The yen has slipped against the dollar, the euro and other risk-linked currencies such as the Aussie and New Zealand dollar.Asian shares markets were twitchy this morning (August 18th) after suffering sharp losses yesterday, with closely watched trading causing erratic movement in currencies markets.Speaking to Reuters, Ayako Sera, a market strategist at Sumitomo Trust & Banking, commented: "Gains in yen crosses today were a recovery from excessive losses the previous day, rather than investors being actively engaged in risk trading."Kosuke Hanao, head of treasury products sales at HSBC, added that there was a pervading sentiment that Chinese shares had been in for a correction, but analysts are today evaluating whether the 5.8 per cent slump on the Shanghai Stock Exchange was overdone.The yen and the dollar both climbed yesterday as forex traders moved into safe-haven currencies and out of riskier assets such as the Aussie and the New Zealand dollar.