Integrating Environment-Specialized Recruitment Service "Eco-Riku" to Maximize HR Solutions in the Sustainability Sector

Massmedian, Inc. (Headquarters: Minato-ku, Tokyo; Representative Director: Hideaki Sakai; hereinafter "Massmedian"), a group company of Sendenkaigi, Inc. that provides specialized recruitment support, announces that it has merged with its subsidiary, Grace, Inc. (Headquarters: Chiyoda-ku, Tokyo; hereinafter "Grace"), effective March 31, 2026.

### ■ Background and Purpose of the Merger: Accelerating "Green Talent" Support Through Organizational Integration Massmedian has long supported the business growth of numerous companies by matching specialized talent in the advertising, marketing, and public relations sectors. Additionally, the company operates "Green Job Career," a recruitment service focused on the environmental sector, and has been concentrating on talent placement in the fields of environment, GX (Green Transformation), ESG, and sustainability. Meanwhile, Grace has operated "Eco-Riku" (https://ecoriku.jp/), a recruitment service specialized in the environmental field, for 30 years, building a network of "green talent" with high-level professional expertise.

In recent years, securing specialized talent has become an urgent issue for companies promoting GX. Through this organizational integration, we will fully combine the recruitment expertise and environmental specialization of both companies to accelerate decision-making and enhance the quality of our services.

### ■ Post-Merger Development: Strengthening an End-to-End Support System Through this merger, Massmedian will establish its position as one of Japan's largest HR platforms in the environment and sustainability sector.

Furthermore, we will continue to work closely with "Kankyo Business" (Environmental Business), a specialized media outlet under Sendenkaigi, Inc.—which, like Massmedian, is a wholly-owned subsidiary of KAIGI, Inc. By combining the media's latest industry insights, Sendenkaigi's education and training resources, and our integrated talent database, we will further solidify a unique system that provides end-to-end support, from the "nurturing and education" of environmental talent to "recruitment support" and "information provision."

The "Eco-Riku" brand, previously operated by Grace, will continue as a Massmedian service, and we remain committed to providing further value to both users and hiring companies.

### ■ Merger Overview Merger Date (Effective Date): March 31, 2026

Merger Method: An absorption-type merger with Massmedian, Inc. as the surviving company and Grace, Inc. as the dissolved company.

Company Name After Merger: Massmedian, Inc. (Grace's business will continue as a business unit within Massmedian).

### ■ Company Overviews (Pre-Merger)

**[Massmedian, Inc.]** Representative Director: Hideaki Sakai Address: 9F, Shin-Aoyama Tokyu Building, 3-11-13 Minami-Aoyama, Minato-ku, Tokyo Business Description: Recruitment and hiring consulting specialized in marketing, creative, digital, and public relations fields. URL: https://www.massmedian.co.jp/

**[Grace, Inc.]** Business Description: Operation of "Eco-Riku," a recruitment service for the environment and sustainability sector. URL: https://ecoriku.jp/ (Service site)

**[Sendenkaigi, Inc. (Affiliated Company)]** Publishing business ("Sendenkaigi," "Kankyo Business," etc.), education and training business. "Kankyo Business" URL: https://www.kankyo-business.jp/

**[KAIGI, Inc. (Holding Company)]** Acts as a holding company overseeing business entities such as Sendenkaigi and Massmedian, providing overall management and supervision.