Yosaburo Nakajima was a pivotal Japanese business leader who served as the first president of the Citizen Watch Co., Ltd. His leadership during the 1930s was instrumental in transforming a nascent research institute into a foundational pillar of the Japanese horological industry. Nakajima is credited with laying the structural and commercial foundations of the Citizen empire, guiding the company through its initial phase of corporate organization and international expansion.

The origins of Nakajima’s involvement with the brand date back to 1930. At that time, the Shokosha Watch Research Institute, which had been founded in 1918 by Kamekichi Yamazaki to develop domestic watchmaking capabilities, was reorganized into a full-fledged corporation. Nakajima, who had previously served as the chief Japanese representative for the Swiss-based Schmid company, was appointed as the first president of the newly formed Citizen Watch Co., Ltd. in May 1930.

Under Nakajima’s administration, the company rapidly moved from experimental production to industrial-scale manufacturing. In 1931, the company completed its first wristwatch, the Model F, which featured a 10-line caliber movement. This was followed by the introduction of the 8-line K caliber in 1935, marking the brand’s entry into the women’s watch market. These technical achievements demonstrated Nakajima’s commitment to diversifying the company’s product line and establishing its reputation for precision.

One of Nakajima’s most significant contributions was the modernization of the company’s infrastructure. In 1936, he oversaw the construction of the Tanashi factory in Tokyo. This facility became the primary production hub for the brand and remains a key site for the company’s operations today. The establishment of this factory allowed for the vertical integration of manufacturing, enabling Citizen to produce both timepieces and the precision tools required for their assembly.

Nakajima also spearheaded the brand’s first foray into the global market. In July 1936, Citizen began exporting watches to Southeast Asia and the South Pacific, including markets in China. This move was a strategic step in Nakajima’s vision to make Japanese timepieces a recognized commodity outside of domestic borders, challenging the long-standing dominance of European manufacturers.

Yosaburo Nakajima served as president until October 1945, a period that encompassed the company’s growth during the 1930s and its transition to military production during World War II. He was succeeded by Shinji Nakajima. Today, Yosaburo Nakajima is remembered as the executive who professionalized the Citizen brand, transitioning it from a research-focused laboratory into a competitive, internationally-oriented manufacturer that would eventually become one of the largest watchmakers in the world.