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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

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FORM 6-K

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REPORT OF FOREIGN PRIVATE ISSUER

PURSUANT TO RULE 13a-16 OR 15d-16

UNDER THE SECURITIES EXCHANGE ACT OF 1934

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For the month of May, 2025

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Commission File Number 001-39809

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MEDIROM HEALTHCARE TECHNOLOGIES INC.

(Translation of registrant’s name into English)

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2-3-1 Daiba, Minato-ku

Tokyo 135-0091, Japan

(Address of principal executive office)

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Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F:

☒ Form 20-F ☐ Form 40-F

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INFORMATION CONTAINED IN THIS FORM 6-K REPORT

Issuance of Press Release; Earnings Call Management Presentation

On May 20, 2025, MEDIROM Healthcare Technologies Inc. (the “Company”) issued a press release discussing certain Company financial results for the fiscal year ended December 31, 2024 and stating that the Company will hold a webcast to discuss its financial results for the fiscal year ended December 31, 2024 on Wednesday, May 21, 2025 at 8:30 a.m. U.S. Eastern Time.

The press release and a copy of the management presentation to be presented during the webcast are being furnished as Exhibits 99.1 and 99.2, respectively, to this report on Form 6-K, and shall not be deemed to be “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section.

EXHIBIT INDEX

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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

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