TOKYO - Japanese cash equities were closed for Marine Day on July 20, leaving investors to assess whether Tokyo can stabilize after last week’s technology-led rout as oil prices rose above $90 a barrel, the yen remained near four-decade lows and global markets braced for another test of the artificial intelligence trade.

The Tokyo Stock Exchange cash market was closed for the national holiday, although JPX derivatives holiday trading was open. The Nikkei 225 Stock Average last closed on July 17 at 64,141.12, down 4.03%, while the broader TOPIX fell 2.72% to 3,919.21. The Nikkei ended that session more than 11% below its June 25 record close, putting it in correction territory after a sharp unwind in semiconductor and AI-related shares.

Market attention on July 20 therefore shifted to futures, overseas technology shares, South Korea’s chip sector, oil prices and the yen. Reuters reported that Japan’s Nikkei had shed 6.4% the previous week in a technology-led rout, making Tuesday’s reopening an important test of whether bargain buyers return to Tokyo or whether overseas investors continue cutting exposure to regional AI stocks.

Nikkei CNBC’s recent market framing has centered on the close link between Tokyo and Seoul. Japanese semiconductor shares have been moving in tandem with South Korea’s Samsung Electronics and SK Hynix, as overseas investors treat the two markets as part of the same regional AI and memory-chip trade. With South Korea’s Kospi falling again on July 20, pressure remained on Japanese names such as Kioxia, Tokyo Electron, Advantest, SCREEN Holdings and Sumco.

The immediate question is whether Kioxia can stabilize after plunging 16.1% on July 17. The memory-chip maker has become one of the clearest gauges of sentiment toward Japan’s AI rally after losing more than half its value from its recent peak. A failure to attract dip-buying when Tokyo reopens would suggest that the correction still has further to run.

The yen remained under pressure near 162 to the dollar, with the dollar quoted around 162.36 yen during global trading. The currency is still close to its weakest level in about four decades, keeping traders alert for possible intervention by Japanese authorities. Yen weakness supports exporters’ overseas earnings but raises import costs for fuel, food and raw materials, making it a growing burden for households and smaller companies.

Japanese government bond yields were not tested in regular cash trading because of the holiday, but the bond market remains a central risk for the week ahead. The 10-year JGB yield had eased below 2.7% after the July 17 equity selloff, but investors remain focused on whether inflation, oil prices and fiscal-policy concerns push yields back toward the politically sensitive 3% level.