SustainableEnergy Co., Ltd. (Headquarters: Minato-ku, Tokyo; Representative Director: Shuichi Ajiifu) has begun displaying advertisements on handgrips on the Toei Subway (Shinjuku Line, Oedo Line, Mita Line) starting July 1, 2026, with the aim of expanding brand recognition for its electricity service, "Net Denryoku." This advertising campaign is part of the brand awareness enhancement measures for "Net Denryoku," which has been expanding its business since its service launch. The Toei Subway lines (Shinjuku Line, Oedo Line, Mita Line) where the advertisements will be displayed are major routes used in a wide range of situations, including commuting and attending school in the city center, as well as for business and daily life. Approximately 3 million people use these three lines daily, and we decided to place advertisements on this medium because it allows us to continuously deliver information within the daily flow of many people. By continuously delivering our brand message to many people, including corporate managers and office workers in the Tokyo metropolitan area, we aim to expand the recognition of "Net Denryoku" and further enhance its brand value. [Advertisement Display Overview] Display Period: July 1, 2026 - June 30, 2027 Display Area: Tokyo Display Lines: Toei Subway Shinjuku Line, Oedo Line, Mita Line Display Medium: Handgrip advertisements [Handgrip Advertisement Sample] Going forward, we will continue to provide better electricity services to our customers and contribute to reducing customer electricity costs and realizing a sustainable society through the development and provision of AI-powered services. We will also widely communicate our initiatives through various information disseminations. If you are using these lines, please take a look at the handgrip advertisements inside the trains. We appreciate your continued patronage.