DEEP RESEARCH · ROHM
ROHM Co., Ltd.: Structural Transformation and a Sustainable Profitability Roadmap
A report on 1H FY2025 results, the 3S restructuring program, SiC strategy, and Toshiba/Denso partnerships.
0. Bottom line first
My conclusion is that ROHM is not just a cyclical recovery idea. After its first operating loss in 12 years, the company is redesigning its IDM model, capex discipline, and product mix. The 2028 target of JPY 100bn operating profit depends on SiC yield improvement and fixed-cost reduction.
Official fact: The source gives 1H FY2025 sales of JPY 244.2bn, operating profit of JPY 7.6bn, and net profit of JPY 10.3bn. The revised FY2025 plan is JPY 460.0bn sales, JPY 5.0bn operating profit, and JPY 9.0bn net profit.
Interpretation: The quality of earnings matters more than the return to profit itself. Incremental profit from higher sales and the depreciation-method change helped, while raw-material and inventory-related losses of about JPY 19.1bn and FX pressure of JPY 5.4bn show that the turnaround is still incomplete.
1. Operating backdrop and historical evolution
ROHM is a Kyoto-based global semiconductor company. The source frames the FY2024 loss, for the year ended March 2025, not as a simple cycle issue but as a combination of delayed response and structural inefficiency.
President Katsumi Azuma is pushing a return to ROHM's strengths: quality, supply responsibility, and a profitability-centered portfolio. The source recalls ROHM restarting production within one month after 1.8 meters of flooding during the 2011 Thailand flood.
- ROHM began with carbon film resistors in 1958 and started transistor and diode development in 1967.
- From the 1970s through the 1990s, it expanded into ICs, memory, microcontrollers, and custom ICs.
- The 2009 acquisition of Germany's SiCrystal secured the base for SiC wafer technology.
- In 2010, ROHM became an early SiC MOSFET mass-production leader.
2. 1H FY2025 results
| Item | 1H FY2025 | 1H FY2024 | YoY | Revised FY2025 plan |
|---|---|---|---|---|
| Sales | JPY 244.2bn | JPY 232.0bn | +5.3% | JPY 460.0bn |
| Operating profit | JPY 7.6bn | (JPY 0.9bn) | Returned to profit | JPY 5.0bn |
| Operating margin | 3.1% | (0.4%) | - | 1.1% |
| Ordinary profit | JPY 13.4bn | (JPY 0.1bn) | Returned to profit | JPY 11.0bn |
| Net profit | JPY 10.3bn | JPY 2.0bn | +398.9% | JPY 9.0bn |
| EBITDA | JPY 34.8bn | JPY 39.3bn | -11.5% | - |
Official fact: Higher sales added JPY 12.2bn of marginal profit and fixed-cost reduction added JPY 15.5bn, but raw-material and inventory valuation effects reduced profit by about JPY 19.1bn.
Interpretation: EBITDA falling 11.5% while operating profit recovered means I need to separate accounting relief from underlying cash-generation strength.
3. Cost variables: gold and FX
Gold price surge
ROHM assumed JPY 13,000 per gram in its plan, but market prices rose to JPY 20,000 per gram. Its relatively high gold wire bonding usage in automotive ICs raises cost pressure.
Yen strength
The 1H average rate was JPY 146.57/USD, versus JPY 152.30/USD a year earlier. The source estimates a JPY 5.4bn operating-profit hit.
Geopolitical risk
ROHM is reviewing local production for local consumption and has created an economic security office for global risk monitoring.
Management is pursuing material substitution, such as copper, and price increases for customers where substitution is hard. Approval and price pass-through take time, so 2H profitability can remain pressured.
4. Segment and market trends
| Segment | Sales | YoY | Segment profit | YoY | Trend |
|---|---|---|---|---|---|
| IC | JPY 114.2bn | +9.6% | JPY 12.9bn | +134.2% | xEV automotive growth and consumer strength |
| Discrete | JPY 99.9bn | +2.8% | (JPY 9.8bn) | Loss narrowed | SiC depreciation burden continues |
| Modules | JPY 17.1bn | -3.4% | JPY 2.4bn | +13.1% | Thermal printheads strong, optical modules weak |
| Other | JPY 12.8bn | +0.8% | JPY 2.0bn | +34.6% | High-reliability resistors strong |
| Market | Growth | Driver |
|---|---|---|
| Automotive | -0.3% | Bottoming; infotainment weak, xEV SiC resilient |
| Industrial | +3.5% | Customer inventory correction ending; FA recovering |
| Consumer | +23.6% | Amusement seasonality and Chinese appliance subsidies |
| Telecom | -10.8% | Base station and infrastructure investment delays |
| Computer/storage | +4.4% | PC and server demand stabilization |
By region, Japan grew 10.2% and China 6.5%, while the Americas declined 5.0% and Europe 3.3%. The source links this to Western EV softness, European energy costs, and EV subsidy reductions.
5. Restructuring: 3S and Fab-Light
- ROHM will use foundries and OSATs for hard-to-differentiate products such as sub-90nm logic.
- It will keep or strengthen internal capability in analog ICs and power devices where process know-how is the edge.
- It exited the silicon wafer business in March 2025 and is consolidating production lines.
- It offered voluntary retirement to about 200 headquarters employees in March 2025.
- The depreciation-method change from declining-balance to straight-line improved 1H operating profit by about JPY 15.5bn.
- FY2025-2027 cumulative capex was cut about 46%, from JPY 280bn to JPY 150bn.
6. SiC and strategic partnerships
SiC power devices are central to ROHM's goal of entering the global top 10. ROHM is operating Miyazaki Plant No. 2 as an 8-inch SiC dedicated fab, preparing mass production of 5th-generation devices with 30% lower on-resistance per unit area, and accelerating 6th- and 7th-generation development.
8-inch migration
The shift from 6-inch to 8-inch wafers is meant to raise chip output and improve cost competitiveness.
TRCDRIVE pack™
This SiC module began mass production in 2024 and supports ROHM's move from discrete components to higher-value solutions.
Toshiba and Denso
ROHM invested about JPY 300bn in Toshiba and received JPY 95bn of preferred-share repayment while talks continue. In May 2025, it agreed with Denso on a strategic partnership focused on analog IC development.
7. FY2028 JPY 100bn operating-profit bridge
| Improvement factor | Expected profit contribution | Details |
|---|---|---|
| SiC profitability | +JPY 34-40bn | 8-inch yield, 5th-generation devices, higher internalization |
| Site restructuring and business optimization | +JPY 18-22bn | Line consolidation, exit from unprofitable businesses, fixed-cost cuts |
| Sales growth excluding SiC | +JPY 14-20bn | AI server and automotive new products |
| Cost reduction | +JPY 9-12bn | Manufacturing efficiency and procurement optimization |
| Price optimization | +JPY 7-10bn | Price hikes and exit from low-margin products |
8. ESG and final checklist
- ROHM targets net-zero greenhouse gas emissions by 2050.
- FY2024 emissions were down 42.2% versus 2018; the 2030 target is a 50.5% reduction.
- It targets 100% renewable electricity by 2050; the FY2024 adoption rate was 45.7%.
- The female manager ratio is 13.8% versus a 2025 target of 15%.
- The shareholder return framework targets a dividend payout ratio of at least 30% and total payout ratio of at least 100% including buybacks.
My checklist is simple: stabilize 8-inch SiC yields, prove price pass-through and low-margin SKU pruning, and create enough AI-server and industrial revenue to offset EV softness.