Live news: Yen plunges past ¥160 per dollar amid volatile trading on national holiday Financial TimesJapanese yen weakens to 160 against the U.S. dollar for the first time since 1990 CNBCUSDJPY briefly crosses 160 Forex FactoryJapanese yen weak, USDJPY rises past 160 on middling BOJ, Fed fears Investing.comMorning Bid: Helter-skelter yen, US tech tonic Reuters