The tests included 3-second blarings of deer snorts and 20-second recordings of dog barks.
Japan set its national record in 2016 for trip suspensions and delays of at least 30 minutes because of animal collisions. There were 613 of those cases that year, 185 more than there were in 2015, The Telegraph reported.
The creators hope for a launch date no later than March 2019.
"We hope to finish it into a system that works in mountainous areas and elsewhere so railroad companies will want to introduce it," an official from the institute told The Asahi Shimbun.