Kiriko Tsujimori (Love interest)
Hajime was a self taught engineer who was sought out by the G-Graspers to join the self-defense force as a scientist to aid with their idea for a contained black hole to use as a weapon on Godzilla. He joins the team, and is present at the first successful test of the device three months later. He then develops a tracking device embedded in a bullet, which he gives to his teammate Kiriko Tsujimori. He is then seen working on "Dimension Tide", the satellite that will carry the device to space. When Tokyo is flooded, it is Hajime who suggests they use a Seek-Godzilla System (SGS) outfitted with an external camera, which the Graspers use to discover many Meganulon eggs. While the rest of the team works on this problem, Hajime creates a computer program to check Dimension Tide's systems, but the government uses the weapon before it the diagnostics are complete. When their attack on Godzilla fails, Tsujimori becomes angry at Hajime, who maintains that the weapon was not ready. They soon decide that Godzilla is heading to Tokyo where, after some words with some soldiers, Hajime determines that something magnetic under the floodwater is causing instruments and other technology to go haywire shortly before Megaguirus rises from the water. He destroys some buildings and Hajime wakes up in the hospital, where he describes what he saw and learns about Megaguirus from a scientist. He remains in the hospital until Dimension Tide stops responding, at which point he rushes to the control room to enter a debug code. At first it appears to work, but Hajime believes it is too late, as the satellite changes its orbit and begins to fall to earth. While he cannot correct this, he gets the weapon part back online. He then collaborates with Tsujimori to fire the weapon at Godzilla as it falls. It is Hajime who presses the button to fire the Dimension Tide to destroy Godzilla. At the end of the film he is shown to be back home doing what he did before he joined the Graspers, who seek him out again.