For example, when a boy was born as a legitimate first son of a permanent chief retainer, he often started his career as a Kosho, advancing to a domestic econony officer and then eventually becoming a chief retainer, or beginning as a Kosho and becoming a chief retainer after serving as an apprentice to a chief retainer.
例えば、永代家老の嫡子・総領として、生まれた場合は、小姓→用人職（側用人を含む）→家老職、あるいは、小姓→家老見習い→家老職と、班を進めることが多かった。