Giant Electrode

The Giant Electrodes 巨大電極板, (Kyodai denkyoku-ban) are a pair of electricity-releasing devices which first appeared in the 1971  film Godzilla vs. Hedorah.

Godzilla vs. Hedorah
As it became clear that Godzilla was losing the battle against Hedorah in the countryside, the J.S.D.F. decided to launch a last-ditch attempt at fighting the monster themselves. The two massive electrodes were set at either end of the field where the were fighting each other, and power was applied to them. Godzilla grabbed Hedorah and managed to pull him towards the electrodes, but the devices shorted out. In an act of quick-thinking, Godzilla recharged the electrodes by firing his Atomic Breath at them, repairing them as well. Hedorah, now severely dehydrated from the electrodes' relentless charges, tried to flee in his flight form, but Godzilla famously flew off after him, and brought him down to the ground, once again pulling him towards the electrodes. After a few more minutes of Godzilla using his Atomic Breath to dry out Hedorah in conjunction with the electrodes, the King of the Monsters was finally victorious.