| 1953 |
Organized a personal store selling kimono in Ogawa Town, Saitama Prefecture, into a corporation, established as Shimamura Kimono Store Co., Ltd. |
| 1953 |
Expanded product handling to include ready-to-wear clothing and fabrics, which were rapidly increasing in consumption at the time, in addition to kimono. |
| 1957 |
Aimed to be a general apparel mass retailer, introduced a self-service system. |
| 1961 |
Opened the Higashimatsuyama store as the second store, and shifted the main business to this store, adopting chain theory, with concentrated procurement of products and separation of procurement and sales operations. |
| 1970 |
Established Higashimatsuyama Shopping Center and relocated the Higashimatsuyama store and headquarters functions within the center. |
| 1972 |
Changed the company name from Shimamura Kimono Store Co., Ltd. to Shimamura Co., Ltd. |
| 1975 |
Started comprehensive internal computerization based on product management, developed in-house. |
| 1975 |
Started operation of dedicated flights through charter contracts aiming to streamline logistics. |
| 1981 |
Database management of product inventory, connecting all stores online, and starting single-item management with 7-digit POS system (manual input). |
| 1982 |
Expanded sales base from Saitama and Gunma Prefectures to the entire Kanto region, and relocated headquarters to Miyahara-cho, Kita-ku, Saitama City to cope with increased business volume. |
| 1984 |
The number of stores increased to 50 with the opening of Shimamura Oizumi store in Oizumi Town, Gunma Prefecture. |
| 1984 |
Constructed a logistics center in Kawaguchi City to integrate and concentrate goods and information, reformed night-time regular deliveries to stores, abolished invoice procurement, and significantly streamlined delivery inspection operations. |
| 1986 |
Started M employee system, operating all stores except store managers with regular employees through standardization and rationalization of store operations. |
| 1987 |
Introduced barcode price tags to further improve POS system accuracy, and shifted to a barcode-based management system that handles all processes from inspection to sales through scanning. |
| 1988 |
The number of stores increased to 100 with the opening of Shimamura Takanezawa store in Takanezawa Town, Tochigi Prefecture. |
| 1988 |
Built a product center in Saitama City for a 250-store system, relocating from Kawaguchi Logistics Center. |
| 1988 |
Completed a logistics system that further consolidates goods and information. |
| 1988 |
Expanded business to Fukushima Prefecture and began advancing into the Tohoku region. |
| 1988 |
Listed on the Second Section of the Tokyo Stock Exchange. |
| 1990 |
Expanded store openings mainly on suburban roadside locations aiming for nationwide expansion since the 1990s. |
| 1991 |
Designated as a stock of the First Section of the Tokyo Stock Exchange. |
| 1991 |
Expanded to Okayama Prefecture and began advancing into the Chugoku and Shikoku regions. |
| 1993 |
Aiming for nationwide store expansion, built and started operating the Fukushima Product Center in Fukushima City as a logistics hub for the Tohoku area, focusing on labor-saving and high-speed operations. |
| 1994 |
Constructed and started operating Okayama Product Center in Kurashiki City as a logistics hub for the Chugoku and Shikoku regions. |
| 1994 |
The number of stores increased to 300 with the opening of Shimamura Obanazawa store in Obanazawa City, Yamagata Prefecture. |
| 1994 |
Constructed and started operating Inuyama Product Center in Inuyama City as a logistics hub for the Chubu and Kinki regions. |
| 1996 |
Established a subsidiary, Avail Co., Ltd., handling young casual wear. |
| 1997 |
Established a subsidiary, Dream Luck Co., Ltd., in Taoyuan City, Taiwan. |
| 1997 |
Opened 1st and 2nd stores of Avail in Tatebayashi City, Gunma Prefecture, and Honjo City, Saitama Prefecture. |
