The benchmark Nikkei 225 index advanced 1.02 percent, or 287.48 points, to 28,403.22 in early trade, while the broader Topix index rose 1.12 percent, or 22.42 points, at 2,017.17.
Global investors perked up after Federal Reserve minutes suggested that US monetary policymakers were readying to slow the speed of their rate hikes.
“Investors have welcomed a perceived reduction in uncertainty around the Fed’s terminal rate,” said Stephen Innes of SPI Asset Management.
“Positive global risk sentiment could easily persist” in the final weeks of 2022, especially if US inflation calms down, he added.
“What is key now is whether investors can continue buying Tokyo shares after early trade, and bring the Nikkei to a higher range,” brokerage house Monex said.
Semiconductor-related shares were buoyant. Advantest, which makes testing kits for microchips, jumped 4.0 percent to 9,350 yen, and Tokyo Electron, which makes tools to build semiconductors, rose 3.48 percent to 46,350 yen.
Toyota started up but soon drifted into negative territory, falling 0.22 percent to 2,045.5.