Community-based Social Contribution Activities

SUMCO’s Chitose Plant has been working to maintain a pleasant road environment for pedestrians by implementing a clean-up program on approximately 1.5 km of sidewalks along the main roads of the Chitose Industrial Complex where the plant is located. Plant members pick up empty cans and trash that have been discarded, as well as fallen leaves and other refuse.

SUMCO’s JSQ Division (Akita Prefecture) participates every year in the “Omono River Cleanup Campaign” organized by Akita City, together with local residents and neighboring companies.

In addition to cleanup activities along the major arterial roads in the industrial park as a member of the “Hachimanpara Corporate Council” made up of companies in the industrial park, SUMCO's Yonezawa Plant also participates in conservation and maintenance activities such as forest thinning and fertilization in Zusayama, Bansei-cho, Yonezawa City, which is located near the plant. The forest management in Zusayama is being carried out through the "Yamagata Bond Forest" agreement between SUMCO, Yamagata Prefecture and the local territorial group, Zusayama Ward Assembly.

SUMCO’s Kyushu Factory supported the conservation activities of the horseshoe crab, the endangered species Class I, which inhabits the Makishima area of Imari City, Saga Prefecture. Conservation activities are being conducted at the “Imari Bay horseshoe crab breeding area,” which was designated a national natural monument in 2015, and continue to protect this precious biological resource that is in danger of extinction.

At the Miyazaki Plant of SUMCO TECHXIV Corporation, as part of our biodiversity conservation efforts, we plant broadleaf trees and other species every year in Tsubakiyama Forest Park, engaging in activities to conserve native plant species.

SUMCO Technology Corporation takes part in cleanup operations four times a year along nearby municipal roads and sidewalks, and also engages in cleanup activities within the industrial park where its plant is located. Furthermore, SUMCO Technology Corporation participates annually in the Edogawa Clean Campaign, held every May and organized by the Edogawa River Office of the Ministry of Land, Infrastructure, Transport and Tourism and 13 other municipalities around Noda City, as a member of the Southern Plant Liaison Council. The activities include collecting discarded cans and bottles, etc. and performing cleanup activities on the riverbed, embankments and side ditches along the Edogawa River.

At High-Purity Silicon Corporation, the Suzuka Manufacturing Division located in the Amana area of Suzuka City participates in the annual community beautification activity "Clean Town Amana" held every June. In 2025, 33 employees participated.

SUMCO Taiwan Technology Corporation conducted a coastal cleanup activity at Hsinchu City Kanhai Park under the guidance of the Hsinchu City Government Environmental Protection Bureau in November 2025.

SUMCO Phoenix Corporation (USA) regularly conducts community cleaning activities called "Litter Patrol." Litter Patrol is an initiative that employees voluntarily conduct patrols around the factory premises and collect trash, with many employees participating each time.

At the Chitose Plant, in June each year, we enter the "Flower-Filled Contest" hosted by Chitose City's greening promotion foundation (Chitose Environment and Greenery Foundation) and plant colorful flowers in the green belt on roads around the plant, aiming environmental beautification.

SUMCO TECHXIV Corporation’s Miyazaki Plant participates every year in the “Tsubaki Community Festival,” a community event held at Tsubakiyama Forest Park in February. The Festival provides local residents with opportunities to appreciate the beauty of the forest park. In addition, through the distribution of flower seedlings, the Festival has local residents cherish plants, and renew their awareness of the importance of environmental conservation.

At the SUMCO Support Corporation^*, we conduct "Flower Project" activities, including the voluntary creation of flower beds and the planting of flower seedlings grown from seeds, at our Kyushu Factory and the SUMCO Nursery School Imari. These efforts bring joy to visitors, employees in the surrounding areas of the company, and nursery school children.

At the Nagasaki Plant of SUMCO TECHXIV Corporation, we have organized an external rescue team, and joint rescue drills under the guidance of members of the Omura Fire Department are conducted to prepare the team for fire disasters at nearby welfare institutions.