noun
adviser; consultant; counselor
A person who provides expert advice to an organization, company, or individual, often in an official or formal capacity.
彼は会社の顧問として経営陣に助言している。
He advises the management as a company consultant.
法律顧問に相談し
We consulted the legal adviser before signing the contract.
noun
school club supervisor; faculty adviser
Typically a teacher who oversees a school club, providing guidance and administrative support rather than direct coaching.
野球部の顧問の先生が練習を見に来た。
The baseball club's faculty adviser came to watch practice.
彼は茶道部の顧問を務めている。
He serves as the supervisor of the tea ceremony club.
From Middle Chinese 顧問 (kuH mjunH, 'to look back and ask; to consult'). The Japanese reading こもん is the go-on pronunciation. The word originally meant 'to inquire' and later developed the nominal sense of 'one who is consulted; adviser'.