Sekisui Chemical Group has begun its own Green Forest Forestry-preservation Activities as one effort toward preventing global warming and preserving biodiversity. These are intended to prevent forests from losing their primary functions in areas such as absorbing CO₂ from the atmosphere and protecting biodiversity, as the number of forests left uncared-for increases across Japan.
For example, in Gunma Prefecture approximately 1,000 employees in total work at the five business sites of Sekisui Chemical's Gunma Plant and Woods Promotion Division, Sekisui Board Co., Ltd., Gunma Sekisui Heim Co., Ltd., and Toto Sekisui Co., Ltd. Sekisui Board Co., Ltd. and Toto Sekisui Co., Ltd. use lumber as a raw material in the products they produce.
Protecting and nurturing forestry, which is a valuable resource in Gunma Prefecture, also is important from the point of view of building a sustainable society. For this reason, in March 2008 these five sites together concluded an agreement for forestry preservation and improvement (arranged by Toto Sekisui) with the village of Takayama in Gunma Prefecture, to improve 9.2 hectares of forest owned by the village. In April 2008, representatives of these five sites installed a sign identifying the forest as Sekisui Shiki no Mori, as a symbol of these activities, and took part in a commemorative planting ceremony. In addition to monitoring the site, the participants discussed about future activities. A large number of employees will continue to support forestry activities in their local areas across Japan in the future.

Sekisui Chemical Group is carrying out forestry conservation activities in cooperation with local communities, under the title Green Forest Activities. In March 2009, the Group carried out its first overseas forestry activity, at Yuping Mountain in the city of Suzhou, China. A total of 75 persons, including employees of affiliate companies located in southern China and their families, took part, planting 500 trees from 10 varieties of native seedlings. This activity will help beautify the mountain landscape.