New York City-based mobile ad startup Dobleas has emerged out of stealth with a $5.4 million investment from FreakOut, a Japanese digital marketing company.

Dobleas offers a “real-time mobile demand-side platform (DSP) provider with real-time data.” Ideally, its service will offer better data sources and more transparency to ad buyers and sellers who want to do business on mobile platforms.

FreakOut recently got a similar amount of cash from YJ Capital, the venture capital arm of Yahoo Japan. So FreakOut in turn decided to take YJ’s money and invest it in Dobleas, which was started and spun off by FreakOut President Yuzuru Honda, a serial entrepreneur.

“YJ Capital’s investment in FreakOut, in turn allowing our further investment in Dobleas, is validation of the company’s mobile technology and business model,” Honda said in a statement. “I have the utmost confidence in Dobleas’ executive team to bring value to the mobile advertising market and real-time mobile DSP solution.”

Photo via Dobleas