| 1969-08 |
Established Daiichi Clinical Testing Center Co., Ltd. in Sapporo City, Kita Ward, with capital of 1.3 million yen for commissioned clinical testing. |
| 1981-11 |
Participated in Daiichi Clinical Testing Center Co., Ltd., established in Asahikawa, Hokkaido. |
| 1988-03 |
Merged Daiichi Clinical Testing Center Co., Ltd. (Asahikawa City). |
| 1988-10 |
Relocated headquarters to Higashiku, Sapporo City. |
| 1989-05 |
Merged Otani Co., Ltd. and succeeded in drugstore business. Adopted a departmental system with clinical testing business as the Diagnostics Division and sales business as the Retail Division (later Merchandising Division, now Retail Business). |
| 1989-05 |
Absorbed and merged with Ota Co., Ltd., inheriting its drugstores. Adopted a divisional structure with the clinical testing business as the Diagnostics Division and the sales business as the Retail Division (later the Merchandise Division, now Retail Division). |
| 1993-05 |
Opened Daiichi Pharmacy (now Ain Pharmacy Toyooka Store) in Asahikawa, Hokkaido, entering the pharmacy business. |
| 1994-03 |
Listed shares on the Japan Securities Dealers Association. Capital increased to 1,281,800,000 yen. |
| 1994-05 |
Unified pharmacy name to "Ain Pharmacy." |
| 1994-06 |
Established subsidiary Ain Medical Systems Co., Ltd. (now Ain Pharmacies Co., Ltd.) in Shinjuku, Tokyo. |
| 1995-05 |
Separated pharmacy business from Merchandising Division (now Retail Business) and established Medical Business Division (now Pharmacy Business). |
| 1995-05 |
Separated the pharmacy business from the Merchandise Division (now Retail Division) and established the Pharmaceutical Division (now Pharmacy Division). |
| 1996-10 |
Unified drugstore store names to "Ainz." |
| 1998-10 |
Transferred all clinical testing business to Daiichi Clinical Testing Center Sapporo Laboratory. |
| 1998-11 |
Changed company name to Ain Pharmacies Co., Ltd. |
| 1999-02 |
Entered a business and capital alliance regarding pharmacy business among Marubeni Corporation, Ain Medical Systems Co., Ltd. (now Ain Pharmacies Co., Ltd.), and others. |
| 1999-03 |
Conducted a third-party allotment of additional shares to Marubeni Corporation. Capital increased to 1,499,300,000 yen. |
| 1999-10 |
Conducted a third-party allotment of additional shares. Capital increased to 2,819,300,000 yen. |
| 2002-10 |
Ain Medical Systems Co., Ltd. (now AIN Pharmacies Co., Ltd.) was listed on the Japan Securities Dealers Association. Opened a new type of cosmetics & drugstore "Ainz & Torupe Basement Street Store" in Chuo Ward, Sapporo City. |
| 2003-07 |
Opened "Ain Pharmacy Chibana Branch" in Okinawa City, Okinawa Prefecture. |
| 2004-01 |
Transferred the operation of drugstores in the Kanto area to consolidate the business into cosmetics & drugstores. |
| 2004-09 |
Made Medwell Inc., which sells consulting related to medical care and information magazines, a subsidiary (consolidated subsidiary from the fiscal year ending April 2007). |
| 2006-04 |
Established Wholesale Stars Inc. (a consolidated subsidiary) and started wholesale of generic pharmaceuticals. |
| 2007-01 |
Made Daichiku Co., Ltd. (now Ain Hokuriku Co., Ltd.) a subsidiary. |
| 2007-06 |
Made Asahi Dispensing Co., Ltd. (now Ain Chuo Co., Ltd.) a subsidiary. |
| 2008-06 |
Made the company a wholly owned subsidiary through share exchange with Ain Medical Systems Co., Ltd. (now Ain Pharmacies Co., Ltd.). |
| 2008-08 |
Entered into a business alliance and capital alliance agreement with Seven & I Holdings Co., Ltd. |
| 2009-04 |
Listed on the Second Section of the Tokyo Stock Exchange. |
| 2009-06 |
Established Seven Healthcare Co., Ltd. through joint investment with Seven & I Holdings Co., Ltd., Ito-Yokado Co., Ltd., and Seven-Eleven Japan Co., Ltd. |
| 2009-06 |
Established the drugstore operator "Seven Healthcare Co., Ltd." through joint investment with Seven & i Holdings Co., Ltd., Ito-Yokado Co., Ltd., and Seven-Eleven Japan Co., Ltd. |
| 2010-04 |
Designated on the First Section of the Tokyo Stock Exchange. |
| 2010-05 |
Listed on the Sapporo Securities Exchange. |
| 2013-11 |
Relocated headquarters to Shiroishi Ward, Sapporo City. |
| 2015-09 |
Made Ayuara Laboratories Inc. a subsidiary. |
| 2015-11 |
Changed the company name to AIN Holdings Co., Ltd. due to transition to a holding company structure, and inherited rights and obligations related to business divisions to the consolidated subsidiary Ain Pharmacies Co., Ltd. |
| 2017-10 |
Conducted public offering and third-party allotment of shares. Capital stock became 21,849,497,000 yen. |
| 2020-03 |
Entered into a business alliance agreement with Shidax Corporation, and made its subsidiary Shidax Ai Co., Ltd. (now Ain Pharmacies Co., Ltd.) a subsidiary. |
| 2022-04 |
Transitioned from the First Section to the Prime Market due to review of market classification by the Tokyo Stock Exchange. |
| 2022-04 |
Transitioned from the First Section to the Prime Market following a review of market classifications by the Tokyo Stock Exchange. |
| 2022-05 |
Made Pharmacies Holdings Co., Ltd. (now Pharmacies Co., Ltd.) a subsidiary. |
| 2024-08 |
Made Francfranc Co., Ltd. a subsidiary. |
| 2025-04 |
Acquired A&M Co., Ltd. as a subsidiary. |
