The section leader is the decision-maker and usually the best player in his/her instrumental section, though that is not always the case. Some small sections are combined into one section, such as the bass section-- comprised of the tubas, euphoniums, and contrabass-- of which Asuka Tanaka is the section leader. Depending on the culture of each ensemble, the section leader is chosen either by audition or by popular vote for seniority or playing ability.

It should be noted that a principal player does not necessarily equal a section leader, and vice versa.