Kagawa University, KDDI Research, NEC, and santec presented six papers at the international conference OFC 2023 held in San Diego (USA) from March 5 to 9 on asymmetric data traffic accommodating space division multiplexed optical networks, 6-mode 19-core real-time transmission, space division multiplexed networks with wavelength-switched dynamic bypass, FIFO-less multicore fiber optical repeater, history and prospects of submarine optical transmission, and core-selective switches based on LCPG and MEMS.