Shares in Japan's major banks tumbled Tuesday amid concerns over the nation's financial system, with the four biggest banks all hitting intraday lows for the year and Mizuho Holdings Inc. sinking below the key 100,000 yen mark.

Mizuho Holdings, the world's biggest bank in terms of assets, closed at 99,700 yen, down 19,300 yen, or 16.21 percent, from the previous day after testing its daily limit of 99,000 yen.

UFJ Holdings finished at its limit-low for the day of 89,000 yen, down 10,000 yen, or 10.10 percent.