Cost of sales increased due mainly to an increase in net purchase of natural gas in Japan and an increase in depreciation owing to the commencement of production. Exploration expenses decreased, and selling, general and administrative expenses increased. Other expenses increased due to an increase in provision for allowance for doubtful accounts and provision for allowance for recoverable accounts under production sharing owing to the withdrawal from the Azadegan oil field in Iran. As a result, ordinary income increased by ¥66.5 billion, or 15.1%, to ¥508.5 billion.

Total amount of current income taxes and deferred income taxes increased. As a result of the above effects, net income increased by ¥21.4 billion, or 20.0%, to ¥128.6 billion from the previous fiscal year.