Japan is closely watching foreign exchange moves and will take “all necessary steps,” Finance Minister Shunichi Suzuki said Monday, as the yen fell to a fresh 34-year low versus the U.S. dollar. The yen has been on a downward trend, falling to around 153.70 in Tokyo, a level unseen since 1990, though caution is persisting over possible market intervention by Japanese authorities to slow the Japanese currency’s decline.