A very formal, humble first-person pronoun used in writing or formal speech, often in letters or public addresses. Conveys self-deprecation and respect toward the listener.
See also: 不肖 (ふしょう)
I, unworthy as I am, have assumed the position of chairman this time.
Though I am but a humble person, I will do my utmost.
Standard kanji spelling for this humble first-person pronoun.
Mixed kanji-kana spelling; less common but still encountered.
Compound of 不肖 (ふしょう, 'unworthy') + 私 (わたくし, 'I'). The phrase literally means 'unworthy I' and is used as a set humble expression.