Mediahouse Holdings Inc. (Headquarters: Shinjuku-ku, Tokyo; President and CEO: Keisuke Hatouchi, hereinafter "the Company") is pleased to announce that it has entered into a business transfer agreement on February 13, 2026, to acquire the web advertising operations business conducted by WEBOSS Inc. (Headquarters: Chuo-ku, Sapporo, Hokkaido; Representative Director: Shinji Hayashibara, hereinafter "WEBOSS"), and that the business acquisition was completed on March 31, 2026. Through this acquisition, the Company will strengthen its marketing support system in the Hokkaido area and expand its business foundation towards the realization of its mission to "Energize Small and Medium-sized Enterprises Nationwide." Background and Purpose of Business Acquisition Mediahouse Holdings Inc., with its mission to "Energize Small and Medium-sized Enterprises Nationwide," operates a wide range of businesses nationwide, including marketing support, web advertising operations support, and human resource recruitment support. On the other hand, WEBOSS has been developing its web advertising operations business, primarily in the Hokkaido and Sapporo areas, and has an extensive track record in supporting the growth of local companies. Leveraging its knowledge gained from supporting over 300 industries, it has provided highly specialized internet advertising operations services. Furthermore, it has staff with Google Partners certification and strengths in operating Google Ads, Yahoo! Ads, and Meta Ads. Through this business acquisition, by integrating WEBOSS's customer base, sales channels, organization, human resources, and operational know-how with Mediahouse Holdings Inc.'s sales capabilities, marketing capabilities, and new business development capabilities, we aim to further strengthen our web marketing support system in the Hokkaido area and enhance the value provided to local companies. Synergies from This Transaction 1. Strengthening of Advertising Operations Business By integratin