| 1892 |
Founded a funeral goods store under the name Tamano-ya in Fukushima City, Fukushima Prefecture |
| 1892 |
The Kokoro Net Group was founded in 1892 (Meiji 25) by a company engaged in wedding and funeral services |
| 1892 |
The Kokoro Net Group was founded in 1892 (Meiji 25) as a wedding and funeral service company. |
| 1929 |
Similarly, a stone materials business company was founded in 1929 (Showa 4) |
| 1929 |
In 1929 (Showa 4), a stone materials business was established. |
| 1929-10 |
Founded Kanno Stone Materials in Kakeda Town, Date District, Fukushima Prefecture (now Date City, Fukushima Prefecture) |
| 2005 |
In 2005, the wedding and funeral services company and the stone materials company merged to form the Kokoro Net Group |
| 2005 |
In 2005, the wedding and funeral service company and the stone materials company merged and was born. |
| 2005-11 |
The 'Kanno Group' in the stone materials business and the 'Aituai Group' in the wedding and funeral services business merged through a stock exchange to start new activities as the 'Kokoro Net Group' |
| 2005-11 |
The stone materials business 'Kanno Group' and the wedding and funeral services business 'Aituai Group' merged through share exchange |
| 2006-04 |
|
| 2006-04 |
Establishment of Kokoro Net Group |
| 2007-04 |
Kanno Trading Co., Ltd. absorbed Kanno Stone Product Inspection Co., Ltd. and Hakutaka Plywood Manufacturing Co., Ltd. |
| 2007-04 |
Kanno Trading Corporation absorbed Ishino Kanno Product Inspection Limited Company. Kanno Trading Corporation absorbed Hakutaka Plywood Manufacturing Limited Company (Yamagata Prefecture, Nishiokitama District, Shirotaka Town) which was engaged in sales of decorative products |
| 2009-04 |
Kokoro Net Corporation absorbed Toyo Stone Materials Center Co., Ltd. and transferred the business to Kanno Stone Co., Ltd., which in turn absorbed Rinrin Hill Co., Ltd. |
| 2009-04 |
Kokoro Net Corporation absorbed Toyo Stone Center Corporation (Nagano Prefecture, Tomi City), which was engaged in stone retail business, and transferred that business to Ishino Kanno Corporation. Ishino Kanno Corporation absorbed Rinrin Hill Corporation |
| 2012-04 |
Kokoro Net Corporation listed its shares on the Osaka Securities Exchange JASDAQ (Standard) market. |
| 2012-04 |
Kokoro Net Corporation listed its shares on Osaka Securities Exchange JASDAQ (now Tokyo Stock Exchange Standard Market) |
| 2013-04 |
Carried out a share exchange with Koriyama Grand Hotel Co., Ltd., adding two subsidiaries to the group. Established Kokoro Garden Co., Ltd. to enter the nursing care business. |
| 2013-04 |
Koriyama Grand Hotel Corporation (Fukushima Prefecture, Koriyama City) conducted a share exchange with Kokoro Net Corporation, and its subsidiaries (Gojyo System Circle Corporation, Kawashima Corporation) joined the group |
| 2014-04 |
Kokoro Net Corporation absorbed Kawa Kishi and Koriyama Grand Hotel Co., Ltd. absorbed Sunstone Co., Ltd., changing its trade name to With Wedding Co., Ltd. |
| 2015-07 |
Ushiku Funeral Company transferred all shares to Kokoro Net Corporation and joined the group. |
| 2016-07 |
Heart Line Co., Ltd. absorbed Mutual Aid System Circle Co., Ltd. |
| 2017-04 |
Kanno Trading Co., Ltd. split off its stone wholesale business and transferred it to Kanno Stone Co., Ltd. After the split, Kanno Trading Co., Ltd. changed its name to Fleur Co., Ltd., and Kanno Stone Co., Ltd. changed its name to Kanno Trading Co., Ltd. |
| 2017-06 |
Established Kokoro e-Power Co., Ltd. to enter the renewable energy business. |
| 2017-09 |
Tamano-ya Co., Ltd. absorbed Ushiku Funeral Company. |
| 2017-12 |
Tamabashi Limited transferred all shares to Kokoro Net Corporation and joined the group. |
| 2017-12 |
Tamahashi Limited Company (Fukushima Prefecture, Motomiya City) transferred all shares to Kokoro Net Corporation and joined the group |
| 2018-12 |
Kita Kanto Mutual Aid Center Co., Ltd. transferred all shares to Kokoro Net Corporation and joined the group. |
| 2018-12 |
Kita-Kanto Mutual Aid Center Corporation (Tochigi Prefecture, Utsunomiya City) transferred all shares to Kokoro Net Corporation and joined the group |
| 2019-04 |
Tamano-ya Corporation merged with Tamahashi Limited Company |
| 2020-02 |
Kanno Trading Vietnam Limited Company transferred its shares to Kokoro Net Corporation and joined the group |
| 2020-02 |
Kanno Trading Vietnam Limited Company (Ho Chi Minh City, Vietnam) transferred its shares to Kokoro Net Inc. and joined the group |
| 2021-01 |
Kokoro Garden Corporation transferred all of its caregiving business to another company |
| 2021-07 |
Kokoro Net Corporation absorbed Kokoro Garden Corporation |
| 2021-10 |
Kokoro Net Inc. absorbed Kokoro e Power Inc. |
| 2022-04 |
Due to a review of the market classification by the Tokyo Stock Exchange, it transitioned from JASDAQ (Standard) to the Standard Market |
| 2023-09 |
Kizukido Holdings Corporation transferred all shares to Kokoro Net Corporation, and three subsidiaries joined the group |
| 2024-02 |
Kizukido Holdings Corporation absorbed Seleo Corporation, Shiki Corporation, and Kizukido Limited Company, and changed its trade name to Kizukido Seleo Corporation |
| 2026 |
In 2026, became part of the Sun Holdings Group listed on the Tokyo Stock Exchange Prime Market |
| 2026 |
In 2026, it will become a member of the San Holdings Group listed on the Tokyo Stock Exchange Prime Market. |
| 2026-02 |
Management integration through share exchange with Sun Holdings Corporation. Became a wholly owned subsidiary of the Sun Holdings Group and delisted from the Tokyo Stock Exchange Standard Market |
