When Blackthorne grabs a tankard to hit Rodrigues, Blackhorne's wrists are tied in front of him. Then Rodrigues pulls out his pistol and stops Blackthorne from striking him. Then Rodrigues tells Blackthorne to go up to the deck and walk around. When Blackthorne is on the deck his wrists are tied behind his back again.
So far, it is been said that Busho are like Feudal Lords, if anything at all the more appropriate phrase in War Lord. While Feudal Lords may have private armies and wage private wars, they are not considered as Warlords as their status is based on legitimacy. Warlords appear when a state collapses. For example feudal lords took over in Europe when the Roman Empire fell. Warlordism is the inevitable consequence of anarchy. Many Warlords are former officers, clan leaders, mafia bosses or gang leaders. A Warlord may attempt to build a state at the area where he is in power, or he may simply plunder and rob his subjects. A state which has collapsed into warlordism is in continuous civil war. Such countries have few industries except agriculture, mining and contraband, such as drugs and weapons.
Lord Yabushige said that he would expand his nephews' fief to 3000 koku. Koku is a measure of volume. The tsubo is used to measure area. The estates of the Lords or Daimyo were valued for taxation using the Kokudaka system which determined value based on output of rice in koku, a Japanese unit of volume considered enough rice to feed one person for one year. One koku amounting to 5 bushels of rice, or 80 dry gallons (A dry gallon is 15% larger than a fluid gallon)
Blackthorne grabs a tankard to hit Rodrigues and Rodrigues pulls a pistol, stopping Blackthorne. But as Rodrigues pulls his pistol, it makes a clicking sound as if he were cocking the piece. With a flintlock pistol he would be pulling the cock back from half cock to full cock in order to arm it. Yet after these moves the camera goes to Rodrigues and his pistol is at half cock, NOT full cock. Further, no one would draw a flintlock pistol and cock it with the same hand as if they were in a Western participating in a shootout. To do so one would risk cutting their thumb on the flint in the cock. Instead, typically one would pull their pistol with their principle hand (in the case of Rodrigues, his right hand) while drawing back the cock with their other hand.
When the peasant finds the ship drifting into shore, the subtitles say "[Villager singing in Japanese]," but he is actually singing in Latin, as it is a traditional Gregorian chant, the Salve Regina.
Rodrigues holds Blackthorne at bay with his pistol at half cock (essentially a flintlock's safety). But a flintlock needs to be at to full cock to be operable. This is the origin for the old saying about "going around half cocked" (doing something while not being fully prepared). In short, anyone from the 17th Century would have known this and Blackthorne would not have been stopped by Rodrigues under these circumstances.