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 June, 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

Issuance of Press Release

On June 25, 2026, MEDIROM Healthcare Technologies Inc. (the “Company”) issued a press release announcing that MEDIROM MOTHER Labs Inc., a subsidiary of the Company, has received an additional order from the 8th Division of the Japan Ground Self-Defense Force (“JGSDF”) for its remote health monitoring system, “REMONY®,” which utilizes the charge-free smart tracker, “MOTHER Bracelet®.”

A copy of the press release, dated June 25, 2026, is furnished as Exhibit 99.1 hereto.

The information furnished in this report on Form 6-K (including the exhibit hereto) 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.

EXHIBIT INDEX

Exhibit No.		Description
99.1		Press release of the Company

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.

	MEDIROM Healthcare Technologies Inc.
Date: June 25, 2026
	By:	/s/ Fumitoshi Fujiwara
		Name: Fumitoshi Fujiwara
		Title: Chief Financial Officer

EX-99.1

Exhibit 99.1

MEDIROM MOTHER Labs Expands Deployment of "REMONY®" Remote Health Monitoring System in JGSDF 8th Division

— Additional Orders Triple Implementation Scale; "MOTHER Bracelet®" Enables Continuous Safety Monitoring During Extended Training

MEDIROM MOTHER Labs Expands Deployment of "REMONY" Remote Health Monitoring System in JGSDF 8th Division Remote Health Monitoring System Tokyo, Japan – June 25, 2026 – MEDIROM MOTHER Labs Inc. (Headquarters: Minato-ku, Tokyo; President: Yoshio Uekusa), a subsidiary of MEDIROM Healthcare Technologies Inc. (Headquarters: Minato-ku, Tokyo; CEO: Kouji Eguchi; NASDAQ: MRM), hereby announces that it has received an additional order from the 8th Division of the Japan Ground Self-Defense Force (JGSDF) for its remote health monitoring system, "REMONY®", which utilizes the charge-free smart tracker, "MOTHER Bracelet®."

Against the backdrop of a growing need for heatstroke prevention and health monitoring during prolonged training, the JGSDF highly evaluated the system for its ability to operate continuously without charging, even under harsh training environments. As a result, the scale of deployment has expanded to approximately three times that of the initial implementation.

■Example of the device being worn

■About the Japan Ground Self-Defense Force 8th Division

The Japan Ground Self-Defense Force 8th Division is responsible for the defense of southern Kyushu and disaster relief operations in the region. The division conducts a wide range of training and missions to ensure the safety and security of local communities.

HP: https://www.mod.go.jp/gsdf/wae/8d

■MOTHER Bracelet®︎, Recharge-Free Smart Tracker

MOTHER Bracelet MOTHER Bracelet®︎ is the world's first* 24/7 recharge-free smart tracker, powered by advanced technology from a Silicon Valley-based tech business that generates electricity from the temperature difference between the body and the surrounding air. As it doesn't require recharging, it eliminates the data loss that can occur when a device is taken off for charging. This single device can record five fundamental health metrics: heart rate, calories burned, body surface temperature, step count, and sleep.

Official Website: https://mother-bracelet.com

※Based on a survey of intellectual property conducted by ESP Research Institute Co., Ltd. via WIPO, PATENTSCOPE, the Japan Science and Technology Agency, J-GLOBAL, and J-PlatPat related to recharge-free activity tracker utilizing the Seebeck effect (as of July 3, 2021, based on ESP Research)

■"REMONY®", Remote Health Monitoring System

Remote Health Monitoring System REMONY

"REMONY®", a remote health monitoring system, developed by MOTHER Labs, combines the wrist-worn recharge-free smart tracker MOTHER Bracelet® with a dedicated gateway. The system enables automatic data synchronization and centralized real-time monitoring. Health monitoring with conventional wearables often faces challenges due to data loss during the device recharge period. However, MOTHER Bracelet®

measures user vital data in real-time 24/7 without needing removal for recharging. As a result, it allows for prompt and early detection of health emergencies and accident prevention with high accuracy. The system is customizable for use in various industries, including elder care, health monitoring for night shift workers, etc.

Features:

• Measurement and display of heart rate, calories burned, body surface temperature, step count and sleep.

• Various alert functions (fall detection, abnormal heart rate, heatstroke, SOS call, etc.).

• Automatic notification functions linked to alerts.

Company Overview

■ABOUT MEDIROM MOTHER Labs Inc.

MOTHER Labs is a subsidiary of MEDIROM Healthcare Technologies Inc. (NASDAQ: MRM) with a focus on the health-tech sector. The company’s core activities include the “Specific Health Guidance Program” offered through the “Lav” health application and the development and sales of the 24/7 recharge-free MOTHER Bracelet smart tracker. By leveraging the features of the recharge-free MOTHER Bracelet, MOTHER Labs offers customizable health monitoring solutions across diverse sectors, including caregiving, logistics, manufacturing, etc.

In addition, through the operation of “Re.Ra.Ku PRO,” a running station designed to support the health monitoring of runners, the company provides healthcare services that integrate real-world engagement with technology.

■MEDIROM Healthcare Technologies Inc.

MEDIROM Healthcare Technologies Inc.

NASDAQ Symbol: MRM

Tradepia Odaiba, 2-3-1 Daiba, Minato-ku, Tokyo, Japan

Web: https://medirom.co.jp/en

Contact: [email protected]