Mumbai, Jan. 22 -- The Japanese yen weakened toward 158.5 per dollar on Thursday, staying under pressure as concerns over Japan's fiscal outlook combined with an improvement in global risk sentiment. On the domestic side, Prime Minister Sanae Takaichi called a snap election and signaled looser fiscal policy, including a proposal to scrap the 8% sales tax on food, which added to worries about public finances. Externally, risk appetite improved after US President Donald Trump reversed his stance on Greenland, stepping back from threats of heavy tariffs on several European countries and announcing in Davos that a framework for future Greenland-related deal with NATO had been reached. Attention now turns to the Bank of Japan, which is due to ...