US-based user experience optimisation platform Kaizen Platform has raised $8m in a series B round backed by a raft of corporate investors.
The new investors in the round were YJ Capital, NTT Docomo Ventures and Saison Ventures, the respective corporate venturing subsidiaries of internet company Yahoo Japan, mobile network NTT Docomo and payment services firm Credit Saison, as well as mobile game developer Colopl.
GMO Venture Partners, the corporate venturing arm of internet company GMO; Gree Ventures, which fulfils the same function for digital media firm Gree; and Eight Roads Ventures Japan, a subsidiary of investment group Fidelity International, participated as returning investors.
Kaizen operates an online platform that enables brands, agencies and freelancers to collaborate on the creation and testing of ad interfaces.
GMO, Gree and internet company CyberAgent provided $800,000 in seed funding for Kaizen in 2013 before Gree Ventures and Eight Roads, then called Fidelity Growth Partners Asia, invested $5m the following year.
Gree Ventures and Fidelity Growth Partners Asia subsequently added another $4m in funding for Kaizen in April 2015.