No, the Japanese never landed on or invaded Bathurst Island.
Bathurst was, however, the first place to be attacked by the
Japanese in an airbourne assault before the bombing of Darwin.
Father John McGrath, head of the missionary on Bathurst island,
sent radio signals to Darwin warning of the oncoming onslaught of
Japanese fighter planes from his signal station next to the church
as they flew overhead. The Japanese machine gunned the church and
signal station from the air and dropped a bomb on an aircraft in
Bathurst Island airfield. They then continued on to Darwin, bombing
the city and harbour.