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仁神術 is Jin Shin Jyutsu or Jin Shin Jutsu.
This is a practice of calming the mind and clearing the flow of Qi energy in the body. Jin Shin Jyutsu has some commonality with the practice of Reiki.
A good translation of 仁神術 would be “Benevolent Spirit Method.”
We can break that down into all of the possible meanings:
仁 = benevolence (esp. as a virtue of Confucianism), consideration, compassion, humanity, charity, kindness, or virtue.
神 = deity, soul, spirit, mysterious, psyche, god, divinity, spiritual powers, deva, divine, spiritual, or supernatural.
術 = way, method, means, art, trick, or plan. The correct romaji for this 術 Kanji should be “jutsu.” However, in martial arts, this is often written “jitsu” but in this case, “jyutsu” became common.