Asia markets lose ground, with Nikkei dropping 3.1%, ASX off 0.2%

Romina Amato | Red Bull | Getty Images. Asia markets took "sell in May" sentiment to heart on Monday, with the Japanese benchmark index tumbling over 3 percent and Australian bank shares selling off. · CNBC

Asia markets took "sell in May" sentiment to heart on Monday, with the Japanese benchmark index tumbling over 3 percent and Australian bank shares selling off.

The Nikkei 225 (Nihon Kenzai Shinbun: .N225) closed down 518.67 points, or 3.11 percent, at 16,147.38, after initially tumbling as much as 4.14 percent in early trade. On Thursday, the benchmark index shed 3.61 percent, after the Bank of Japan (Tokyo Stock Exchange: 8301.T-JP) surprised markets by standing pat on its monetary policy.

In South Korea, the Kospi (Korea Stock Exchange: .KS11) ended down 16 points, or 0.80 percent at 1,978.15. Down Under, the ASX 200 (ASX: .AXJO) retraced most of its morning losses of over 1 percent to close down 9.21 points, or 0.18 percent, at 5,243.00, with the heavily-weighted financials sub-index finishing down 1.56 percent.

Markets in China, Hong Kong, Taiwan, Singapore and Malaysia are closed for a public holiday.

Japan's market turmoil may be spreading around the region, analysts said.

"While lingering disappointment from the Bank of Japan's inaction continues to weigh in Japanese markets, negative sentiment started filtering through to other global markets and this ripple effect should be closely monitored as the negative impact from waning global risk sentiment could add more fuel to an already overheated yen," Stephen Innes, senior trader at OANDA, said in a note Monday. He expects the yen may strengthen further.

Major Japanese exporters sold off sharply, with shares of Toyota (Tokyo Stock Exchange: 7203.T-JP) closing down 3.75 percent, Nissan (Tokyo Stock Exchange: 7201.T-JP) down 4.95 percent and Honda (Tokyo Stock Exchange: 7267.T-JP) off 3.98 percent in the wake of a stronger yen, which is usually negative for exporters as it makes their products less competitive overseas and decreases their overseas profits when converted back into the Japanese currency.

The Japanese yen (Exchange: JPY=) traded at 106.51 against the dollar on Monday as of 2:35 p.m. HK/SIN, up 0.16 percent from an earlier low of 106.14. But that still marks a significantly stronger Japanese currency, as the pair traded at the lower range of the 107 level on Friday afternoon Asia time and at levels above 111 last week.

Kit Juckes, a global foreign-exchange strategist at Societe Generale, said the dollar/yen pair "looks like a lemming hurling itself off a cliff, and the yen bulls may end up feeling a bit like lemmings in due course."

Sony (Tokyo Stock Exchange: 6758.T-JP) shares dropped 4.01 percent after the company reported a loss of 88.3 billion yen for the fiscal fourth quarter on Thursday after the market close.