"We have been and must continue to buy ETFs flexibly. We'll discuss at the March review how specifically we could make our purchases more nimble," Kuroda said.
"There's a tide of higher rates across the board, and whether the US does an extra five basis points than Germany is neither here nor there," said Jason Wong, senior market strategist at BNZ in Wellington.
The BOJ eased monetary policy twice last year to cushion the economic blow from COVID-19, including by creating a new lending facility aimed at channeling funds to cash-strapped firms via financial institutions.
Having already extended a raft of measures last month to ease funding strains for firms hit by the pandemic, the BOJ is expected to hold off ramping up stimulus at the Jan. 20-21 policy meeting, the sources said.
About 67% said they plan to further curb leisure and entertainment-related outings, while 71% said they don't plan to change the amount they spend to enjoy time they spend at home.
With the pandemic seen prolonging the battle to hit its elusive 2% inflation target, the central bank last month also announced a plan to reassess its policy framework to make it more sustainable.
Others saw room to tweak the YCC's operations such as by seeking to control yields "more carefully" and allowing for a moderate steepening of the yield curve, it showed.
Yields were also supported by a sense of relief after Britain and the European Union agreed a free trade deal, averting economic turmoil at the year's end - the deadline for Brexit.
In a sign the board was bracing for a long-term battle to ease the strain from COVID-19, one board member said the BOJ must "deeply discuss" policy responses aimed at achieving its 2% inflation target, according to the minutes.
Years of ultra-low interest rates have crushed commercial banks' margin, while its huge asset buying has drawn criticism for drying up liquidity and distorting market pricing.
The Bank of Japan can also promote green finance by setting ESG guidelines for its asset management, which would send a message to private banks that they should do so too, she said.
The BOJ's move comes ahead of its two-day rate review that concludes on Friday, when it is expected to extend the March 2021 deadlines of a range of measures aimed at easing corporate funding strains.
Once it hit, there were no mandatory lockdowns in the country, with the government instead asking people to stay at home -- a request that was largely heeded.