The 12th Asia-Pacific Laser Symposium (APLS) will be held in Hakodate, Hokkaido, Japan. The new date of this conference is 4-7 September 2023. It will be an in-person meeting. APLS has been held bi-annually in Japan, Korea, and China for academic discussions and information exchanges on laser science and technology among scientists, engineers, and students since 1998. This APLS is sponsored by the Laser Society of Japan, the Optical Society of Korea, and the Chinese Optical Society. It will cover most aspects of laser science and technology from sources to applications, including the following, but not limited to, research topics listed here.