10 fatalities

Fatal aircraft accident near Sapporo-Okadama Airport (JA5162)

Mt Kumaneshiriyama, JapanLanding (descent or approach)

On May 30, 1972, a Cessna 402 (registration JA5162) operated by Yokohama Koku Company was involved in an aviation accident near Mt Kumaneshiriyama, Japan during landing or approach. 10 people were killed. Investigators recorded the probable cause as: The aircraft struck a mountainside while flying in poor weather conditions during its approach to the airport. This summary draws on records from the Bureau of Aircraft Accidents Archives (B3A).

Sourcesthe Bureau of Aircraft Accidents Archives (B3A)Primary reportUpdated 2026-06-12Data APIEditorial standards

A twin-engine airplane crashed into a mountainside during its approach to Sapporo-Okadama Airport, resulting in no survivors.

What happened

During an approach to Sapporo-Okadama Airport, a twin engine airplane impacted the terrain at Mt Kumaneshiriyama. The collision occurred approximately 47 km northeast of the destination airport. At the time of the accident, the area was experiencing unfavorable weather conditions.

The impact resulted in the total destruction of the aircraft. There were 10 fatalities among the occupants, with no survivors reported from the crash site.

Findings

  • The flight was operating in poor weather conditions during the approach phase.
  • The aircraft struck a mountain slope located roughly 47 km from its intended destination.

Probable cause

The aircraft struck a mountainside while flying in poor weather conditions during its approach to the airport.