Idemitsu Kosan Hits Day High with Strong 3.16% Intraday Surge

Idemitsu Kosan Co., a prominent player in the oil industry, has shown significant activity today, gaining 3.16% as of November 10, 2025. The stock reached an intraday high of JPY 1,098.00, marking a notable performance against the backdrop of a declining Japan Nikkei 225, which fell by 1.19% on the same day.
Over the past week, Idemitsu Kosan has outperformed the Nikkei 225, with a weekly gain of 2.19% compared to the index's decline of 4.07%. In the month leading up to this date, the stock has increased by 6.62%, while the Nikkei 225 has seen a modest rise of 4.85%. However, the company's longer-term performance reveals challenges, with a 3-year decline of 67.56% and a 5-year drop of 49.19%.

Despite these fluctuations, Idemitsu Kosan maintains a strong management efficiency, evidenced by a return on capital employed (ROCE) of 9.95%. The company has also demonstrated healthy long-term growth in net sales, which have increased at an annual rate of 8.74%. As a large-cap entity with a market capitalization of JPY 1,302,924 million, Idemitsu Kosan continues to navigate a complex market landscape.