noun, noun which may take the genitive case particle 'no'
lack of talent; incompetence; ineptitude
Formal or literary term for a lack of ability or talent. Often used in self-deprecating or critical contexts.
彼の不才が原因でプロジェクトは失敗した。
The project failed due to his incompetence.
不才の身ではありますが、精一杯努めます。
Though I am a person of little talent, I will do my best.
noun
my own lack of skill; my incompetence
Humble expression referring to one's own lack of ability. Used in formal self-introductions or apologies.
不才の私ですが、どうぞよろしくお願いいたします。
Though I am unskilled, I humbly ask for your kind guidance.
Compound of 不 (not) and 才 (talent, ability). The spelling 不材 uses 材 (material, timber) and is a rare variant.