<prompt> Translate the following text to EnglishIli kuadhimisha kuunganishwa kwa Japani baada ya vita vya wenyewe kwa wenyewe vya zaidi ya karne moja, Hideyoshi alikuwa amefanya ngome hiyo kuwa ngome kubwa zaidi nchini, kwa hivyo Tokugawa alihisi wajibu wa kuiharibu mnamo 1615 baada ya kumnyanganya mrithi wa Hideyoshi.  <response>: To celebrate his unification of Japan after more than a century of civil war, Hideyoshi had made the castle the countrys greatest fortress, so the Tokugawa felt obliged to destroy it in 1615 after snatching power away from Hideyoshis heir. 