Japanese media on December 15 initially reported on the Ito mayoral election results, with Ken'ya Sugimoto winning and incumbent Maki Takubo losing. This followed the previous day's focus on the election. Concurrently, severe blizzards and heavy snow in Hokkaido caused widespread power outages, flight cancellations, and transportation disruptions, becoming an increasingly dominant story throughout the day. By the early morning, reports shifted to an arrest in a Fukuoka stabbing incident, where a 30-year-old man was apprehended on suspicion of attempted murder. Later, the re-arrest of a 37-year-old man for a dangerous driving incident in Tokyo's Adachi Ward, which caused 14 casualties, gained prominence. Other notable developments included the Japanese Society of Anthropology's apology for collecting Ainu remains and the return of twin pandas from Ueno Zoo to China.