Japan would need to take a "decisive" step if speculative trades continue, its top currency diplomat said Monday after the yen weakened beyond 160 to the U.S. dollar -- its lowest level since July 2024 amid Middle East tensions."It is about time that a decisive measure is needed" if the current situation, where speculative moves are seen both in crude oil futures and currency markets, drag on, Atsushi Mimura, vice finance minister for international affairs, told reporters.After surpassing the 160 line in New York on Friday, the yen further lost ground and hit around 160.50 earlier Monday in…READ FULL ARTICLE