Chief Cabinet Secretary Yoshimasa Hayashi confirmed the flight cancellations, but airport operations resumed Thursday after overnight repairs. The airport, initially a Japanese Navy flight training field during WWII, has unearthed several bombs from that era.
The Self-Defense Forces and police are investigating the cause of the sudden detonation.
Japanese Defense Ministry officials noted that unexploded bombs from WWII remain a frequent issue in Japan, sometimes found during construction work.
AP
