An Air Self-Defense Force aircraft strayed off a runway and came to a halt at Niigata Airport at around 11:50 a.m. Friday.
None of the five crew members aboard the U-125A search and rescue aircraft was in a life-threatening condition, ASDF officials said.
The airport's two runways were closed after the incident. One of them reopened about 45 minutes later.
The ASDF is looking into what led to the incident.
The aircraft belongs to the rescue unit of the ASDF Niigata branch base, located adjacent to the airport. The incident occurred after a training mission.
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