The 7th International Symposium on Photonics and Electronics Convergence – Advanced Nanophotonics and Silicon Device Systems – (ISPEC2017) was successfully held at Komaba Research Campus on December 11 and 12. The symposium welcomed leading researchers in this field from Japan and abroad, and we were able to deepen active discussions on the latest research results and future issues in silicon photonics. The two plenary lectures on the morning of the first day were positioned as the 11th Photonics Innovation (PI) Seminar, which was held jointly with NEDO and was open to students and young engineers.