Taiyo Kisokogyo Co., Ltd. is a construction company primarily engaged in special engineering works. The Company operates in three business segments. The Special Civil Engineering Works and Others segment is engaged in the provision of special civil engineering works, and the soil decontamination environmental business. The Housing-related Works segment is engaged in the provision of housing ground improvement works and housing correction works, and the solar power generation and other environmental businesses. The Machinery Manufacturing and Sales segment is engaged in the manufacture and sale of construction machinery.