FUKUOKA, Japan, Aug. 15, 2025 — rYojbaba Co., Ltd. (Nasdaq: RYOJ) (“rYojbaba” or the “Company”), a Japanese enterprise specializing in labor consulting and health services, today announced the successful completion of its initial public offering (IPO) of 1,250,000 Japanese common shares. The shares were offered at a public price of US$4.00 each, generating total gross proceeds of US$5 million before the deduction of underwriting discounts and other offering-related expenses payable by rYojbaba. rYojbaba’s Japanese common shares commenced trading on the Nasdaq Capital Market on August 14, 2025, under the stock symbol “RYOJ”.

Additionally, rYojbaba has granted the underwriters a 45-day option to acquire up to an extra 187,500 Common Shares at the public offering price per share, minus the underwriting discount, to address any potential over-allotments.

rYojbaba plans to utilize the net proceeds from the offering primarily for working capital and general corporate purposes. These uses may include establishing and enhancing an information technology (IT) platform for its labor consulting services, recruiting more consultants, expanding the consulting business internationally, and growing its osteopathic clinics and beauty salons through mergers and acquisitions and franchising strategies.

D. Boral Capital LLC (“D. Boral”) served as the lead book-running manager for the offering. Sutter Securities, Inc. functioned as co-underwriter, and Boustead Securities, LLC provided financial advisory services for the offering.

Anthony, Linder & Cacomanolis, PLLC served as U.S. legal counsel to rYojbaba, and Bevilacqua PLLC acted as U.S. legal counsel to D. Boral for the offering.

A registration statement on Form F-1, as amended (File No. 333-281225), concerning the Japanese common shares offered and sold in this offering, was submitted to the U.S. Securities and Exchange Commission (“SEC”) and received effectiveness approval from the SEC on July 31, 2025. This offering is exclusively conducted through a prospectus. A final prospectus related to the offering was filed with the SEC on August 14, 2025, and can be accessed on the SEC’s website at . A copy of the final prospectus related to the offering can be obtained from D. Boral Capital LLC, 590 Madison Ave., 39th Floor, New York, NY 10022, by telephone: (212) 970-5150, or by email at: .

This press release does not constitute an offer to sell or a solicitation to purchase, nor will any sale occur for these securities in any state or jurisdiction where such offer, solicitation, or sale would be illegal without prior registration or qualification under the securities laws of that state or jurisdiction.

About rYojbaba Co., Ltd.
rYojbaba is engaged in labor consulting and health services. Its labor consulting division provides strategic advisory services for both Japanese companies and labor unions, aiming to address discrepancies in Japan’s labor culture and provide solutions for workplace dissatisfactions. Within its health services division, rYojbaba also runs 28 osteopathic clinics and 2 beauty salons across Japan, which predominantly provides judo theory, a Japanese osteopathic medical practice. To learn more, visit .

Forward-Looking Statements
This announcement contains certain forward-looking statements. These forward-looking statements are subject to known and unknown risks and uncertainties and are derived from the Company’s current expectations, including, yet not limited to, information regarding the allocation of proceeds. Such statements are often identifiable by terms like “approximates,” “believes,” “hopes,” “expects,” “anticipates,” “estimates,” “projects,” “intends,” “plans,” “will,” “would,” “should,” “could,” “may” or other similar expressions. While the Company deems these forward-looking expectations rational, there is no guarantee they will materialize as anticipated. Investors are advised that actual outcomes could significantly vary from projections and are urged to review the risk factors detailed in the Company’s final prospectus and other SEC filings prior to making investment decisions concerning its securities. The Company assumes no public obligation to amend or update any forward-looking statements to reflect subsequent events, circumstances, or shifts in expectations, unless legally mandated.

Investor Relations
John Yi and Steven Shinmachi
Gateway Group, Inc.
949-574-3860