共同ピーアール株式会社

Founded in 1964 and based in Chuo City, Tokyo, this firm operates as one of Japan's largest independent PR companies, publicly listed under securities code 2436. It maintains retainer contracts with more than 200 organizations, including major Japanese corporations, international companies, government offices, municipalities, and universities. Work draws on PR know-how accumulated since the company's founding, with client teams assembled from a pool of roughly 200 PR professionals matched to each account's needs.

Services span the full arc of communications work, from strategic consulting through hands-on execution. This includes media relations, digital PR, crisis and risk communications, corporate communications, and overseas PR support for clients operating internationally. Influencer and creator collaborations extend campaigns into social channels, while data engineering pipelines and AI/big data solutions support research and planning work. The firm positions this range as a single PR partnership model, covering both the planning stage and the outsourcing of day-to-day implementation.

Credentials reflect the scale of client relationships handled. The company was the first independent PR firm to obtain BS7799 certification, the international information security management standard, alongside Japan's domestic ISMS certification, addressing the confidentiality demands of corporate and government accounts. Headquarters staffing includes bilingual personnel in English and Chinese, supporting the firm's international and cross-border PR work. Together with its scale of retainer clients across corporate, public sector, and academic institutions, these certifications and language capabilities underpin its work on crisis communications and multinational accounts.