1979‒1996 Founding Period
- 1979-1996
- 1997-2013
- 2014-2018
- 2019-2022
- 2023-2025
- 2025-Present
Founding Period
Daiei Kankyo group was founded in 1979 in Izumi City, Osaka Prefecture, by Kazumasa Shimoji, Fumio Kaneko and two others. In the following year, we obtained disposal permits from Osaka Prefecture for nine types of waste, and opened a controlled final disposal site approximately 650,000 m3 in volume. After that, we expanded our business, and made capital investments while shifting toward recycling, laying the foundation of the group.
1979
Daiei Kankyo Co., Ltd. was established in Izumi City, Osaka Prefecture
Our journey began from a final disposal site. At that time, it was thought to be impossible to obtain a permit due to stiff opposition from the local community. However, we made persistent, good faith efforts to explain the need for a site, and eventually acquired the necessary permits.

1980
Daiei Kankyo Co., Ltd. opened controlled final disposal site in Izumi City, Osaka Prefecture
1983
Kazumasa Shimoji (our company's founder) acquired the shares of Mie Chuo Kaihatsu Co., Ltd.
1984
Mie Chuo Kaihatsu Co., Ltd. opened controlled final disposal site in Ueno City (now Iga City), Mie Prefecture
1986
Daiei Kankyo Co., Ltd. opened Nishinomiya Recycle Center
Daiei Kankyo Co., Ltd. opened a refuse-derived fuel (RDF) production facility, the start of our intermediate treatment and recycling business, in Nishinomiya City, Hyogo Prefecture. Facility started operations.

1987
Takehiro Kaihatsu Co., Ltd. (merged with Mie Chuo Kaihatsu Co., Ltd. in August 1997) opened controlled final disposal site
1989
Mie Chuo Kaihatsu Co., Ltd. opened Mie Recycle Center in Ueno City (now Iga City), Mie Prefecture
1990
Takehiro Kaihatsu Co., Ltd. opened Kyoto Recycle Center in Soraku-gun, Kamo Town (now Kizugawa City), Kyoto Prefecture
1991
Daiei Kankyo Co., Ltd. opened Miki Recycle Center in Miki City, Hyogo Prefecture
1994
Daiei Kankyo Co., Ltd. opened controlled final disposal site in Miki City, Hyogo Prefecture

1995
The Great Hanshin Awaji Earthquake
The Great Hanshin Awaji Earthquake brought about major changes in our group's foundation. In order to treat the large amount of disaster waste, we introduced large plant equipment from overseas, and accelerated treatment during waste separation. We treated about a third of all the earthquake waste.
Dec.Settsu Co., Ltd. was acquired as a subsidiary
Dec.Settsu Seiun Co., Ltd. was acquired as a subsidiary

1996
Infinity Farm Ueno, an agricultural cooperative corporation, was established (currently: Negibozu Agricultural Producers' Cooperative Corporation)
Jul.Compost Japan Co., Ltd. was established (merged with Mie Chuo Kaihatsu Co., Ltd. in August 2015)

