DNX Ventures, an investment firm that focuses on early-stage B2B startups in Japan and the United States, announced today that it has closed a new $315 million fund. This is DNX’s third flagship fund; along with supplementary annexed funds, this brings its total managed so far to $567 million. Founded in 2011, with offices in San Mateo, California and Tokyo, Japan, DNX has invested in more than 100 startups to date, and has 13 exits under its belt.