TOKYO, March 27 (Reuters) - Japan's Nikkei share average

fell on Friday, and was on track for a fourth straight weekly

decline, as fading hopes for an imminent ceasefire in the

U.S.-Israeli war with Iran dampened market optimism and pushed

investors into risk-off mode.

The Nikkei fell 1.6% to 52,740.09 as of 0035 GMT,

losing 1.3% so far this week. The broader Topix shed

0.8% to 3,614.20.

U.S. President Donald Trump said he will pause attacks on

Iran's energy plants for 10 days at Tehran's request, adding

that talks with Iran were going "very well."

An Iranian official, however, dismissed Washington's

proposal to end the conflict as "one-sided and unfair," clouding

prospects for de-escalation.

On the Nikkei index, 90 stocks advanced while 134 declined.