TOKYO (Kyodo) -- Tokyo stocks plunged Friday, on selling fueled by concerns over the impact of upcoming U.S. car tariffs and offloading of shares after investors secured dividend rights before the end of the fiscal year.

The 225-issue Nikkei Stock Average ended down 679.64 points, or 1.80 percent, from Thursday at 37,120.33. The broader Topix index finished 58.22 points, or 2.07 percent, lower at 2,757.25.

On the top-tier Prime Market, every industry category lost ground, led by securities house, marine transportation, iron and steel shares.

The U.S. dollar fell to the lower 150 yen range in Tokyo as the yen, seen as a safe-haven asset, attracted buying following the sharp drop in stocks.

It earlier hit around a one-month high of 151.21 yen as long-term U.S. Treasury yields rose overnight on speculation over a potential resurgence of inflation in the United States due to President Donald Trump's tariff plans, dealers said.

At 5 p.m., the dollar fetched 150.38-40 yen compared with 151.00-10 yen in New York and 150.54-55 yen in Tokyo at 5 p.m. Thursday.

The euro was quoted at $1.0786-0788 and 162.21-25 yen against $1.0797-0807 and 163.04-14 yen in New York and $1.0765-0766 and 162.06-10 yen in Tokyo late Thursday afternoon.

The yield on the benchmark 10-year Japanese government bond fell 0.040 percentage point from Thursday's close to 1.545 percent, as the debt was also sought as a safe-haven asset.

Automakers led declines on the stock market, with the Nikkei index briefly losing over 900 points, as concerns prevailed that Trump's upcoming additional 25 percent tariff on all automobiles would hurt the profits of Japanese automakers and related industries.

Among automakers, Toyota Motor and Honda Motor each fell over 4 percent, while steel and shipping stocks also saw notable declines.

Investors were also hesitant to buy amid uncertainty over a potential new U.S. announcement on reciprocal tariffs next week, brokers said.

The market's sharp losses resulted from the unwinding of dividend-driven buying, which helped prop up prices Thursday, making stocks particularly vulnerable to selling pressure, brokers said.

"Once that buying disappears, even a small wave of selling can trigger a drop like today's," said Seiichi Suzuki, chief equity market analyst at Tokai Tokyo Intelligence Laboratory Co., adding that a lack of fresh trading cues also amplified the day's downturn.