It shows that the Japanese are ignorant about slaves, they cost more than an employee... you need to feed them, make sure they are healthy so they can do the work in the first place, shelter them and make sure they actually stay. An employee you just give a salary and let themselves figure out...
Wow the quality of the work, is all over the place (not the translation), columns are copied pasted, some environments are photo bashed and the characters are hand drawn so sloppily lol it's been a while since i read this, and wow.
the modern hand pump has been around since the 1400s but there have been water lifting mechanics since 3000 bce. it's odd they still use a bucket and a rope.
They really need to read up on the power allowed of a title, only the monarch of his family had the power to order executions. And adopted by a baron isn't really a step of from being a commoner, as the Barons where usually vied as titled commoners (in the eyes of higher nobles.)