Eiji Shinohara introduces himself as an AWS Solutions Architect who focuses on the AdTech and startup markets. He provides details about the AWS Japan AdTech team members who support the advertising industry. Shinohara highlights several Japanese AdTech companies that are using AWS, including Opt, Dynalyst, fluct, Intimate Merger, and UNICORN. He encourages attendees to use the #AWSAdTechJP hashtag when posting about Japanese AdTech on AWS and invites people to the upcoming re:Invent conference.