The D-03 Missile (Ｄ―０３ 削岩弾?, lit. D-03 Rock Drilling Bullets) is a rocket weapon which is attached to the D―03 Sakugan-danSatsuma submarine and loaded in the Taihos in Godzilla, Mothra and King Ghidorah: Giant Monsters All-Out Attack.
After an Earthquake on Mount Myoko caused a massive rockfall, two D-03 Missiles were fired into the mass of rock from the cannon of a Taiho, in an effort to facilitate the search for survivors. The Taiho then entered the tunnels created by the missile, where the crew found a single survivor. They then caught a glimpse of Baragon digging his way through the hillside, being responsible for the earlier tremors.
Much later, the D-03 Missile was used once more in an attempt to drill into Godzilla's body, having been fired from a fleet of Taihos. Despite causing minor injury, the missiles failed to break through Godzilla's thick hide, and Godzilla destroyed the fleets of infantry and the missile launchers in response.
During the final battle in Tokyo Bay, The Satsuma is launched with the missiles in its payload. After Godzilla defeated King Ghidorah, the guardian beast's energy merged with that of Mothra and Baragon and acted to slow the nuclear behemoth down, causing him to sink beneath the waves. Taizo, the sub's captain, pilots the Satsuma towards Godzilla, but Godzilla eats the Satsuma without a second thought. As Taizo loses hope, Yuri's spirit gives him the will to continue, and he fires the missile at Godzilla's throat, cutting a hole straight through it from the inside out. As the Satsuma escapes through the hole, Godzilla tries to blast the submarine with his atomic breath, but the beam simply escapes through his gaping wound. Eventually, the pressure in Godzilla's body rises to the point that he violently explodes, reducing his body to just his beating heart.