Tokyo  - The Tokyo market extended losses Wednesday after Wall Street declined overnight and concerns over domestic politics spread.

The benchmark Nikkei 225 Stock Average edged down 59.55 points, or 0.82 per cent, to 7,170.17.

The broader Topix index of all first section issues was also down 6.92 points, or 0.95 per cent, to 719.88.

The market sentiment remained pessimistic after the US Dow Jones industrial average extended its losing streak to a fifth market day on persistent economic worries.

Domestic politics also put pressure on the market as Japanese police on Tuesday arrested a secretary of Ichiro Ozawa, the president of the opposition Democratic Party of Japan, and others on suspicion of having received illegal corporate donations from a construction firm.

On currency markets at 9 am (0000 GMT), the dollar traded at 98.47-52 yen, up from Tuesday's 5 pm quote of 97.75-77 yen.

The euro traded at 1.2526-31 dollars, down from late Tuesday's quote of 1.2653-55 dollars, and at 123.40-45 yen, down from 123.69-73 yen. (dpa)