Hello everyone, I am Hideki Somemiya, CFO of Resonac Holdings Corporation. Thank you very much for your understanding and support for our company. Let me explain the financial results overview of Q3 of fiscal 2024. Page 2 shows key takeaways. There are two points. First, the Q1-Q3 results were strong, driven mainly by semiconductor and electronic materials segment. Sales and profit grew significantly year-on-year. The second point is that based on these results and the market trends, we revised the full-year forecast. Operating income forecast is revised upward compared to earlier forecast. Now let me explain Q1-Q3 financial results. Page 4 shows the summary of Q1-Q3 consolidated results, comparing fiscal 2023 and 2024. Please refer to the table on the left. In Q1-Q3, net sales were JPY 1 trillion, 27.5 billion, up JPY 85.2 billion , or 9% year-on-year.
Operating income was JPY 58.9 billion , up JPY 63.2 billion year-on-year. Ordinary income was JPY 46.5 billion, up JPY 53.6 billion year-on-year. Net income attributable to owners of the parent was JPY 50.8 billion, up 57.1 billion year-on-year. EBITDA was JPY 142.4 billion, up JPY 64.9 billion year-on-year. EBITDA to sales ratio, or EBITDA margin, was 13.9%, improvement of 5.6 points. Page 5 shows the breakdown of operating income changes from JPY 4.3 billion to JPY 58.9 billion in Q1-Q3 in 2024. Profit increased by JPY 63.2 billion year-on-year. The biggest factor was sales volume, pushing up the profit by JPY 34.5 billion. Mainly, JPY 34.7 billion increase was in semiconductor and electronic materials. The major reason was sales volume recovery of semiconductor materials and hard disk media. Sales price pushed up the profit by JPY 21.4 billion.
About half of this is related to higher naphtha prices in the chemicals segment. Another half was due to corporate-wide impact from the weak yen and price revisions reflecting higher material costs. Variable and fixed costs pushed up the profit by JPY 0.9 billion. In chemicals, higher naphtha prices lowered profit. In semiconductor and electronic materials, the effect of the fixed cost reduction through the restructuring of hard disk media business was a major factor. Lastly, others pushed up the profit by JPY 6.4 billion. In semiconductor and electronic materials, product mix improved, and the impact of lower others and adjustments is included. Pages 6- 7 show the breakdown of segment operating income changes. These are for your reference. Page 8 shows the results by segment. Here we are showing the sales, operating income, and EBITDA by segment, comparing fiscal 2023 and 2024.
Semiconductor and electronic materials shown at the top show much higher sales and operating income year-on-year. Chemicals fall from the top, so lower sales and profit. Pages 9- 12 show segment summary. First, page 9 shows the semiconductor and electronic materials. Sales grew 36% year-on-year to JPY 328.5 billion. Operating income saw a significant increase of JPY 57.8 billion to reach JPY 45.3 billion. In addition to gradual recovery of semiconductor demand, semiconductor materials for AI semiconductor was strong, and sales volume of hard disk media recovered. Segment EBITDA margin increased from 11.4% in Q1-Q3 2023 to 26.2%. Profitability is improving. Page 10 shows mobility. Sales were almost flat year-on-year at JPY 160.7 billion. Operating income increased by JPY 0.7 billion year-on-year to JPY 3.5 billion. In automotive products, as car production recovered gradually, there was a launch of products for new models.
However, sales declined due to the sluggish demand in Thailand, which is one of the important markets. As for lithium-ion battery materials, weak consumer demand continued, but sales grew on higher sales volume for EVs. Page 11 shows innovation enabling materials. Sales grew by 6% year-on-year to JPY 71.8 billion. Operating income increased by JPY 2.9 billion year-on-year to JPY 8.5 billion. Both sales and profit grew on price revision to reflect higher material costs and increased sales volume. Page 12 is chemicals. Sales were almost flat year-on-year at JPY 381.1 billion. Operating income declined JPY 3.8 billion- JPY 6.4 billion. Petrochemicals and derivatives sales grew on higher naphtha prices, but sales volume was down due to the first-half shutdown maintenance of petrochemical derivatives. Sales of basic chemicals were largely unchanged year-on-year. Higher material price of some products led to lower operating income.
