The Invesco CurrencyShares Japanese Yen Trust (FXY) is the most common yen ETF which holds physical yen in its account. ProShares also offers two yen ETFs—the ProShares Ultra Yen ETF (YCL) and ProShares UltraShort Yen ETF (YCS). These two options, though, are levered. YCL provides 2x long exposure and the YCS provides 2x inverse exposure to the yen.