Japanese shares rose on Tuesday after Prime Minister Shinzo Abe said his government would work closely with the central bank to boost the economy.*Markets are making nervous movements amid uncertainty over the global economic outlook,* said Mr Abe.His comments put pressure on the Bank of Japan to act on a pledge it made last week to support markets.Having fallen 5% on *Black Monday*, Japan's benchmark index, the Nikkei 225, recovered 1% after the statement.It had started the trading session more than 3% down but bounced back following Mr Abe's comments.Asian shares, along with the world's major stock markets, were battered on Monday in reaction to the threat of an oil price war between Russia and Saudi Arabia.Markets are already on edge from the economic fallout from the coronavirus outbreak which continues to spread globally.*There's uncertainty on when the coronavirus will be contained, and markets are making very unstable moves,* Bank of Japan (BOJ) governor Haruhiko Kuroda told parliament on Tuesday.