During Sept. 20~23, 2023, the 6th workshop, entitled 2023 International Joint Workshop on Intelligent IoT Key Technology, was held in Nanjing city, China. This is the first time members from the China, Japan and Korea could gather on-site for face-to-face communication. We have 5 keynotes and 10 oral presentation sessions. The topics ranges from wireless sensing and communication to IoT and smart home applications. From our team, we sent 13 attendees and two students, Wenhao Huang and Taiga Kume presented their work on machine learning driven sensing technology. In addition to the academic events, we also learned a lot about Nanjing city’s history and culture. A very great trip! See you next time, Nanjing.