Akira Ajisaka is a software engineer working at NTT DATA, Japan. He belongs to OSS Professional Services team and deploys and operates Hadoop clusters for customers. He sometimes troubleshoots them by investigating source code and creating patches to fix the problem. He is an Apache Hadoop committer and PMC member, and he involves in various components of Hadoop for improving usability and supportability. He wrote a blog post about activities of the development of Apache Hadoop.