TOKYO (Kyodo) -- Tokyo stocks rose Monday, lifted by semiconductor and electronics issues that were bolstered by hopes impending U.S. tariffs on chips would not be as harsh as feared.

The 225-issue Nikkei Stock Average ended up 396.78 points, or 1.18 percent, from Friday at 33,982.36. The broader Topix index finished 21.60 points, or 0.88 percent, higher at 2,488.51.

On the top-tier Prime Market, gainers were led by pharmaceutical, chemical and food issues.

The U.S. dollar briefly weakened to the lower 142 yen range in Tokyo, as the yen, seen as a safe-haven asset, was sought amid lingering concern over a possible global economic slowdown triggered by U.S. President Donald Trump's trade war, dealers said.

At 5 p.m., the dollar fetched 143.06-08 yen compared with 143.48-58 yen in New York and 142.83-85 yen in Tokyo at 5 p.m. Friday.

The euro was quoted at $1.1389-1391 and 162.94-98 yen against $1.1357-1367 and 162.95-163.05 yen in New York and $1.1363-1365 and 162.30-34 yen in Tokyo late Friday afternoon.

The yield on the benchmark 10-year Japanese government bond ended at 1.335 percent, down 0.010 percentage point from Friday's close, as the debt, also seen as a safe-haven asset, was bought on fears over an economic slump caused by U.S. tariffs.

On the stock market, the Nikkei index briefly surged over 2 percent soon after the opening, as investors welcomed the U.S. announcement Friday that the government would exclude smartphones and other devices from so-called reciprocal tariffs.

Some gains were pared as investors grew skeptical about the tariff exemption on electronics after U.S. Commerce Secretary Howard Lutnick said Sunday that it is only a temporary measure, with those items eventually expected to fall under "semiconductor sectoral tariffs."

Regarding the tariff on chips that is set to be announced soon, "Investors were apparently expecting that the measure is likely to be a little more subdued than the previous ones," said Seiichi Suzuki, chief equity market analyst at Tokai Tokyo Intelligence Laboratory Co.

Meanwhile, the market was cautious ahead of the start of negotiations between Japan and the United States later this week over possible U.S. tariff concessions on Japanese imports, brokers said.