Japanese stocks are poised for a downturn following a significant rebound of the yen late Friday. Cautious sentiment surrounding the upcoming general election is also likely to weigh on the market. Nikkei index futures on the Singapore Exchange dropped 2.4% to 52,510 points. The U.S. dollar was quoted at 155.03 yen, a notable shift from the 158.66 yen level at the close of Tokyo trading on Friday. Investors are awaiting details of Prime Minister Sanae Takaichi's economic plans ahead of the general election in early February. The Nikkei Stock Average had risen 0.3% on Friday, closing at 53,846.87 points.