I'm a researcher at Preferred Networks. I'm working on research and development of deep learning. My previous research topic was to develop efficient algorithms for real-world large-scale networks such as social networks and web graphs. In particular, my main interest is to grasp useful properties of real-world networks and exploit them to design efficient algorithms. I was an addict of programming contests such as ACM-ICPC, TopCoder and Google Code Jam. My maximum TopCoder rating is 3292, which was 4th in the world.