US-based Dobleas, a real-time mobile demand-side platform provider, has raised $5.4m in Series B funding from Tokyo-based FreakOut Inc.

Japan-based online advertising company FreakOut has led a series B round of undisclosed size into local mobile ad start-up Dobleas.

Dobleas raised $4m in a series A round last year.

Dobleas is a spin-off of FreakOut, the digital marketing technology company that created the first demand side platform (DSP) in Japan.

This month FreakOut raised Y500m ($5.3m) in its series B round from YJ Capital, the corporate venturing unit of local joint venture Yahoo Japa