Company: CNCKW
Filing Date: 2025-05-13
Form Type: 6-K
Source: 0001213900-25-042255
Chunk: 0

Company: Coincheck Group N.V.
Filing Date: 2025-05-13
Form: 6-K
Chunk 0
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<div align='center'>UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, DC 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 May 2025

Commission File Number: 001-42438

COINCHECK GROUP N.V.

(Translation of registrant’s name into English)

Nieuwezijds Voorburgwal 162

1012 SJ Amsterdam

The Netherlands

(Address of principal executive offices)</div>

Indicate by check mark whether the registrant
files or will file annual reports under cover of Form 20-F or Form 40-F:

<div align='center'>Form 20-F ☒
Form 40-F ☐</div>

On May 13, 2025, Coincheck Group N.V. (“Coincheck
Group”) issued a press release, announcing its financial results for its fourth quarter and year ended March 31, 2025, which is
furnished as Exhibit 99.1 to this Report on Form 6-K.

The information in this Report on Form 6-K is
incorporated by reference into Coincheck Group’s Registration Statement on Form S-8 (File No. 333-286190), to the extent not superseded
by documents or reports subsequently filed or furnished.

<div align='center'>EXHIBIT INDEX</div>

<div align='center'>1

SIGNATURES</div>

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: May 13, 2025 | COINCHECK GROUP N.V. 
 By:                  | /s/ Gary A. Simanson |                                       |
|:-------------------|:---------------------|:---------------------|:--------------------------------------|
|                    |                      | Name:                | Gary A. Simanson                      |
|                    |                      | Title:               | Chief Executive Officer and President |

<div align='center'>2</div>