"Fist of the North Star: Raoh Side Story: Tyrant of the Heavens") by Youkow Osada was serialized in Weekly Comic Bunch from issues #231 (March 24, 2006) through #300 (August 24-31, 2007).
The manga focuses on Raoh, the eldest of the four Hokuto Brothers, as he seeks to use his strength to restore order in the post-apocalyptic world alongside his childhood friends Reina and Souga.
Sōkoku no Garō: Hokuto no Ken: Rei Gaiden (蒼黒の餓狼 -北斗の拳 レイ外伝-)[a] by Yasuyuki Nekoi was serialized in the Weekly Comic Bunch from issues #286 (May 11–18, 2007) to 393 (July 31, 2009), lasting six collected editions.
Shirogane no Seija: Hokuto no Ken: Toki Gaiden (銀の聖者 北斗の拳 トキ外伝),[b] by Yuka Nagate, was published in Weekly Comic Bunch from issues #301 (September 7, 2007) to 363 (December 12, 2008).
However, he was forced to surrender his pursuit of the succession after being bathed in a radioactive fallout during the Nuclear War, and began wandering the wasteland with no aim, accompanied by his servant Ramo.
During the hiatus a special chapter titled Aku no Kadō (悪の花道, "Flower Arrangement of Evil") was published on Comic Bunch #383 (May 22, 2009), drawn by Hiromoto while he was hospitalized, but was not included in the later collected edition.
[1] The manga centers around Jagi before becoming the masked villain he turned out to be in Fist of the North Star, depicting him as a young child seeking the affection of his adoptive father Ryuken.
Hōkō no Kumo: Hokuto no Ken: Jūza Gaiden (彷徨の曇 北斗の拳 ジュウザ外伝, "The Wandering Clouds: Fist of the North Star: Juza Side Story") by Missile Kakurai was published in Weekly Comic Bunch from issues #414 (January 2, 2010) to #445 (September 10, 2010).
It centers around Juza of the Clouds as he wanders the wasteland without drive or purpose before he joined the Five Chariots and became sworn guardian to the Last General of Nanto.