| 1997 |
Expanded to Fukuoka Prefecture. Began expansion into Kyushu region. |
| 1997 |
The number of stores reached 500 with the opening of Shimamura Yamaga Store in Yamaga City, Kumamoto Prefecture. |
| 1998 |
Constructed a headquarters building in Kita Ward, Saitama City, as part of business expansion and efficiency improvement within the Shimamura Group. |
| 1998 |
Opened the first store of Sumu Raku in Pingzhen City. |
| 1999 |
Replaced Omiya Product Center with a new product center in Okegawa City, supporting a 400-store system, with high-speed processing and automation across four centers, operating a comprehensive logistics system. |
| 2000 |
Started opening stores in commercial facilities from the early 2000s. |
| 2000 |
Since 2000, launched the Birthday and Chambre businesses, and opened fashion malls combining various businesses of the Shimamura Group. |
| 2000 |
Established and began operation of Kitakyushu Product Center in Kitakyushu City as a logistics hub for Kyushu area. |
| 2000 |
Opened the first Chambrel store in Isesaki City, Gunma Prefecture, handling women's fashion accessories. |
| 2000 |
Opened the first Birthday store in Omitama City, Ibaraki Prefecture, handling baby and children's products. |
| 2000 |
Constructed and began operation of Morioka Product Center in Morioka City as a logistics hub for Hokkaido and North Tohoku regions. |
| 2000 |
Built Nishi-Ōmiya Fashion Mall in Saitama City. Started constructing stores in open mall format, including Avail and Birthday, moving away from standalone stores. |
| 2000 |
Since the early 2000s, also advancing store openings at commercial facilities. |
| 2000 |
Started Birthday and Chambure businesses. |
| 2000 |
Open fashion malls. |
| 2002 |
Launched a store brand aimed at clarifying product policies, initiated direct logistics for total distribution rationalization, introduced Web-EDI to improve order and delivery accuracy, and began building mechanisms for a new corporate structure. |
| 2002 |
Completed expansion to all 47 prefectures with the opening of Shimamura Nago Store in Nago City, Okinawa Prefecture, and increased store count to 800 with the opening of Shimamura Otsu Store in Otsu Town, Kumamoto Prefecture. |
| 2003 |
Constructed and began operation of Sekigahara Product Center in Tarui Town, Gifu Prefecture, to strengthen logistics functions in Chubu and Kinki regions. |
| 2003 |
Achieved 1,000 stores as Shimamura Group with the opening of Shimamura Champiport Store in Nagoya City, Aichi Prefecture. |
| 2003 |
Achieved 100 stores with the opening of Avail Hanamaki Store in Hanamaki City, Iwate Prefecture. |
| 2006 |
Achieved 1,000 stores as Fashion Center Shimamura with the opening of Shimamura Viva Mall Kazo Store in Kazo City, Saitama Prefecture. |
| 2007 |
Constructed and began operation of Hadano Product Center in Hadano City, Kanagawa Prefecture, to optimize total distribution and promote direct logistics. |
| 2007 |
Entered the city center by opening Shimamura Takadanobaba Store within Yamanote Line. |
| 2007 |
Achieved 200 stores as Avail with the opening of Avail Wakkanai Store in Wakkanai City, Hokkaido. |
| 2008 |
Achieved 1,500 stores as Shimamura Group with the opening of Shimamura Naoho Store in Naoho City, Fukuoka Prefecture. |
| 2015 |
Achieved 2,000 stores as Shimamura Group with the opening of Shimamura Viva Mall Nagoya Minami Store in Nagoya City, Aichi Prefecture. |
| 2020 |
Open the directly operated EC site "Shimamura Online Store". |
| 2021 |
Pursuing further business expansion and efficient operation as Shimamura Group, completed a new head office building in Saitama Shintoshin and relocated the headquarters. |
| 2024 |
Published the first integrated report for the Shimamura Group. |
| 2025 |
Opened the direct sales EC site |
| 2025 |
Integrated the Shimamura Group's online store and added a new Divaro business to the directly managed EC site |
