Kitō-ryū

Kitō-ryū is a traditional school of the Japanese [martial art] of jujutsu. Its syllabus comprises atemi-waza, nage-waza, kansetsu-waza and shime-waza. The style is focused on throws and sweeps, and many of these techniques are designed to be performed while in full armor.

Origin

Kitō-ryū is translated as "the school of the rise and fall." It is similar to forms of "Aikijutsu," including the principle of "ki" and Aiki (martial [arts principle)|aiki]. Equally, it uses principles such as "kuzushi no ri" or "breaking of balance" now associated with modern judo.

Base art of Judo

trained in Kitō-ryū and derived some of the principles that were to form the basis of modern judo from this style. Judo's Koshiki-no-kata is based on Kitō-ryū.
Since Kano Jigoro got the Kitō-ryū densho from his Sensei, Judo is the current Kitō-ryū official successor.
Modified safer versions of Kitō-ryū throws form large part of Judo's Nagewaza.