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What to do with your savings in Japan
As an alternative to investing you'll find at least some banks eg. Rakuten that will give you preferential interest rates(still 0.1% though) just for opening a free brokering account. As this is still your individual savings account your money is as safe as it was before opening your account. I certainly wouldn't buy to hold any stock or fund that is linked to the Nikkei right now. Income stocks outside of the 225 may be safer, but you'd still need to buy enough of them that their individual results don't affect your bottom line.