Born in 1974. After developing new business and Web media in a publishing company, Shiroguchi joined Full Speed Inc.; an ad technology and marketing company. As an executive, he have supervised several departments such as sales department, media department, and SEO department and supported many digital media's promotion. He entered INFOBAHN Inc. in 2010. As a department head of the account consulting department and corporate officer, he specializes in planning company’s web marketing.