Nikkei drops most in 6 weeks as U.S. political concerns bite

TOKYO, Sept 30 (Reuters) - Japan's Nikkei stock average

logged its biggest drop in six weeks on Monday as investors went

into risk-off mode and took profits on recent gainers amid

growing concerns over a possible U.S. government shutdown.

The benchmark Nikkei shed 2.1 percent to 14,455.80,

its biggest one-day fall since Aug. 20. But the index rose 8

percent this month, posting its first monthly gain in five, and

is up 39 percent this year.

The broader Topix dropped 1.9 percent to 1,194.10.

Trading volume was at a three-week low, with 2.70 billion shares

changing hands.

Market participants were also awaiting an announcement by

Prime Minister Shinzo Abe on the government's economic growth

and tax strategy on Tuesday.