thumbnail/resize/214x142/images/upload/2026/09/404ccfb09df3649fd7e85cbfba7aa223.jpg)
![NICENESS is holding a POP UP event! The theme for their Fall/Winter 2026 collection is "Aesthetic Dissonance" [Isetan Shinjuku Store]](https://ug7rtk3vglg3.global.ssl.fastly.net/images/thumbnail/resize/214x142/images/upload/2026/09/febc8abd571506984d67dd5c05dd528d.jpg)
![[Updated September 28th (Monday)] PLAY COMME des GARÇONS | MARKET PLAY | Isetan Shinjuku Store](https://ug7rtk3vglg3.global.ssl.fastly.net/images/thumbnail/resize/214x142/images/upload/2026/09/00a0b96c84b31c89d629a795519bae27.jpg)
![[Updated August 31] Following last year's success, "VISVIM HARMONIOUS PROCESS," an event exploring VISVIM's manufacturing process, will be held again this year at Isetan Shinjuku Store.](https://ug7rtk3vglg3.global.ssl.fastly.net/images/thumbnail/resize/214x142/images/upload/2026/08/ae40b54be8eacb30f614b9487a949e73.jpg)
![Autumn/Winter 2026 Trends: Men's Coats & Outerwear Special Feature [Mitsukoshi Isetan Online Store]](https://ug7rtk3vglg3.global.ssl.fastly.net/images/thumbnail/resize/214x142/images/upload/2026/09/650c42b9f5dbd308bb372d1d276d27d1.jpg)
![[Updated September 1st (Tue)] AUTRY | Stray Kids' Changbin's capsule collection will be available for pre-sale at Isetan Shinjuku!](https://ug7rtk3vglg3.global.ssl.fastly.net/images/thumbnail/resize/214x142/images/upload/2026/08/f1f5a7138e3b23a7ffa30d0077801126.jpg)
![Bestselling Men's Jackets & Blousons for Fall/Winter 2026 [Mitsukoshi Isetan Online Store]](https://ug7rtk3vglg3.global.ssl.fastly.net/images/thumbnail/resize/214x142/images/upload/2026/09/5de50f07c968985d2d791f5d0b31734b.jpg)
3-14-1 Shinjuku, Shinjuku-ku, Tokyo TEL: 03-3352-1111
Hours: 10:00 AM - 8:00 PM
![ASICS SportStyle | New colors added to popular series! Pop-up store featuring exciting new products. [Isetan Shinjuku Store]](https://ug7rtk3vglg3.global.ssl.fastly.net/images/thumbnail/width/214/images/upload/2026/09/21a6a42bd3b09193006e047f77a67274.jpg)
![NICENESS is holding a POP UP event! The theme for their Fall/Winter 2026 collection is "Aesthetic Dissonance" [Isetan Shinjuku Store]](https://ug7rtk3vglg3.global.ssl.fastly.net/images/thumbnail/width/214/images/upload/2026/09/febc8abd571506984d67dd5c05dd528d.jpg)
![[Eyewear] Isetan Shinjuku Store is hosting the first-ever pop-up store in Japan for Moldism, a factory brand from Sabae. Numerous other Japanese-made eyewear brands will also be featured.](https://ug7rtk3vglg3.global.ssl.fastly.net/images/thumbnail/width/214/images/upload/2026/09/4422603000be11812913d008b2b65c39.jpg)
![100 Years of Eyewear Making in Sabae | Sasaki Presents a Wide Range of Eyewear in One Place! [Isetan Shinjuku Store]](https://ug7rtk3vglg3.global.ssl.fastly.net/images/thumbnail/width/214/images/upload/2026/09/78217d9002cf9f909d4ac973cdac1177.jpg)
![[Updated September 28th (Monday)] PLAY COMME des GARÇONS | MARKET PLAY | Isetan Shinjuku Store](https://ug7rtk3vglg3.global.ssl.fastly.net/images/thumbnail/width/214/images/upload/2026/09/00a0b96c84b31c89d629a795519bae27.jpg)
![Sanyo Coat | Pre-sale of collaborative items commemorating the 80th anniversary of the company! [Isetan Shinjuku Store]](https://ug7rtk3vglg3.global.ssl.fastly.net/images/thumbnail/width/214/images/upload/2026/09/e9556b6929f3d0eeb431bf585d664a16.jpg)
![Introducing Kirijang, a reversible jacket from Kiryu City, Gunma Prefecture, that fuses traditional crafts and art! [Isetan Shinjuku Store]](https://ug7rtk3vglg3.global.ssl.fastly.net/images/thumbnail/width/214/images/upload/2026/09/aacbe8c77409ade6600dec84b422b029.jpg)
Explore our serial articles that you'll want to read from the very first post!
The official Mitsukoshi Isetan online store offers popular items and limited-edition products unique to department stores. We also feature recommended men's content, including how-to articles and item showcases.
Interviews and recommended items!
At "PITTI IMMAGINE UOMO@ISETAN MEN'S," the annual classic fashion event held at Isetan Shinjuku Men's Building, the brand will also be featured in the men's shoe section on the first basement floor. The catalog published this season, "THE GENTLEMEN CLOTHI
Fashion questions and HOW-TOs!
Men's scarves (neckerchiefs and stoles) are particularly popular items during the transitional seasons of spring and autumn. Many people want to incorporate them into their outfits, but may be wondering, "What size should I choose?" or "How can I tie it t
Access
1 min walk from Tokyo Metro Marunouchi Line Shinjuku-sanchome Sta.
3 min walk from Toei Shinjuku Line Shinjuku-sanchome Sta.
5 min walk from JR Shinjuku Sta. / 7 min walk from Odakyu Line Shinjuku Sta.
7 min walk from Keio Line Shinjuku Sta.
5 min walk from Seibu Shinjuku Line Seibu-Shinjuku Sta.
10 min walk from Toei Oedo Line Shinjuku-nishiguchi Sta.
2 min walk from Tokyo Metro Fukutoshin Line Shinjuku-sanchome Sta.
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