Tranche Update on Taisei Corporation's Equity Buyback Plan announced on May 12, 2023.

Taisei Corporation is one of the Japanese largest building and civil engineering works groups. Net sales break down by activity as follows: - construction of infrastructures and buildings (90.7%): roads, highways, bridges, tunnels, dams, hospitals, airports, office buildings, homes, leisure centers, etc.; - promotion and real estate assets management (8.6%); - other (0.7%).