| 1998-12 |
Started building a panel membership organization centered on the Tokyu Den-en-toshi Line and began operating an information community site (D style web). |
| 2001-12 |
Established Maru-shu Ltd. in Tamagawa-dai, Setagaya-ku, Tokyo. |
| 2001-12 |
Launched panel recruiting service. |
| 2004-04 |
Reorganized from Maru-shu Ltd. to Maru-shu Co., Ltd. |
| 2005-04 |
Joined the Japan Marketing Research Association as a regular member. |
| 2006-02 |
Moved headquarters to Sangenjaya, Setagaya-ku, Tokyo. |
| 2006-02 |
Obtained Privacy Mark (registration number 12390094). |
| 2011-10 |
Moved headquarters to Komazawa, Setagaya-ku, Tokyo. |
| 2014-01 |
Moved headquarters to Shibuya, Shibuya-ku, Tokyo. |
| 2014-01 |
Opened Hachinohe office. |
| 2016-05 |
Started offline research service. |
| 2016-09 |
Opened Osaka office. |
| 2017-07 |
Opened Fukuoka office. |
| 2018-11 |
Changed company name to Asmark Co., Ltd. |
| 2018-11 |
Moved headquarters to Higashi, Shibuya-ku, Tokyo. |
| 2018-12 |
Started operating the foreigner-specialized panel site 'e-gaikokujin Recruiting' and expanded research services targeting foreign residents in Japan. |
| 2019-06 |
Obtained product certification standard ISO 20252 for market research (market, public opinion, social surveys) services. |
| 2019-11 |
Relocated the Osaka office to Naimonohoncho, Chuo-ku, Osaka Prefecture. |
| 2019-11 |
Relocated the Hachinohe office to Mikamacho, Hachinohe City, Aomori Prefecture. |
| 2020-06 |
Released the employee engagement service Humap. |
| 2020-09 |
Released the original interview system 'i-PORT voice'. |
| 2021-12 |
Opened the Yokohama office. |
| 2022-01 |
Listed shares on the Tokyo Stock Exchange's TOKYO PRO Market. |
| 2022-09 |
Released the original chat interview tool 'i-PORT chat'. |
| 2022-12 |
Opened the Nagaoka office. |
| 2023-10 |
Opened the Nakameguro office. |
| 2023-12 |
Listed shares on the Tokyo Stock Exchange's Standard Market. |
| 2024-08 |
Opened the Nagoya office. |
| 2024-09 |
Entered into a capital and business alliance with Skill Bridge Co., Ltd. |
| 2024-12 |
Acquired shares of Sales Promotion Research Institute Co., Ltd. (made it a subsidiary). |
| 2026-01 |
Acquired shares of Lean Nishikata Co., Ltd. (made it a subsidiary). |
| 2026-03 |
Obtained a patent for an AI-driven fully automated marketing research platform. |
