• Idemitsu Kosan FY2025 net sales fell 11.8% to JPY 8.11 trillion, operating income dropped 31.7% to JPY 212.2 billion.
• Net income attributable to owners rose 65.2% to JPY 171.9 billion, while ordinary income declined 14.9% to JPY 229.6 billion.
• Petroleum segment operating income slid 19.2% to JPY 175 billion, while Resources segment profit plunged 57.4% to JPY 29.2 billion.
• Functional Materials segment operating income climbed 24.5% to JPY 34.8 billion, while Basic Chemicals posted an operating loss of JPY 7.31 billion.
• Cash flow from operating activities eased 17.7% to JPY 392.4 billion, while capital expenditure increased 48.8% to JPY 165.7 billion.

Disclaimer: This news brief was created by Public Technologies (PUBT) using generative artificial intelligence. While PUBT strives to provide accurate and timely information, this AI-generated content is for informational purposes only and should not be interpreted as financial, investment, or legal advice. Idemitsu Kosan Co. Ltd. published the original content used to generate this news brief on July 10, 2026, and is solely responsible for the information contained therein.