“Necessity is the mother of invention” — needs or hardships often lead to creative solutions.
工具がないから手作りで代用した。必要は発明の母だ。
We improvised by hand because we had no tools. Necessity is the mother of invention.
彼の貧しい環境が新しいビジネスを生んだ。まさに「必要は発明の母」だ。
His poor circumstances led to a new business. It's truly 'necessity is the mother of invention.'