Number of influenza patients decreased for 2 consecutive weeks. 11.18 people per medical institution, a decrease of 2.9 people from the previous week.
By prefecture, the number of cases increased in 43 prefectures, including 25.8 people in Ehime Prefecture, 24.12 people in Niigata Prefecture and 21.54 people in Toyama Prefecture. "type B" influenza was the most common at 82% in the past five weeks, when analyzing the viruses detected.