Japanese stocks are poised for a downturn as the recent rebound of the yen has intensified concerns over corporate profitability. Nikkei index futures on the Singapore Exchange fell 0.5% to 52,715 points. The dollar was quoted at 154.20 yen, compared to 154.21 yen at the close of Monday's Tokyo stock market. Investors are closely monitoring comments from government officials regarding the yen and awaiting details of Prime Minister Sanae Takaichi's economic plan, with a general election looming in early February. The Nikkei Index fell 1.8% on Monday to 52,885.25 points.