Idemitsu Kosan Co.,Ltd. revised earnings guidance for the year ending March 31, 2023. For the period, the company now expects net sales of ¥9,170,000 million against the previous guidance of ¥9,260,000 million; now expects operating income of ¥425,000 million against the previous guidance of ¥375,000 million; now expects net income attributable to owners of the parent of ¥325,000 million or ¥1,093.13 per share against the previous guidance of ¥280,000 million or ¥941.80 per share.