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- Warren Buffett's Japan trade was a rare chance to win big with minimal risk, Charlie Munger said.
- Berkshire Hathaway borrowed money at 0.5% in Japan and invested in stocks paying a 5% yield there.
- "It was like having God just opening a chest and just pouring money into it," Munger said.
Warren Buffett's surprise bet on Japan during the pandemic was a once-in-a-lifetime chance to make a boatload of money with virtually zero risk attached, Charlie Munger says.