TOKYO (Kyodo) -- Tokyo stocks ended slightly lower Tuesday amid a cautious mood ahead of monetary policy meetings in the United States and Japan, while the market also found some support with SoftBank Group surging after U.S. President-elect Donald Trump hailed its investment plan.

The 225-issue Nikkei Stock Average ended down 92.81 points, or 0.24 percent, from Monday at 39,364.68. The broader Topix index finished 10.13 points, or 0.37 percent, lower at 2,728.20.

On the top-tier Prime Market, decliners were led by insurance, oil and coal product, and securities house issues.

The U.S. dollar remained firm in the lower 154 yen range most of the day on speculation that the Bank of Japan would not raise interest rates at its policy meeting on Wednesday and Thursday, dealers said.

At 5 p.m., the dollar fetched 154.06-08 yen compared with 154.11-21 yen in New York and 153.50-52 yen in Tokyo at 5 p.m. Monday.

The euro was quoted at $1.0497-0498 and 161.72-76 yen against $1.0506-0516 and 162.03-13 yen in New York and $1.0503-0504 and 161.23-27 yen in Tokyo late Monday afternoon.

The yield on the benchmark 10-year Japanese government bond rose 0.010 percentage point from Monday's close to 1.075 percent as investors sold the debt, tracking an overnight rise in long-term U.S. Treasury yields.

The Fed will hold its two-day meeting starting later in the day amid expectations the U.S. central bank will lower rates.

Stocks were mostly in positive territory in the morning on the back of strong technology issues tracking overnight advances by their U.S. counterparts, but turned negative in the afternoon, affected by falls in some Asian markets, analysts said.

"Investors became cautious ahead of key events," said Maki Sawada, a strategist in the Investment Content Department of Nomura Securities Co. "In such a situation, some investors tend to adjust their positions by selling some stocks."

Nikkei's fall was somewhat trimmed as heavyweight SoftBank Group rose more than 4 percent after Masayoshi Son, chief executive of the technology giant, met with Trump in Florida on Monday, saying his company will invest $100 billion in U.S. projects, centering on artificial intelligence and other emerging technologies, over the next four years.

The Japanese conglomerate closed the day 416 yen, or 4.4 percent, higher at 9,837 yen.