The 9th International Symposium on Photonics and Electronics Convergence -Advanced Nanophotonics and Silicon Device Systems- (ISPEC 2019) was held at the Komaba Research Campus of the University of Tokyo on Tuesday 26 – Wednesday 27 November. It was a successful two-day conference with more than 240 participants, where the expectations of silicon photonics for 5G and AI were recognized. Session A on the first day, 26th, was positioned as the “18th Photonics Innovation (PI) Seminar” as a part of human resource development, and was open to graduate students and working engineers in the field of optics.