With the help of his sensei, Azuresato Ryu an infamous kunoichi and medical-ninja, Isamu was able to become proficient in medical ninjutsu. Teaching him how to properly control his chakra and schooling him about human anatomy, Ryu had helped Isamu create this technique. Pumping large doses of blood into all the muscles of his all over his body, Isamu is able to manipulate and amplify his muscles to such a great degree that they were not able to be contained by his skin. When the technique is active, enhanced muscle fibers protrude from Isamu's skin and cover his limbs. The improved muscles give Isamu very enhanced strength and speed. This technique raises physical strength to the point that, when seriously using his power, he can obliterate a large chunk of a cliffside with a single strike. By manipulating the muscles in his legs, Isamu can move at blurring speeds. The muscles also provide Isamu with a high level of protection. The fibers can act as a shield to absorb attacks. This technique is to be praised as one of the strongest medical ninjutsu in the word. With the teachings of Azuresato Ryu, it was not surprising her student would master such a technique.