Influenza alerts in Japan by prefecture

地図の色
沖縄県

Prefectures with an advisory or warning (32)

Okinawa Warning2026-10-02
Ibaraki Advisoryweek 38
Aomori Advisory2026-10-16 · Higashi-Tsugaru/Aomori City, Seihoku and Kamikita health-centre areas
Ehime Advisory2026-10-16
Hokkaido Advisory2026-10-15
Yamagata Advisory2026-10-15
Yamanashi Advisory2026-10-15 · Chuhoku, Fuji-Tobu and Kofu City health-centre areas
Kyoto Advisory2026-10-15
Hyogo Advisory2026-10-15
Tokushima Advisory2026-10-15 · Tokushima and Miyoshi health-centre areas
Fukuoka Advisory2026-10-15
Iwate Advisory2026-10-14
Fukushima Advisory2026-10-14
Yamaguchi Advisory2026-10-14
Oita Advisory2026-10-14
Shizuoka Advisory2026-10-09
Tochigi Advisory2026-10-08
Hiroshima Advisory2026-10-08
Nagasaki Advisory2026-10-08
Kumamoto Advisory2026-10-08
Kagoshima Advisory2026-10-08
Ishikawa Advisory2026-10-07
Gunma Advisory2026-10-06
Gifu Advisory2026-10-01
Kanagawa Advisory2026-09-28
Niigata Advisory2026-09-28
Aichi Advisory2026-09-28
Okayama Advisory2026-09-28
Saitama Advisory2026-09-25
Chiba Advisory2026-09-25
Toyama Advisory2026-09-25
Tokyo Advisory2026-09-17

Each prefecture in Japan decides for itself when to announce an influenza advisory or warning. This map shows the alerts the prefectures actually announced, with the date and a link to each announcement, together with the weekly number of cases per sentinel clinic from the Japan Institute for Health Security (JIHS). Japan's national "influenza level map" has been suspended since spring 2025.

更新履歴