Japan's Nikkei 225 share average fell sharply on Friday, dropping 2.69% to 64,634.
The steep decline was driven by a broad-based retreat in technology stocks, triggered by a sharp fall in shares of Google parent Alphabet.
99% to 69,779, as investors rotated out of AI-related heavyweights.
The move intensified market concerns regarding the sustainability of heavy artificial intelligence spending across the sector.
The selloff marks a significant acceleration of selling pressure that has weighed on Japanese equities throughout the week.
On Thursday, the index had already slipped 0.99% to 69,779, as investors rotated out of AI-related heavyweights.
The Friday drop extends the negative momentum, pushing the benchmark further from recent highs and signaling deepening caution among traders.