Okinawa Prefecture will hold its gubernatorial election on September 13. Incumbent Governor Denny Tamaki, in office since 2018, is seeking a third term. His main challenger is Koja Genta, a former deputy mayor of Naha backed by the Liberal Democratic Party (LDP). While local elections in Japan typically center on issues like the local economy and social welfare, Okinawa’s pivotal geographic location means this election could become a critical variable influencing the future security situation of East Asia.

Okinawa sits at the heart of the First Island Chain and is the Japanese territory closest to both Taiwan and mainland China. Consequently, since the end of World War II, Okinawa has served as the U.S. military’s “Keystone of the Pacific,” bearing a heavy military burden. Currently, nearly 70 percent of U.S. military bases in Japan are located in Okinawa. 

Beyond the U.S. presence, Japan’s Self-Defense Forces (SDF) are also expanding their deployments in Okinawa as the country accelerates a defense strategy known as the “Southwest Shift.” For instance, the Ground Self-Defense Force’s 15th Brigade, stationed in Okinawa, is set to be reorganized into a division by March 2027, increasing its personnel from 2,300 to 3,900. Furthermore, over the past decade, the Japanese government has deployed SDF units to Yonaguni, Miyako, and Ishigaki, islands located west of Okinawa Island, while bolstering radar, air defense, and rapid-response capabilities to counter the People’s Liberation Army’s (PLA) growing military activity in the East China Sea and the Western Pacific beyond the First Island Chain.

In fact, the PLA and the SDF have frequently engaged in standoffs in the area in recent years. On December 6, 2025, a fighter jet launched from a Chinese aircraft carrier locked radar on an Air Self-Defense Force fighter while flying over the high seas southeast of Okinawa Island, sparking a strong protest from Tokyo. Additionally, Chinese naval fleets and joint Chinese-Russian fleets have frequently transited the waters surrounding these islands. These developments underscore how Okinawa is increasingly becoming a frontline for great power confrontation.

For the people of Okinawa situated at the eye of the storm, the issue of U.S. and Japanese military deployments is not a simple matter of support versus opposition. It involves conflicting inner sentiments. 

On one hand, as China increases its activities near Okinawa – particularly with frequent patrols by its coast guard vessels in the waters around the Senkaku Islands (known in China as the Diaoyu Islands) – Okinawan perceptions of the military forces stationed there are shifting. According to public opinion polls, a greater number of Okinawans now view the presence of the SDF and even the U.S. military as necessary compared to the 1970s, shortly after the islands’ return to Japan. 

On the other hand, this shift does not alleviate Okinawans’ collective anxiety. For Tokyo, the deployment of missiles, radar systems, and SDF units may signify enhanced deterrence and situational awareness. However, for the local residents, these facilities also imply a higher likelihood that their home could become a frontline in a conflict or a target for attack. This has sparked a contradictory mindset and an enduring debate among the Okinawan people: Do military assets guarantee their safety or bring greater danger?

Since taking office as prefectural governor in 2018, Tamaki has made opposition to the construction of the new U.S. base at Henoko and the reduction of the base burden on Okinawa the core of his political agenda. However, the LDP’s victory in all four of Okinawa’s electoral districts during the February 2026 House of Representatives election clearly served as a warning sign for Tamaki. Furthermore, a capsizing incident in March involving boats participating in protests against the Henoko base, which resulted in two fatalities, including a student on a school trip, triggered criticism directed at Tamaki, a staunch opponent of the base. The upcoming election will serve as a critical test of Tamaki’s stance against the Henoko base, the expansion of SDF deployments in Okinawa, and joint Japan-U.S. military exercises.

This is why the contest between Tamaki and Koja holds significance that extends beyond local politics. If Tamaki is re-elected, Tokyo may continue to face political resistance from the Okinawa prefectural government. While a governor cannot single-handedly halt the Japanese government’s national defense policies, a local government opposed to Tokyo’s military agenda can still raise the political costs of implementation and engage in ongoing bargaining regarding the burden of military bases and local interests. Under these circumstances, although Japan may proceed with the military deployment in the Nansei (Southwestern) Islands, the rift between Tokyo and Okinawan society could widen further.

For Tokyo, another challenge lies in preventing the discord with Okinawa from undermining Japan-U.S. alliance operations in the region. Clearly, the United States expects Japan not only to sustain investment in military deployments on Okinawa, thereby sharing security responsibilities, but also to effectively manage tensions between military forces and Okinawan society. 

In September 2025, U.S. forces and the SDF conducted “Resolute Dragon 25,” a large-scale exercise spanning a vast area that included Okinawa. This sparked widespread protests among local residents. Some protesters took to the streets, directly forcing the SDF to alter its operational plans. This underscores that the Japan-U.S. alliance cannot be sustained by military facilities alone: It requires the understanding and support of the communities hosting them. If Tamaki wins re-election, the friction between Okinawan society and the military presence will be difficult to resolve over the ensuing four years.

Conversely, a victory for Koja could present a significant political opportunity for Tokyo. His election might mark a turning point in the relationship between the Okinawan prefectural government and the central government, potentially opening up greater scope for local cooperation on base policies and defense infrastructure in the Nansei Islands.

If Okinawan society increasingly perceives itself as bearing the risks of war solely for the strategic interests of Tokyo and Washington, the expansion of their military capabilities could exacerbate tensions with the local population. However, if Tokyo can convince Okinawa that strengthening defenses serves not only Japan’s national security but also the protection of Okinawa itself, then the military deployment in the Nansei Islands might secure a more stable political foundation. Ultimately, the outcome hinges largely on who leads Okinawa for the next four years.

Furthermore, this election also has implications regarding China. In recent years, Beijing has paid increasing attention to Okinawa, attempting to leverage the Okinawan people’s historical memories and anti-base sentiment to construct political narratives directed against both Japan and the United States. For instance, following Tamaki’s visit to China in July 2023, Chinese state media highlighted the historical ties between China and Okinawa (Ryukyu), as well as the tensions between Okinawan society and the U.S. military. 

Furthermore, in recent years, Beijing has increasingly used its state media to question Japan’s sovereignty over Okinawa, which is a stance Tamaki has generally sought to avoid criticizing. Regarding the upcoming election, Beijing likely hopes that Tamaki, who holds a relatively moderate view toward China, will remain in office, thereby allowing for continued propaganda efforts challenging the Japan-U.S. military presence in Okinawa. However, this is clearly an outcome that neither Tokyo nor Washington desires.

In conclusion, this election will shape the relationship between Tokyo and Okinawan society over the next four years. More importantly, it will determine whether the Japan-U.S. alliance can maintain a solid foundation in Okinawa amidst China’s rise and escalating risks in the Taiwan Strait. This is precisely why the election is bound to draw intense scrutiny from Washington, Beijing, and Tokyo alike.