Tokyo stocks renewed their plunge on Monday, with the key Nikkei index falling 6 percent to a fresh 26-year low despite Prime Minister Taro Aso's call earlier in the day for emergency measures to help stabilize the market.

The Nikkei 225 bled 486.18 points to close at 7,162.90, its lowest level since Oct. 7, 1982, when it finished at 7,114.64.

The broader Topix, covering all first-section issues, was down 59.65 points, or 7.40 percent, to end at 746.46, its lowest finish since January 1984. It was dragged down by banking and other financial issues that heavily influence the index.