Idemitsu Q1 Profit Explodes to ¥217.5 Billion — Nearly Three Times Its Own Full-Year Forecast — as Crude Timing Swings Fuel Oil by ¥313 Billion

A quarter that outran the year

Idemitsu Kosan Co., Ltd. (TSE: 5019), Japan's second-largest oil refiner and the operator of the Apollostation retail network, published its first-quarter results for the fiscal year ending March 2027 on August 7, 2026. Led by President and Representative Director Noriaki Sakai, the group reported, for the three months from April 1 to June 30, 2026, revenue of ¥2,271,753 million, up 23.8% from ¥1,835,727 million, operating profit of ¥307,462 million against an operating loss of ¥4,038 million — a swing of ¥311,500 million — profit before tax of ¥316,885 million against ¥21,466 million, and profit attributable to owners of parent of ¥217,504 million, up 696.0% from ¥27,325 million. Basic earnings per share reached ¥179.63 against ¥22.31; there is no diluted figure. Comprehensive income was ¥235,534 million against ¥10,383 million.

Set that beside the outlook and the quarter becomes genuinely unusual. Full-year guidance, first published on May 12, 2026, is unchanged at profit attributable to owners of parent of ¥75,000 million, down 57.4%, on pre-tax profit excluding finance costs and excluding inventory impact of ¥140,000 million, down 48.6%, and attributable profit excluding inventory impact of ¥90,000 million, down 54.0%, for full-year EPS of ¥62.00. The first quarter alone booked 290% of that full-year attributable target, and management did not revise a figure.

That is not an oversight; it is what the definitions mean. Idemitsu guides on a normalised basis that strips out inventory valuation effects, precisely because a refiner's reported profit swings with crude prices in ways that have little to do with how well it refines and sells. The gap between ¥217.5 billion delivered and ¥75.0 billion guided is a measure of how large the inventory and timing effect was this quarter — and an implicit statement that the company does not expect it to persist.

One structural change frames all the comparatives. Idemitsu adopted IFRS from this quarter, replacing Japanese GAAP, with a transition date of April 1, 2025; the prior-year quarter and prior full year have been restated onto IFRS so the year-on-year columns are like-for-like. The group also early-adopted IFRS 18, the new presentation and disclosure standard that replaces IAS 1, applying it retrospectively. Separately, the quarterly financial statements attached to this release have not yet been reviewed by a certified public accountant or audit firm; the company said it would publish a version carrying the review report on August 14, 2026.

Fuel Oil: a ¥312.6 billion swing on cost timing

The segment note leaves no ambiguity about where the profit came from. Fuel Oil — refining, sales, import and export and trading of petroleum products, and from this quarter also functional paving materials, reclassified in from High Performance Materials — generated external revenue of ¥1,924,037 million, up 25.9%, and segment profit of ¥293,802 million against a segment loss of ¥18,765 million, a year-on-year swing of ¥312,567 million. That single line is larger than the group's entire reported profit before tax.

The mechanism is worth stating precisely, because it is the whole quarter. A refiner buys crude weeks before it sells the products made from it. When crude prices rise between purchase and sale, the products are priced off the higher current market while the cost of goods sold reflects the older, cheaper cargo — a positive time lag. Two things amplified that this quarter: crude prices rose from March onward, and the deteriorating Middle East situation lengthened voyage days, stretching the interval between purchase and sale and so prolonging the lag. The result was a positive timing gain of a size the segment has not seen in recent memory. It reverses on the way down.

The rest of the portfolio is far more sober. Basic Chemicals — olefins and aromatics — grew revenue 14.4% to ¥112,822 million and returned to a thin profit of ¥85 million from a ¥2,033 million loss, on positive inventory effects despite lower sales volumes. High Performance Materials — lubricants, functional chemicals, electronic materials, agrochemicals and functional feed — grew revenue 14.4% to ¥147,586 million but saw profit fall 15.6% to ¥14,524 million: wider spreads between inventory cost and product prices in functional chemicals, driven by higher naphtha prices, were more than offset by the absence of a one-off step-acquisition gain booked in the lubricants business a year earlier.

