Jun Hayasaka was a Japanese child who was constantly moving due to his father being transferred at his job. While taking his bug collection to a friend's house, Jun came across the test site of the "Dimension Tide". He watches the test and is discovered by the G-Graspers who tell him to keep the test a secret. That night he sees a Meganula fly by his window and he goes into the woods to investigate it. In the woods he finds a Meganulon egg, which he takes home with him. He is seen again after moving to Tokyo, where he finds the box with the egg in it is very wet. he then disposes of the egg in a storm drain. After the Meganulon hatches he contacts the Graspers and explains the situation. They affirm that it's not his fault. He then tells them what the creatures are, based on a science book he had. He is not seen for the rest of the film, save for a scene showing him and his mother fleeing the city with the rest of the citizens and a post-credits scene in which he gasps as Godzilla's roar plays.