(Bloomberg) -- Mizuho Financial Group Inc. plans to dramatically ramp up its expansion into private markets to tap growing demand from Japanese institutional investors, an echo of the boom that unfolded in the US two decades ago, according to a top executive.Most Read from BloombergBlinken Stranded After Boeing 737 Breaks Down on Davos TripStocks Drop as Solid Data Fuel Fed-Pivot Repricing: Markets WrapApple to Sell Watches Without Oxygen Feature After Legal SetbackJPMorgan Says Hacker Attempts