Power and Renewable Energy was the only segment to deteriorate outright, with revenue down 21.7% to ¥19,373 million and a segment loss of ¥1,304 million against a ¥994 million profit, on scheduled maintenance at Toa Oil Co., Ltd. and power plant trouble. Resources grew revenue 26.3% to ¥65,854 million and profit 47.0% to ¥18,914 million, split between an oil, gas and geothermal business whose revenue rose 60.9% to ¥16.7 billion and profit 119.9% to ¥11.6 billion on higher Vietnamese condensate volumes, and a coal and other business whose revenue rose 17.7% to ¥49.1 billion on higher thermal coal prices and volumes but whose profit slipped 3.3% to ¥7.4 billion on cost inflation and currency effects. The Other segment, mainly insurance and intra-group services, reported revenue of ¥2,079 million, down 37.6%, and profit of ¥136 million.

Reportable segments totalled ¥326,022 million of profit; with Other and adjustments of ¥3,526 million — mainly research and development costs not attributable to a segment — the group figure was ¥322,632 million. Adding interest income of ¥6,182 million and deducting a ¥1,241 million investment-related foreign exchange loss gives profit before financing and income tax of ¥327,573 million against ¥18,488 million.

The balance sheet shows exactly where the profit went

Total assets rose ¥787,749 million in three months to ¥6,056,972 million from ¥5,269,223 million at March 31, 2026. Almost the entire increase is one line: inventories jumped to ¥2,137,115 million from ¥1,357,844 million, a rise of ¥779,271 million, or 57.4%. That is the same crude-price move that produced the timing gain, now sitting on the asset side at higher carrying values.

It was funded with debt. Total liabilities rose ¥600,342 million to ¥4,380,011 million, with current bonds and borrowings up to ¥1,417,371 million from ¥995,648 million — an increase of ¥421,723 million in a single quarter — while non-current bonds and borrowings eased to ¥583,060 million from ¥594,060 million. Total equity rose ¥187,408 million to ¥1,676,961 million, and equity attributable to owners of parent to ¥1,646,599 million from ¥1,462,567 million.

Because assets grew faster than equity, the ratio of equity attributable to owners of parent fell to 27.2% from 27.8%, and the net debt-to-equity ratio rose to 1.17 from 1.03. Both are the arithmetic consequence of carrying a much larger, more expensive inventory book, not of a deterioration in the underlying business — but they are also the reason the timing gain is not free. Cash and cash equivalents were broadly stable at ¥377,662 million against ¥381,842 million.

Sixty-five million shares cancelled, dividend held at ¥36.00

The share count fell sharply. Shares issued including treasury shares dropped to 1,223,217,590 from 1,288,747,390 at the prior fiscal year-end — a reduction of 65,529,800 shares, or 5.1% — while treasury shares fell to 24,605,215 from 70,475,150. Capital surplus fell correspondingly to ¥203,491 million from ¥278,334 million, and the treasury share deduction narrowed to ¥28,646 million from ¥76,148 million: the signature of a cancellation of repurchased stock rather than a simple buyback. The average share count used for the quarter's per-share figures was 1,210,843,116, down 1.1% from 1,224,636,938 a year earlier.

The dividend was left where it was. Against ¥36.00 paid for the year to March 2026 (¥18.00 interim plus ¥18.00 year-end), the forecast for the year to March 2027 is ¥36.00 on the same split, unrevised from the previously announced forecast. A company that had genuinely re-rated its full-year earnings on the back of this quarter would ordinarily say so through the dividend; leaving it flat alongside unrevised guidance is a consistent message that management regards the quarter's windfall as timing rather than earnings power.

Two further disclosures round out the release. There was no significant change to the scope of consolidation during the quarter, and no changes in accounting policies or accounting estimates beyond the IFRS adoption itself. The tax line is worth a note in passing: income tax expense of ¥96,803 million on pre-tax profit of ¥316,885 million represents an effective rate of 30.6%, against a ¥6,171 million tax benefit in the prior-year quarter — the mirror image of a period in which reported profit was minimal.

JapanStockPulse provides informational content only and does not constitute investment advice. Figures are taken from the company's published earnings short report and may be subject to subsequent revision.