 He obtained the signature of the Convention of Kanagawa on March 31, 1854.Soon, the 1858 Chinese defeat in the Anglo-French expedition to China further gave a concrete example of Western strength to Japanese leadership.In 1858, the Treaty of Amity and Commerce between France and Japan was signed in Edo on October 9, 1858, by Jean-Baptiste Louis Gros, the commander of the French expedition in China, opening diplomatic relations between the two countries.