Interbeing Raises 50 Million Yen from Kakuchi for Voice Analysis
The deal makes a 140-year-old regional sales company both the investor and the test site, giving Interbeing a live sales floor to prove that non-verbal voice cues can show how a pitch was received.
Reporting from 1 source: ASCII.jp.
Interbeing, the Kyoto startup behind the Polyphony Sales voice analysis service, raised about 50 million yen through a third-party allotment to Kakuchi, a Nagano company founded in 1886. The two signed a business collaboration agreement in July 2026. Kakuchi becomes investor, customer, and implementation partner, and its sales floor will be the site where Interbeing verifies how voice reveals whether a pitch landed.
Interbeing's engine extracts more than 700 acoustic features from speech and calculates 35 psychological and emotional indicators, including emotion, motivation, stress, and metacognition. It does not transcribe or depend on what is said, a design the company says suits multiple languages. The analysis model was rebuilt in 2023 and 2024, moving from supervised learning toward an approach inspired by bioacoustics and bird song research that treats humans as a species rather than a cultural group.
The company cites one case in which a young manufacturing sales rep raised closing rate from 15 percent to 22 percent over three months. In HR work, employees flagged by voice as potentially unwell showed relatively higher rates of leaving or absence, and a burnout indicator correlated with the MBI scale at r=0.76. Kakuchi's information systems department built the operational app in-house.
Synthesized by Yomimono from the 1 cited source below, including Japanese-language reporting where cited, then editorially reviewed before publishing.