The Mutual Multiplication of Explosives Seals is a technique that is part of a fighting style deliberately designed for those who have been reincarnated, and employs the use of explosive special stamps to create an almost endless series of explosions. Using his own body as a means to the paper, the reincarnated individual creates several explosive seals formed from large sheets that carry each of five seals. These special stamps, then join the intended target. Once they detonate, they invoke additional postage which in turn create more stamps also exploding. This process is repeated continuously, which leads to a reaction almost infinite string of consecutive bursts. To sacrifice themselves, this technique can also be used by a living individual. 
Depending on how it is written, "Gojo" can have several meanings:
As 五常 refers to the five Confucian virtues Cardinals (justice, education, wisdom, loyalty and benevolence).
As 五 情 refers to the five passions (anger, joy, hatred, desire and pain).
As 互 譲, it means "conciliation, compromise."
In Naruto Shippūden: Ultimate Ninja Storm 4 Tobirama uses this technique in conjunction with the water release, holding the opponent in the massive arrest of water and then destroying it with the explosion of explosives seals.