Ninja Gangsters III: The Missing Daimyo Procession (1983)

Sanzo and Yumenogosuke are now traveling pretending to be a merchant and bodyguard in Edo. They are arrested on their way to Nakamura Castle in Oshu. The 30-odd members of the daimyo's procession, led by the lord of the Soma Nakamura clan is said to have left Iitate near the border in the morning and then have disappeared. Iwase Danjo, the feudal lord in control of the domain is preventing the news to leak out... and Sanzo and Gosuke are almost executed in prison to keep them from talking.