Japanese air safety experts recommended adding more traffic controllers and safety alerts at airports after a deadly runway collision at Tokyo's Haneda.
The measures suggested by the transport ministry-appointed panel were published on Monday. The January 2 accident at Haneda killed five after a Japan Airlines jet landed and crashed into a Japan Coast Guard aircraft on the runway.
The experts said additional air traffic controllers are needed to help coordinate takeoffs and landings.
New controllers will start working at eight main airports in Japan, including New Chitose, Haneda, Narita and Kansai before the summer travel season.
Lamps that will warn pilots when other aircraft or vehicles are on the runway will also be introduced at these airports. Audible alarms will be added to screens that monitor aircraft locations.
Investigators have said the pilot of the Coast Guard aircraft involved in the Haneda accident may have misinterpreted the air traffic control phrase "number one" as clearance for takeoff. The phrase is used to tell planes they are next in line to take off.
The ministry ordered personnel to stop using the phrase after the accident. But it will be reintroduced by the end of July because of requests from controllers.