[6-K] J-Star Holding Co., Ltd. Current Report (Foreign Issuer)

Rhea-AI Filing Summary

J-Star Holding Co., Ltd. filed a Form 6-K furnishing materials for its upcoming general meeting of shareholders. The submission includes a Notice of General Meeting scheduled for December 9, 2025, a Form of Proxy Card, and a Form of Fifth Amended and Restated Memorandum and Articles of Association. These materials outline meeting logistics and proposed corporate governance documents that shareholders will consider and vote on.

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 November 2025.

Commission File Number 001-42767

J-Star Holding Co., Ltd.

(Translation of registrant’s name into English)

7/F-1, No. 633, Sec. 2, Taiwan Blvd.,

Xitun District, Taichung City 407,

Taiwan (R.O.C.)

(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

J-Star Holding Co., Ltd. furnishes under the cover of Form 6-K the following in connection with the general meeting of its shareholders.

Exhibits

Exhibit No.		Description
99.1		Notice of General Meeting of the Shareholders of J-Star Holding Co., Ltd., to be held on December 9, 2025.
99.2		Form of Proxy Card
99.3		Form of Fifth Amended and Restated Memorandum and Articles of Association

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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.

Date: November 12, 2025	J-Star Holding Co., Ltd.
	By:	/s/ Sam Van
	Name:	Sam Van
	Title:	Chief Executive Officer

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FAQ

What did J-Star Holding (YMAT) file on Form 6-K?

The company furnished materials related to its general shareholders meeting, including the meeting notice, a proxy card, and a form of Fifth Amended and Restated Memorandum and Articles of Association.

When is J-Star Holding’s shareholder meeting?

The general meeting of shareholders is scheduled for December 9, 2025.

Which exhibits are included with the filing?

Exhibit 99.1 is the meeting notice, Exhibit 99.2 is the proxy card, and Exhibit 99.3 is the form of the Fifth Amended and Restated Memorandum and Articles of Association.

What is the purpose of the proxy card in this filing?

The proxy card enables shareholders to appoint a proxy to vote their shares at the general meeting.

What corporate document is proposed for update?

A Fifth Amended and Restated Memorandum and Articles of Association is included in form for shareholder consideration.

Is this Form 6-K tied to financial results?

No. The filing relates to shareholder meeting materials and proposed governance documents.