Muso Tensei

Musō Tensei
Name
無(む)想(そう)転生(てんせい)
Kanji	無想転生
Romaji	Musō Tensei
English	Nil-Thought Rebirth Enlightened Transmigration (Legends of the Dark King) Unconscious Transmigration of Souls (Ken's Rage, Ken's Rage 2) Subconscious Transmigration of Souls (Lost Paradise, Legends ReVIVE)
Data
School	Hokuto Shin Ken

(無想転生, Literally meaning: Nil-Thought Rebirth) 

The ultimate secret technique of Hokuto Shin Ken. It is said that only one who embraces the true nature of sorrow can awaken its power. Kenshiro was the first man in Hokuto Shinken's 1800 year history to master Musō Tensei during the epic struggles against his friends and great rivals. Musō Tensei allows the user to achieve a state of "nothingness", impervious to attacks, and commune with the souls of fallen rivals (i.e. Toki, Ryūga, the Nanto Roku Seiken and later Raoh) in order to harness their techniques. Essentially, this internal technique allows the users body to become completely intangible and allows them to glide through air or phase.

Raoh also learned Musō Tensei when his feelings for Yuria unlocked the profound love and sadness within his heart.

Kenshiro Kasumi was rumored to know this technique.

Kaioh was able to disorientate Kenshiro with the distortional nature of his ultimate technique Anryu Tenha. Suffering the space sickness, Kenshiro lost control of the Musō Tensei and was unable to suppress his fighting spirit. Kaioh also absorbed Kenshiro's ki with his demonic aura (Matōki), weakening his attacks and ultimately defeating him. Kenshiro learned the secrets of Hokuto Sōke after this fight, perfecting the Hokuto Shinken style in his complete form. With Kaioh's technique nullified, Kenshiro was able to counter its effects.

Appears in

Original Manga

Kenshiro performs this against Raoh in volume 14, chapter 124, titled "A Stream of Blood!" (血の奔流!, Chi no Honryuu!)

Kenshiro performs this against Raoh in volume 15, chapter 131, titled "A Bloodstained Heart!" (心を血に染めて!, Kokoro o Chi ni Somete!)

Raoh performs this against Kenshiro in volume 15, chapter 131, titled "A Bloodstained Heart!" (心を血に染めて!, Kokoro o Chi ni Somete!)

Kenshiro performs this against Kaioh in volume 21, chapter 184, titled "An Honorable Defeat! The Unconscious Transmigration of Souls!! (玉砕!無想転生!!", Gyokusai! Musou Tensei!!)

TV Series

Kenshiro performs this against Raoh in episode 100, titled "The Ultimate Secret Technique, Unconscious Transmigration! Raoh, I've Got You Now!!" (究極の奥義無想転生! ラオウ、遂にお前を追いつめた!!, "Kyūkyoku no ōgi Musō Tensei! Raō, Tsuini omae o oitsumeta!!")

Kenshiro performs this against Raoh in episode 107, titled "Showdown at the North Star Mind and Body Training Ground! No One Can Stop Them Now!!" (決戦場は北斗練気闘座! もう誰も奴らをとめられない!!, "Kessen jō wa Hokuto Renkitōza! Mō dare mo yatsura o tomerarenai!!")

Raoh performs this against Kenshiro in episode 107, titled "Showdown at the North Star Mind and Body Training Ground! No One Can Stop Them Now!!" (決戦場は北斗練気闘座! もう誰も奴らをとめられない!!, "Kessen jō wa Hokuto Renkitōza! Mō dare mo yatsura o tomerarenai!!")

Kenshiro performs this against Kaioh in episode 136, titled "Little Brother Ken in Danger! Hyoh, Open Up Your Kind Soul!" (弟ケンの危機! やさしきヒョウよ今こそ心を開け!!, "Otōto Ken no kiki! Yasashiki Hyō yo imakoso kokoro o hirake!!")

Kenshiro performs this against Kaioh in episode 148, titled "Tragic Victim of Love! Kaioh's Foundation of Evil!!" (悲しき愛の犠牲者! これがカイオウ悪の原点だ!!, "Kanashiki ai no giseisha! Kore ga Kaiō aku no genten da!!")