Integrating Environment-Specialized Recruitment 'Ecoriku' to Maximize HR Solutions in the Sustainability Field

Massmedian Co., Ltd. (Headquarters: Minato-ku, Tokyo; President: Hideaki Sakai; hereinafter 'Massmedian'), a group company of Sendenkaigi Co., Ltd. specializing in professional recruitment support, announces that it merged with its subsidiary Grace Co., Ltd. (Headquarters: Chiyoda-ku, Tokyo; hereinafter 'Grace') as of March 31, 2026.

### Background and Purpose: Accelerating 'Green Talent' Support through Integration Massmedian has supported business growth by matching specialized talent in advertising, marketing, and PR. It also operates 'Green Job Career,' focusing on recruitment in Environment, GX (Green Transformation), ESG, and Sustainability. Meanwhile, Grace has operated 'Ecoriku' (https://ecoriku.jp/), an environment-specialized recruitment service, for 30 years, building a network of highly specialized 'Green Talent.'

Securing professional talent has become an urgent issue for corporate GX initiatives. Through this integration, we will fuse recruitment expertise with environmental specialization to speed up decision-making and enhance service quality.

### Future Outlook: Strengthening the End-to-End Support System This merger establishes Massmedian as one of Japan's largest HR platforms in the environment and sustainability sectors.

We will continue to collaborate closely with 'Kankyo Business' (Environmental Business), a specialized media outlet from Sendenkaigi (a fellow subsidiary of KAIGI Co., Ltd.). By combining the media's industry insights, Sendenkaigi's educational resources, and the integrated talent database, we will strengthen our unique system that provides everything from 'Nurturing/Education' to 'Recruitment Support' and 'Information Provision' for environmental talent.

The 'Ecoriku' brand will continue as a service of Massmedian, striving to provide even greater value to users and hiring companies.

### Merger Overview - Merger Date (Effective Date): March 31, 2026 - Merger Method: Absorption merger with Massmedian as the surviving company and Grace as the vanishing company. - Post-Merger Name: Massmedian Co., Ltd. (Grace's business continues as a division within Massmedian)

### Company Overview (Before Merger) **[Massmedian Co., Ltd.]** President: Hideaki Sakai Location: 9F Shin-Aoyama Tokyu Building, 3-11-13 Minami-Aoyama, Minato-ku, Tokyo Business: Recruitment and consulting specialized in Marketing, Creative, Digital, and PR fields.