Finally, both sales and profit of graphite electrodes decreased on lower prices due to weak market condition. That's all for segment results. Page 13 shows the non-operating income and expenses and extraordinary profit and loss year-on-year comparison. Starting with the net non-operating income and expenses, this worsened by JPY 9.5 billion year-on-year. The major reason was the foreign exchange, which has worsened. While yen was weak in Q1, Q3 in the fiscal 2023, in fiscal 2024, especially at the end of September, yen strengthened, and as a result, FX loss booked in Q1, Q3, and FX gains and loss worsened by JPY 9.9 billion year-on-year. Next, net extraordinary profit and loss improved by JPY 2.3 billion year-on-year. During Q1 and Q3 this year, JPY 25.7 billion gain on sale of former headquarters and former hard disk media facility in Taiwan was booked.
In the same period last year, the similar amount of gain was booked for the sale of diagnostic medicine business and others. The difference is related to the restructuring. In Q1-Q3 2024, the JPY 4.7 billion business restructuring expenses was booked in relation to the sale of regenerative medicine subsidiaries. The same period the previous year, there was an extra retirement payment as well as the impairment loss in hard disk media business.
JPY 10 billion was booked. In comparison to that, there was an improvement. Page 14 is consolidated balance sheet. Starting from the left, the total assets at the end of September were JPY 2 trillion, JPY 59.6 billion, up JPY 27.6 billion from the end of last fiscal year. Total intangible fixed assets were down by JPY 34.9 billion due to the amortization of goodwill. Cash and deposits increased by JPY 52.6 billion, mainly from the business activities.
Total liabilities was JPY 1 trillion, JPY 443.3 billion, down JPY 10 billion from December end due to the JPY 18.8 billion decreases in other liabilities. JPY 100 billion convertible bond issued during the term is included in interest-bearing debt in this table. Long-term debt was repaid with this, and therefore increase of the interest-bearing debt remained at JPY 16.3 billion from the end of last fiscal year. Net interest-bearing debt at the end of the last fiscal year was JPY 826.2 billion and JPY 789.8 billion at the end of September, down JPY 36.3 billion. Total net assets were JPY 616.4 billion, up JPY 37.7 billion from the end of last fiscal year. The JPY 50.8 billion net income in Q1-Q3 pushed up the retained earnings, and dividend payment of the last fiscal year pushed down the retained earnings.
Higher revaluation reserve for land included in the total accumulated other comprehensive income is offset by the same decrease amount of the retained earnings, having no impact on the net asset balance. Major indicators are shown at the bottom, mainly with the increase of the equity and net debt-to-equity ratio improved from one to 0.9x . The equity ratio also improved from 27.2% at the December end to 28.7%. As usual, at the footnote, we mentioned that to calculate the net DE ratio, we evaluate 50% of the subordinated loan as equity capital based on the credit rating of Japan Credit Rating Agency. Next, let me talk about 2024 performance forecast. Page 16 shows the consolidated forecast. In the middle, there is a column C. This is a revised full-year forecast announced on November 12th.
Based on the recent performance trend and others, in comparison to the operating loss and others of the previous fiscal year, sales forecast is up by JPY 93.1 billion, operating income up by JPY 81.3 billion. Net income attributable to owners of the parent is up by JPY 51 billion. EBITDA margin is expected to improve from 8.2%- 13.6%. On the right-hand side, please refer to the column B. This is a comparison to earlier forecast. Operating income forecast is up by JPY 16.5 billion. As a result of the detailed review of non-operating income and expenses and extraordinary profit and loss, income before income taxes remains the same. And with higher taxes due to the improved profit, net income attributable to owners of the parent is expected to slightly decrease. Page 17 shows a revised forecast by segment. In the middle, there is a column which says four-year forecast.
Out of the four-year operating income forecast of JPY 77.5 billion, 80%, JPY 61.5 billion is in semiconductor and electronic materials. The four-year EBITDA margin of this segment is expected to be 26.6%. Now, on the right-hand side, we are showing the 2023 results as well as earlier forecast comparison. Higher net income and higher profitability is thanks to the continued strength of the semiconductor and electronic materials segment. In comparison to the earlier forecast, while sales and profit of semiconductor and electronic materials was up, in chemicals, sales and profit were lower due to the decreased naphtha prices. On this slide, we are showing the quarterly trend from Q1-Q3. You can see the improvement every quarter. In addition to the absolute amount of the profit, EBITDA margin has reached 31.4% in semiconductor and electronic materials in Q3, and corporate-wide margin was 16.3%.
So we are getting closer to our target of 20%. In a rough estimate, excluding the other things and derivatives businesses, company-wide EBITDA margin in Q3 is about 20%. We will continue to improve profitability toward achieving 20% EBITDA margin. Pages 19 and onward are appendix. These are for your reference.