Tosei Corporation (Head Office: Minato-ku, Tokyo, President and CEO: Seiichiro Yamaguchi, Securities Code: 8923) participated in Tokyo "Sato-Umi" Aid in Nishinagisa cleanup activities in Kasai Marine Park.

Tokyo "Sato-Umi" Aid in Nishinagisa is an event organized by "DEXTE-K" to collect drifted wastes from Kyu-Edogawa River and Arakawa River for the purpose of conserving the biodiversity of Nishinagisa, an artificial tideland in Kasai Marine Park. We have participated in this event every year since 2017, and 53 employees of our group and their family members volunteered to participate this year.
After a briefing by the organizers on the biodiversity and the damage caused by trash in the Kasai Marine Park area, the volunteers cleaned up the area for about one and a half hours, collecting six bags (about 270 liters) of trash, including plastic debris and PET bottles as well as oversize trash such as refrigerators and plastic tubs.

We have positioned "natural environment conservation" as one of the priority areas of our social contribution activities.
Through these activities, we will strive to raise awareness of social issues such as waste reduction and marine resource conservation, and contribute to the conservation of the precious natural environment in the city center.