Saihei Hirose was born in Yabu-mura, Yasu-gun in Omi Province (present-day Yasu City, Shiga Prefecture) in May 1828 (11th year of the Bunsei era). In 1836 (7th year of the Tenpo era) at the age of nine, he moved to the Besshi Copper Mines, accompanying his uncle who worked there. Apprenticed to the House of Sumitomo, he took every opportunity to educate himself, eventually becoming general manager of the Besshi Copper Mines. Hirose was notable for the global perspective that he cultivated in the course of his career in the copper sector. This naturally included knowledge of the places to which copper from Besshi was exported and a sure grasp of the significance of the metal in the world. Recent research has revealed why Hirose, despite the objections of other executives, strove to prevent the requisition or sale of the Besshi Copper Mines at the time of the Meiji Restoration. Hirose had a vision of the future shaped by his recognition that the copper business was essential for Japan’s development. In dealings with the Tosa Domain, which the new government put in charge of negotiations concerning the Besshi Copper Mines, Hirose expressed his conviction that the House of Sumitomo’s continued ownership and management of the Besshi Copper Mines would be in the national interest. Hirose also expressed his views to Tomomi Iwakura, a leading statesman of the Meiji era. So persuasive was Hirose’s sincerity that the House of Sumitomo retained ownership and management of the mines. This cleared the way for the modernization and development of the Besshi Copper Mines, which laid the foundation for the industrial development of Niihama.