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Protesters display signs against a planned US military base relocation during a rally in Naha, Okinawa prefecture, on the southern Japanese island Saturday, Aug. 11, 2018. Image Credit: (Koji Harada/Kyodo News via AP)

Tokyo: Tens of thousands of protesters in Okinawa vowed to stop the planned relocation of a US military base, saying they want it off the southern Japanese island entirely.

Opponents of the relocation say the plan to move US Marine Corps Air Station Futenma from a crowded neighbourhood to a less populated coastal site would not only be an environmental debacle, but also ignore local wishes to remove the base.

About 70,000 people gathered Saturday at a park in the state capital of Naha under pouring rain ahead of an approaching typhoon and observed a moment of silence for Okinawa’s governor, Takeshi Onaga, who died on Wednesday of cancer.

In this May 2015, photo, Okinawa Gov. Takeshi Onaga shows off a banner reading "No, new U.S. base at Henoko, during a rally protesting against US military base movement, in Naha, Okinawa, southern Japan. Onaga, who led an anti-US military base movement on the southern Japanese island, died of pancreatic cancer Wednesday night, Aug. 8, 2018, at a hospital where he had been treated, Japanese media said. He was 67.   Koji Harada/Kyodo News via AP

Onaga, elected in 2014, had spearheaded opposition to the relocation and criticised the central government for ignoring the voices of Okinawans.

He had filed lawsuits against the central government and said he planned to revoke a landfill permit issued by his predecessor that is needed for construction of the new base.

Deputy Governor Kiichiro Jahana, representing Onaga at Saturday’s rally, said he will follow through with the revocation process as instructed by the governor and succeed his “strong determination and passion.”

Protesters pay tribute to Okinawa Gov. Takeshi Onaga, who died last week, during a rally in Naha, Okinawa prefecture, southern Japan Saturday, Aug. 11, 2018. Tens of thousands of protesters gathered in Okinawa vowing to stop a planned US military base relocation on the southern Japanese island. )   Yohei Nishimura/Kyodo News via AP

Futenma base

Okinawans are trying to block the government plan to start dumping soil into Henoko Bay within days to make a landfill for the new site of the Futenma base.

Environmental groups say construction at the bay risks corals and endangered dugongs.

The protesters held up signs saying “Henoko new base, NO!” and “Okinawans will not give up,” as they chanted slogans. They also adopted a resolution demanding the central government to immediately scrap the relocation plan.

Japan’s government says the current plan is the only solution, but many Okinawans want the base off the island. About half of the 50,000 American troops in Japan are stationed on Okinawa.

Onaga had said Tokyo’s postwar defence posture under the Japan-US security alliance was built on Okinawa’s sacrifice.

'Kingdom of the Ryukus'

The dispute over the Futenma relocation reflects centuries-old tensions between Okinawa and the Japanese mainland, which annexed the islands, formerly the independent kingdom of the Ryukus, in 1878.

Okinawa was Japan’s only home battleground in the final days of the Second World War, and the island remained under US rule for 20 years longer than the rest of Japan.

Okinawa is still forced to sacrifice for the interest of the mainland, Onaga’s son Takeharu, an Okinawa assemblyman, told the rally.

“The (relocation issue) is pushed to Okinawa because nobody on the mainland wants it,” he said, urging the rest of the country to also think about the issue.

“Let us keep fighting so we can achieve my father’s unfinished goal and give him good news.”