Under a draft fiscal 2017 budget approved by Abe's cabinet, the government expects a 0.2% increase in revenues from corporate, income and sales taxes to 57.71 trillion yen ($490 billion).
The yen's advance against other major currencies prompted the government to cut its fiscal 2016 tax revenue estimate from its initial plan by 1.74 trillion yen and issue additional government bonds even before the year ends in March.
Securing stable tax revenues is seen as a top priority at a time when Japan's aging population is expected to increase already ballooning social security expenses in the years ahead.
"Japan's tax revenues are easily swayed by currency moves just as we saw in fiscal 2016. We need to think about how to reduce such volatility," said Takuya Hoshino, an economist at the Dai-ichi Life Research Institute.
"For now, the yen has been weakening (since the election of Donald Trump as the next U.S. president), which could lift tax income. That said, though, the opposite is also true" should the yen strengthen, Hoshino added.
Earlier this year, Abe postponed raising the country's sales tax to 10%, originally planned for April 2017, to October 2019 as the economy lacked vigor. The hike is aimed at increasing state revenue to pay for social security.
Japan also relies heavily on issuance of government bonds for revenues, making it an urgent task to improve the country's fiscal health, which is now the worst among major developed countries.
Debt-servicing expenses, accounting for some 24% of next year's total spending, are expected to drop 0.4%, after the Bank of Japan's policy to keep the benchmark 10-year bond yield target at around zero enabled the government to lower its assumed interest rate used in compiling the budget.
The Organization for Economic Cooperation and Development has said that Japan heeds to implement "a more detailed and credible consolidation plan, including a path of gradual increases in the consumption tax" to sustain confidence in its public finances.
The Paris-based organization added that investment in education and training is required to boost the country's growth potential.