American investors can invest in the Nikkei 225 index, Japan's primary equity index, via an ETF. These include: iShares MSCI Japan ETF (EWJ) JPMorgan BetaBuilders Japan ETF (BBJP) WisdomTree Japan Hedged Equity Fund (DXJ) Franklin FTSE Japan ETF (FLJP) iShares Currency Hedged MSCI Japan ETF (HEWJ) WisdomTree Japan SmallCap Dividend Fund (DFJ) The Xtrackers MSCI Japan Hedged Equity ETF (DBJP) The iShares JPX-Nikkei 400 ETF (JPXN)