Wikipedia
Araki-ryū is a system of traditional Japanese martial arts. Its curriculum includes empty-handed striking and grappling, and the use of a number of weapons.
Araki-ryū was founded by a samurai named Araki Muninsai Minamoto no Hidetsuna, a student of Fujiwara Katsumi. Araki served under Toyotomi Hideyoshi during the invasion of Korea. Toyotomi personally noted Minamoto's combat ability, and he received commendations for valour. At some unknown date, he went into a meditative retreat for several months, and began teaching his fighting system in the region near modern Nagoya.
Much of the style's curriculum, in particular its close combat work (torite-kogusoku), is derived from Takenouchi-ryū. As well as jujutsu, Araki-ryū makes use of a number of different medieval Japanese weapons. This includes, long-and-short sword, spear, nagamaki, naginata, and staff. Several factions in northern Japan integrated weaponry using weighted chains, including kusari-fundo (weighted chain), kusaribō (chain staff) and the kusarigama (chain sickle).