Order of Musashi Shinobi Samurai
The Order of Musashi Shinobi Samurai is a Japanese shinobisamurai clan which served Tokugawa Ieyasu and the Tokugawa Shogunate. They served the Tokugawa Shogunate as intelligence operatives called onmitsu (undercover agents), and metsuke (inspectors), and in the 19th century, as diplomats.
Source: Wikipedia — Order of Musashi Shinobi Samurai (CC BY-SA 4.0)