The principle behind the Multi-Size Technique was to convert the fat stored in the body into special chakra, then enlarge a particular body part or the entire body.
If the Multi-Size Technique was used repeatedly, the body would unconsciously begin growing larger under the influence of chakra.
This fighting style did not suit Shihōin Naraku, so even though he had learned the Multi-Size Technique, he had never used it.
As for why the Akimichi Clan had taught Naraku their secret technique, passed down through generations-this was, after all, the crucial power that allowed the great ninja clans to perpetuate their lineages.
Naturally, it was because Naraku had helped the Akimichi Clan improve their secret medicine, greatly reducing its side effects and, most importantly, eliminating the risk of death.
Some ninja of the Akimichi Clan did not enjoy eating and drinking in huge quantities. Doing so over long periods was even painful, but the demands of combat required them to maintain their fat reserves and calories, which were the source of their strength.
Naraku had stepped in at the right time, developing a series of dietary therapy prescriptions that added more nutrients to food. From then on, the Akimichi Clan's ninja could sustain the tremendous energy their bodies required without eating and drinking excessively.
So it was hardly surprising that Naraku had learned the Multi-Size Technique. The only restriction was that he could not pass it on to outsiders without permission, which was only reasonable.
Through this, Naraku had established a very good relationship with the Akimichi Clan.
Naraku chatted with Choza and ate wild fruit. They had only just approached the Command Center when Shikaku handed him an intelligence scroll.
"This is a letter from the Land of Grass."
"So slow!"
Naraku muttered, then opened the scroll and quickly