Tokyo’s benchmark index closed above 20,000 on Wednesday for the first time in 15 years as hopes for strong Japanese corporate earnings drove the market higher, despite a weak lead from Wall Street.

The Nikkei 225 index at the Tokyo Stock Exchange added 1.13 percent, or 224.81 points, to finish at 20,133.90. It last closed above the psychologically important level in April 2000.

The last time the Nikkei was at that level Sony’s groundbreaking PlayStation 2 was in stores, the Dot-com bubble was collapsing and Bill Clinton still occupied the White House.

The broader Topix index of all first-section shares climbed 0.80 percent, or 12.91 points, to 1,621.79.

Attention now turns to the start of Japanese earnings season with many firms set to report bumper fiscal-year profits.

“Since the Nikkei is a simple average of 225 (companies), what’s behind its rise are expectations for higher corporate earnings,” Toshihiko Matsuno, senior strategist at SMBC Friend Securities, told AFP.

“Where the market will go from here depends on how company earnings fare.”

A weak yen also provided support. The dollar was at 119.64 yen Wednesday, against 119.63 yen in New York and well up from 119.44 yen earlier Tuesday in Tokyo.

A pending trade deal could also push the market higher, he added, as cash from domestic and foreign pension funds flow in.

Tokyo and Washington emerged Tuesday from marathon talks on a Pacific-wide free-trade area saying they were close to an agreement.

Japanese Prime Minister Shinzo Abe is hoping the Trans-Pacific Partnership (TPP) — which includes a dozen nations accounting for about 40 percent of the global economy — will help him push through reforms to the protected agricultural sector, a key element in his bid to stimulate growth at home.

“(The Nikkei) could climb higher if TPP talks reach an accord, sparking hopes for stronger external trade,” said Matsuno at SMBC.