彼は若い頃から天下統一という大望を抱いていた。
From his youth he had harbored the great ambition of unifying the country.
大望を果たすまでは故郷に帰らないと誓った。
He vowed not to return home until he had achieved his great ambition.
病に倒れ、彼の大望はついに実現しなかった。
He fell ill, and his grand aspiration was never realized.