Japan's gross domestic product (GDP) growth was revised sharply higher in the first quarter, data on Monday showed, however doubts remain over whether the momentum can be sustained.
GDP rose an annualized 3.9 percent in the first quarter, higher than the preliminary reading of a 2.4 percent increase, and up from 1.5 percent in the October-December period.
On a quarter-on-quarter basis, the economy grew 1 percent, higher than the initial reading of 0.6 percent, and up from 0.4 percent in the previous three months.
The upward revision mostly reflects better-than-expected capital spending, which rose 2.7 percent on quarter, far higher than the 0.4 percent preliminary estimate.
"Overall, the GDP report was quite solid – you're looking at strength in capital expenditure, private consumption and residential investment. These are positive signs that the recovery is on track," said Izumi Devalier, Japan economist at HSBC.
The data follows supportive comments over the weekend from government spokesman Yasuhisa Kawamura, who said the economy was "returning to a growth orbit" on the sidelines of the Group of Seven (G7) summit.