Kenji is told by his superior to accompany Takuya Fujita and Masako Tezuka on their journey to Infant Island. while there, the group discovers a Mothra egg and the Cosmos. He is ordered by his employer to take the egg back to Tokyo, where it would be used as a marketing tactic. on the ride back to Japan however, Godzilla appears and the egg begins to hatch. the larval Mothra tries to fight Godzilla, but it dragged the boat behind, leading to Fujita's felt need to let go of the eggshell's raft. Kenji was not fond of this plan, and fought with Fujita over this, but Kenji ultimately lost. Knowing that if he does not bring his boss something he will lose his job, Kenji kidnaps the Cosmos and gives them instead. His boss is overjoyed and plans to use them for marketing schemes, but first demands that Kenji go to a toy store to find them a place to live. Takehiro finds them a suitable lining space, but when he returns he finds them missing. They were stolen by Takuya Fujita, who planned to sell them on the black market before allowing them to save the world.
- The character Dr. Kenji Ando in the comic series Godzilla: Rulers of Earth is likely named after Kenji Andoh.