Kōga-ryū (甲賀流, "School of Kōga") is an umbrella term for a set of traditions of ninjutsu that originated from the region of Kōga (now the city Kōka in Shiga Prefecture). The samurai of Kōga-ryū were known as "Kōga-no-mono", and operated as shinobi throughout Japan's turbulent Sengoku period.

It was his son Oni no Kami Iechika, a talent in the military arts and in literature, who is said to have founded the Kōga-Ryū. He is said to have learned genjutsu (the art of illusion) from the Buddhist monk Tatsumaki Hoshi who lived in the area.

2008年6月4日 · Many would-be ninja then seem to have set themselves up as Koga ryu, probably to try to explain how their art was so different from that being presented as an Iga style. But in reality, the Iga and Koga regions were very close physically, culturally and politically.

2024年2月13日 · The alliance between the two ninja clans was terminated when Oda Nobunaga forced Koga to surrender in 1574. The Iga ninja clan faced defeat during the Tensei Iga War, which led to the dispersion of the Iga-ryu and Koka-ryu traditions across Japan as the surviving ninjas fled their homeland.

Koga-Ryu Kobudo is a Traditional Japanese Weapons Style that originated with the Koga Clan during the Tokugawa Era. The style is taught by Soke Joseph Ruiz.

Koga-ryu (or Koka-ryu) is the most famous school of ninjutsu (ninja technique) along with Iga-ryu, but it is the name that refers to collectively the schools originating from the Koka region in Omi Province and the school named "Koga-ryu" did not exist.

2025年2月13日 · Kōga-ryū is one of Japan’s most storied schools of ninjutsu, celebrated for its secretive methods and daring exploits. Hailing from the misty highlands of the Kōga region, its practitioners were masters of stealth, espionage, and unconventional warfare.

2024年11月26日 · The Koka-ryu ninjas, separated from the Iga-ryu by just one mountain, are based in Koga Province (now Koka City in Shiga Prefecture). They typically gather intelligence through farming and selling medicines and are known for their skills in magic and medicinal use.

Koka-ryu is a school of ninjutsu. It is one of the most well-known schools of ninjutsu, along with Iga-ryū. It originated from the town of Kōka, modern Kōka City in Shiga Prefecture. While the town of Kōka was under the jurisdiction of the Rokkaku clan, it was a kind of autonomous municipality composed of peasant unions, then called sō .

2015年11月6日 · This work is the translation of Fujita Seiko's "Ninjutsu kara Spy-sen e" (From Ninjutsu to Spy Warfare.) Published originally before the war, a later edition changed the name …