MRM 6-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 6-K

REPORT OF FOREIGN PRIVATE ISSUER

PURSUANT TO RULE 13a-16 OR 15d-16

UNDER THE SECURITIES EXCHANGE ACT OF 1934

For the month of August, 2026

Commission File Number 001-39809

MEDIROM HEALTHCARE TECHNOLOGIES INC.

(Translation of registrant’s name into English)

2-3-1 Daiba,Minato-ku

Tokyo 135-0091, Japan

(Address of principal executive office)

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

INFORMATION CONTAINED IN THIS FORM 6-K REPORT

As previously disclosed, on May 26, 2026, MEDIROM Healthcare Technologies Inc. (the “Company”) received a notice from the Listings Qualifications Department of The Nasdaq Stock Market LLC (“Nasdaq”) notifying the Company that it was not in compliance with Nasdaq Listing Rule 5250(c)(1), which requires listed companies to timely file all required periodic financial reports with the Securities and Exchange Commission. The Company is not in compliance with the rule due to its delay in filing its Form 20-F for the fiscal year ended December 31, 2025 (the “Form 20-F”). The Nasdaq notice provided the Company until July 27, 2026 to submit to Nasdaq a plan to regain compliance with the rule.

Following the Company’s timely submission of a compliance plan, Nasdaq informed the Company that it has been granted an extension to November 11, 2026, to regain compliance with the rule.

The Company continues to work diligently to file the Form 20-F as promptly as practicable. If the Company is unable to regain compliance with the rule by November 11, 2026, Nasdaq will notify the Company that its American Depositary Shares representing its common shares will be delisted. If that were to occur, the Company may appeal such determination to a Nasdaq Hearings Panel.

The information furnished in this report on Form 6-K 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, and shall not be deemed to be incorporated by reference into any filing of the Company under the Securities Act of 1933, as amended, or the Exchange Act, as amended, except to the extent specifically provided in such a filing.

Cautionary Statement Regarding Forward-Looking Statements

This report includes “forward-looking statements” within the meaning of the “safe harbor” provisions of the Private Securities Litigation Reform Act of 1995. The Company’s actual results may differ from their expectations, estimates and projections and consequently, you should not rely on these forward-looking statements as predictions of future events. Words such as “expect,” “estimate,” “project,” “budget,” “forecast,” “anticipate,” “intend,” “plan,” “may,” “will,” “could,” “should,” “believe,” “hope,” “predict,” “potential,” “continue,” and similar expressions are intended to identify such forward-looking statements. These forward-looking statements include the Company’s expectations with respect to future performance. These forward-looking statements involve significant risks and uncertainties that could cause the actual results to differ materially from the expected results. Most of these factors are outside the Company’s control and are difficult to predict. Factors that may cause such differences include but are not limited to risks and uncertainties related to the risks set forth under “Risk Factors” in the Company’s Annual Report on Form 20-F filed with the SEC on April 29, 2025 and in the Company’s other filings with the SEC. There can be no assurance that the Company will be able to regain compliance with the Nasdaq requirements for continued listing within the extended compliance period. The Company cautions readers not to place undue reliance upon any forward-looking statements, which speak only as of the date made. The Company does not undertake or accept any obligation or undertaking to release publicly any updates or revisions to any forward-looking statements to reflect any change in its expectations or any change in events, conditions, or circumstances on which any such statement is based.

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.