March 9, 2026
Staf Corporation

FOR IMMEDIATE RELEASE

Calendar Year 2025 Greenhouse Gas (GHG) Emissions: 33.6 t‑CO₂e
— SBT 1.5°C Target Achieved —

Despite a 12.5% increase in headcount and a high-cooling-demand summer, heat-reflective coating on outdoor AC units showed encouraging improvement in cooling energy consumption

* "Macnica Cut^®" is a registered trademark of Macnica, Inc.

1. Calendar Year 2025 GHG Emission Highlights

* Headcount includes executives and is as of July 1.

2. SBT 1.5°C Target Achievement

Staf Corporation has set a target to reduce GHG emissions (Scope 1 + 2) by at least 42% from the 2020 base year by 2030, in line with the SBT 1.5°C pathway. The corresponding interim benchmark for 2025 is 79.0% of the base year level.

Actual emissions for calendar year 2025 came in at 33.6 t‑CO₂e, or 77.9% of the base year (43.2 t‑CO₂e), outperforming the target by 1.1 percentage points. Despite headcount increasing from 40 to 45 (a 12.5% rise), per-capita emissions improved to 0.747 t‑CO₂e — a 9.9% year-over-year reduction.

Scope 1 emissions have been reduced to virtually zero and maintained at zero since 2023. As nearly all emissions fall under Scope 2 (electricity), managing electricity consumption remains the top priority.

3. Background and Conditions for 2025

The summer months (June–August) of 2025 saw sustained above-average temperatures according to Yokohama Local Meteorological Observatory data, resulting in elevated cooling demand. Month-over-month average temperature differences compared to the prior year were: June +1.6°C, July −0.6°C, August +0.2°C, and September −0.3°C.

CDD₂₂ (Cooling Degree Days, base temperature 22°C) averaged +2.36°C above the prior year for June–August, and the 2025 annual CDD₂₂ total reached 643.7 — the highest in the past eight years (vs. 617.1 in 2024). This indicates conditions that were particularly conducive to higher cooling electricity consumption.

Given these challenging conditions and a larger workforce of 45 employees, keeping GHG emissions within the target is attributable to the combined effect of day-to-day energy conservation practices and the heat-reflective coating initiative.

4. Heat-Reflective Coating: Effectiveness Analysis

In April 2025, Macnica Cut^® (a heat-reflective and insulating coating) was applied to the outdoor AC units at our office building. The coating was applied to units serving the 3rd, 4th, and 6th floors, while the 5th and 8th floors were left uncoated as a control group.

4‑1. Methodology

To estimate the coating's effectiveness, we compared electricity consumption between coated and uncoated floors within the same building. We calculated the rate of change in electricity use for both groups across two periods — pre-application (shoulder season: April–May) and post-application (cooling season: June–September) — and extracted the incremental effect of the coating through a difference-in-differences (DiD) approach.

Note that differences in occupancy levels and floor usage (e.g., presence of meeting rooms) between floors could not be fully controlled for, so the results should be viewed as a conservative estimate. Shoulder-season data (October–November) was also incorporated to minimize the influence of seasonal variation.

4‑2. Results

* For reference: A pre/post comparison showed a 9.1% change for coated floors and 5.8% for uncoated floors. However, since these figures include floor-specific condition differences, they were not adopted as the primary result. The sensitivity analysis figure of 11.4% represents the differential between coated floors (3F/4F/6F) and uncoated floors (5F/8F) and is unadjusted for occupancy and floor usage.
* Estimated savings range: 0.8–1.2 MWh (equivalent to 0.3–0.5 t‑CO₂e). The approximate midpoint of 1 MWh is used as the representative value in this release.

4‑3. Discussion and Limitations

The observed additional energy improvement of approximately 3–4% during the cooling season is believed to have contributed to meeting the emission target despite the high cooling demand of the 2025 summer. However, these findings are based on a single season of data, and floor-level differences in occupancy and equipment conditions could not be fully controlled. We plan to conduct a more robust evaluation using two seasons of data once 2026 summer results become available.

5. Outlook — Toward Our 2030 Target

The SBT 1.5°C pathway requires reaching 58.0% of the base year level (a 42% reduction) by 2030. Staf Corporation will continue and strengthen the following initiatives to achieve this goal.

① Managing Growth-Related Increases: As business expansion drives headcount growth, we will continue operational improvements aimed at sustaining the downward trend in per-capita emissions.

② Monitoring Emission Factor Trends: Since changes in the electricity provider's emission factor directly impact our Scope 2 emissions, we are also considering electricity plans with a higher share of renewable energy.

6. GHG Emissions: Annual Trends (2018–2025)

* Scope 2 emission factors are based on TEPCO Energy Partner's actual emission factors for each year. The 2025 figure provisionally uses the same factor as 2024 (0.000423 t‑CO₂/kWh) and will be updated once the official figure is published.
* The base year (2020) total emissions of 43.31 t‑CO₂e include 43.17 t‑CO₂e from Scope 2. The SBT pathway ratio is calculated on a Scope 1 + 2 basis.
* The 33.6 t‑CO₂e figure cited in the body text is the rounded value of 33.62.

7. SBT 1.5°C Pathway (2020–2030)

* The pathway is linearly interpolated from 100% (base year 2020) to 58.0% (42% reduction) in 2030, representing an annual decline of approximately 4.2 percentage points.

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