Heiga Zen received his AE from Suzuka National College of Technology, Suzuka, Japan, in 1999, and PhD from the Nagoya Institute of Technology, Nagoya, Japan, in 2006. He was an Intern/Co-Op researcher at the IBM T.J. Watson Research Center, Yorktown Heights, NY (2004--2005), and a Research Engineer at Toshiba Research Europe Ltd. Cambridge Research Laboratory, Cambridge, UK (2008--2011). At Google, he was in the Speech team from July 2011 to July 2018, then joined the Brain team from August 2018. His research interests include speech technology and machine learning. He was one of the original authors and the first maintainer of the HMM-based speech synthesis system (HTS).