A Japanese national flag flies outside the Bank of Japan headquarters in Tokyo, Japan, on Sept. 27, 2021.

Japan's economy averted recession but rebounded much less than expected in October-December as business investment slumped, a sign of the challenge the central bank faces in phasing out its massive stimulus program.

While private consumption is holding up against headwinds from rising living costs, uncertainties over the global economic outlook will weigh on Japan's delayed recovery from the scars of the Covid-19 pandemic, analysts say.