Asian shares have fallen sharply as investors react to the UK voting to leave the European Union.
After initial gains, Japan's benchmark Nikkei 225 closed down 7.7% to 14,982.48 points.
The UK has voted by 52% to 48% to leave the European Union after 43 years in an historic referendum.
Analysts said investor sentiment has been rattled by the looming uncertainty on markets around the globe.
As the British pound, hits its lowest levels since 1985, the yen has surged to 101 to the US dollar as investors now see the Japanese currency as a safe haven. Tokyo has for years been trying to keep the yen low as any surge in the currency hurts the country's exporters.
Karishma Vaswani, Asia Business correspondent: 'Asian investors in panic mode'
It wasn't supposed to be like this, one trader in Singapore told me this morning. His clients had priced in a Remain vote, and were - as he put it - pretty "complacent" about the results from the EU Referendum.
But as the results started trickling in, the mood most definitely soured. Another trader told me that activity on the firm's trading desk in Australia was so frenetic, that Singapore had to start taking some of the calls. Investors are in panic mode.
It's the same all over Asia. Shares sensitive to what goes on in the British economy and that are listed in London and in HK like Standard Chartered Bank, HSBC, Prudential and Glencore all taking a hit as investors sell, sell, sell and pour their money into traditional safe bets like gold.
Investors in Asia are on edge today, as they try and make sense of the results coming in from the UK. As one market watcher in Singapore told me, the last time there was this much chopping and changing in the markets was during the "Great Fall of China's stocks" last summer.