This document summarizes the Japanese adtech market in 2014. It reports that the real-time bidding (RTB) market grew significantly and is projected to continue growing. Several of Japan's major demand-side platforms (DSPs) and supply-side platforms (SSPs) saw large increases in revenue and traffic. For example, MicroAd's revenue hit $68 million in 2013, while Voyage Group's adtech revenue doubled to $20 million in the third quarter of 2014. The document also discusses trends in data management platforms (DMPs), attribution tracking, and the growing importance of omni-channel retailing.