His comments came in an exclusive interview with AFP in his office, after the International Monetary Fund welcomed his plans but warned of "considerable downside risks" over Tokyo's ballooning national debt.
Since coming to power in December, Abe has launched an array of pro-business, big-spending measures, mixed with aggressive monetary policy by the Bank of Japan, in a package touted as "Abenomics".
The measures are designed to end more than a decade of deflation that has smothered sustained growth in Japan, where national debt stands at more than twice the size of its economy, the worst among industrialised nations.
"Japan has a problem of accumulated debt. Unless we end deflation, in any case, this accumulated debt problem will not be solved," Abe told AFP.
"I think this is the only way. Now, the Japanese economy is generally recovering smoothly," he said.
Abe was speaking shortly before French President Francois Hollande touched down in Tokyo for a three-day visit expected to feature talks on business ties that both sides hope will spur their economies.
"The Japanese economy has been stagnant and has suffered from deflation over the last 15 years," the premier said.
"To counter this, I will push through drastic monetary policy, fiscal measures and a growth strategy that will stimulate private sector investment, so that the economy can be rid of deflation."
Abe has touted the "three arrows" of his growth strategy. The first two -- government spending and monetary easing -- were fired earlier in the year, sending the stock market racing as the once sky-high yen plunged.
The third "arrow" -- structural reforms of Japan's regulation-bound economy -- remain to be fully fleshed out, but in a speech yesterday, Abe began outlining his broad aims.
