Otonal

Otonal is a Japanese digital audio advertising agency and audio production company based in Japan, serving advertisers, publishers, and corporate clients seeking to use sound-based media for marketing. The company specializes in digital audio ad planning and has delivered more than 4,500 audio advertising campaigns, supporting over 1,500 advertisers with ad placement and optimization across platforms such as Spotify, radiko, YouTube, and podcast networks.

The company's services span four main areas: marketing support for digital audio ad placement, creative production (audio commercials, CM songs, sound logos, and podcast production), audio ad-tech provision (including audio SSPs and ad servers), and data utilization support for publishers. Otonal operates its own podcast ad network, one of the largest in Japan, distributing ads across podcasts from radio stations, newspapers, publishers, TV stations, and influencers to platforms including Apple Podcasts, Spotify, Amazon Music, Google Home, and Amazon Alexa.

For corporate clients, Otonal provides end-to-end branded podcast production and distribution support, covering program planning, recording, hosting/CMS and ad-server systems, and marketing analytics. It also operates a podcast ranking data site used to inform content strategy. Clients referenced on the company's site include Adobe, Bell System24, Mazda, Yamaha Motor, Sumitomo Mitsui Card, and Shiseido Japan. The company recently brought FM BIRD into its group to strengthen its audio business.