Exhibit 99.1

MEDIROM Healthcare Technologies Inc. Announces December 2025
Key Performance Indicators (KPIs)
Total Customers Served: 70,499 – Sales Per Customer: JPY 7,926 – Customer Repeat Ratio: 77.8%
Tokyo/Jan 30, 2026 – MEDIROM Healthcare Technologies Inc. (NasdaqCM: MRM), a holistic healthcare company based in Japan (the “Company”), today announced its major Key Performance Indicators, or KPIs, updated for the month of December 2025. Data is provided for all salons for which comparable financial and customer data is available and excludes certain salons where such information is not available.
Beginning in fiscal year 2026, in order to provide investors with a more detailed and precise explanation of the performance and progress of each business segment, we will publish quarterly performance reports and make disclosures on a quarterly basis. Accordingly, monthly KPI disclosures will be transitioned to quarterly reporting starting with the December 2025 release.
Salon Operation Business
The following monthly KPIs provide insight into the business fundamentals and progress of the Company, updated for the month of December 2025:
Sales per customer reached a record high of JPY 7,926 per visit, maintaining a level approximately JPY 3,120 above the industry average in Japan of JPY 4,806 (*1). In addition, the repeat customer rate, a key indicator of customer loyalty, improved by 0.2 percentage points year over year (from 77.6% to 77.8%). This reflects the continued expansion of a stable customer base and demonstrates improving operational efficiency on a per-salon basis.
Furthermore, since September 2025, we have launched a joint initiative with Tools for Humanity and Hakuhodo Inc. related to the issuance of World ID. This initiative is a strategic measure aimed at supporting our mid- to long-term growth. As part of promotional events to drive adoption, we have allocated a certain level of operational staff resources from our salon business, which has temporarily resulted in a slight decline in treatment utilization rates. On the other hand, this initiative is structured as a compensated operational scheme, and we believe that economic rationality for the business as a whole remains secured. We will provide further details regarding this initiative in our upcoming quarterly performance reports.
| ● | Number of Salons: 292 salons as of December 2025. |
| ● | Total Customers Served: 70,499 customers served in December 2025. |
| ● | Sales per Customer: ¥7,926 on average during December 2025. |
| ● | Customer Repeat Ratio: 77.8% in December 2025. |
| ● | Operation Ratio: 44.1% for the month of December 2025. |
| ● | Number of Salons with Data: 272 salons as of December 2025. |
The number of salons with data decreases when the Company closes salons with data available and increases as the Company opens salons with such data or upgrades the customer management system in existing salons to