SEC Form 6-K filed by rYojbaba Co. Ltd.

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 December 2025

Commission File Number: 001-42781

rYojbaba Co., Ltd.

4-3-1, Ohashi, Minami-Ku

Fukuoka-Shi, Fukuoka, 815-0033, 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

rYojbaba Co., Ltd. (the “Company”) is furnishing this Report on Form 6-K to provide information concerning a recent business development.

On December 2, 2025, the Company issued a press release titled “rYojbaba Announces the Launch of AI-Powered Worker Risk Intelligence Platform.” A copy of this press release is furnished as Exhibit 99.1 to this Report on Form 6-K and is incorporated herein by reference.

This Report on Form 6-K and the information contained herein shall be deemed to be furnished and not filed for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the ‘Exchange Act’), or otherwise subject to the liabilities of that section, and shall not be incorporated by reference into any filing under the Securities Act of 1933 or the Exchange Act, except as shall be expressly set forth” by specific reference in such a filing.

EXHIBIT INDEX

SIGNATURE

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.

Date: December 2, 2025