TOKYO (AFP) - Tokyo's jack-knifing stock market will not push Prime Minister Shinzo Abe off course in his mission to re-energise Japan's economy, he told business leaders on Tuesday.

Despite wild swings on the exchange in recent weeks, including a one-day drop of 7.3 per cent and a more-than 5 per cent fall another day, Abe's determination to fire the "three arrows" of his touted reforms is undiminished.

"I am resolute to tackle any difficulties without flinching," he told the general assembly of the Japan Business Federation (Keidanren) in Tokyo.

"I will continue shooting the three arrows without wavering, even though the markets have shown unstable movements in recent days."

The Nikkei 225 index climbed rapidly since November, when Abe emerged as favourite to become prime minister, surging about 80 per cent and making it one of the world's best-performing indices.

The bull run was powered by two of his "arrows" - huge government spending and a flood of easy money from the central bank that sent the yen plunging and brought paper profits to exporters.

But the third - structural reforms - sits somewhat undefined in his quiver, with some commentators saying a lack of detail in plans to cut red tape and get women into the workforce has contributed to market jitters.

Abe told business leaders on Tuesday he wanted to stimulate the corporate investment mindset, as recent data showed Japanese firms remain cautious in their spending.

"I set the next three years as a period to encourage intensive corporate investment," he said.

"I will take any measures possible in the areas of tax, budget, finance or deregulation during the period, to give you the chance you need." Abe, who has urged firms to boost salaries and employ more women, is expected to give more details on his third "arrow" in an address on Wednesday.