Used tools like maps, charts, and magnetic compasses on his journeys.
I believe its all of the above
Samurai warriors had to follow a set of rules for their lives and battles which was called <u>Bushido</u> - today we can translate it as "the samurai's way". The term Bushido was officialy used for the first time in 17th century and it became more popular at the end of 19th century, however there are some signs that it was already used in some ways in 10th century.
They are both deaf people that are in the government.