According to Kabutan, Yonhap and HKET, Japan's Nikkei 225 opened 379.43 points higher at 62,569.08 on Tuesday, rebounding for the first time in four sessions, while the TOPIX opened up 14.33 points at 3,987.31. Gains in U.S. technology shares after AI startup Anthropic made public its IPO filing with the U.S. Securities and Exchange Commission (SEC) supported chip and AI-related names in Tokyo. Ibiden, SUMCO and Advantest were among the gainers, while Daiichi Sankyo, Mitsubishi Estate and Sony declined. As of 01:00 UTC, the Nikkei was up 1,329 points at 63,518.

Seoul's KOSPI opened 189.18 points, or 3.46%, higher at 5,658.65, tracking Wall Street gains as renewed AI optimism and easing oil prices lifted investor sentiment. The Korea Exchange activated a buy-side sidecar for the KOSPI at 01:13 UTC, suspending program trading for five minutes; as of 01:20 UTC the index was up 241.75 points, or 4.42%, at 5,711.22. Samsung Electronics gained 4.69% and SK hynix jumped 7.14% in early trade.

Hong Kong's Hang Seng Index opened 48 points higher at 23,260, while the Hang Seng Tech Index rose 0.7% to 3,886. WuXi AppTec rose 5% after its results, Lenovo rebounded more than 5%, and HSBC fell 0.6% ahead of its third-quarter results.

Taiwan's TAIEX opened 169.77 points higher at 46,211.2 following the U.S. rebound and later rose more than 500 points, with TSMC turning positive after a lower start.

In mainland China, all four major A-share indexes opened higher: the Shanghai Composite rose 0.02%, the Shenzhen Component 0.49%, the ChiNext 0.89% and the STAR Composite 1.11%, with semiconductor and CPO sectors strengthening.