The Nikkei 225 index closed lower in the last session, shedding 0.49% to finish at 64,678.48 points, as renewed geopolitical tensions between the US and Iran pushed oil prices higher, negatively impacting Japan's import-dependent economy. This decline was further exacerbated by profit-taking in technology stocks, including major exporters like Tokyo Electron and Sony, following a strong rally in AI-related chip companies. Concerns over the yen's weakness near 160 per dollar, potentially prompting Bank of Japan intervention, and recent increases in Japan's 10-year government bond yield also contributed to market jitters.