Under the provision of the Civil Code that a subsequent will revokes earlier wills (Article 1023 of the Civil Code), the will of March 2000 has effect normally; however, since the contents of the two wills were completely inconsistent with each other, the third son Shinzaburo argued about the authenticity of the "second will" and brought the case before the court.
民法では新しい遺言書の内容を有効とする（民法1023条）ため、通常であれば2000年3月の遺言書が有効となるが、2通の遺言書の内容が全く異なることから、「第2の遺言書」の真贋に三男・信三郎が異議を唱え決着は法廷の場に持ち込まれた。