Coincheck Group B.V. Announces Submission of Confidential Draft Registration Statement
on Form F-4 with respect to Proposed Business Combination and a De-SPAC with ThunderBridge Capital Partners IV, Inc.

TOKYO, April 5, 2022 - Coincheck Group B.V. (headquarters: Amsterdam, Netherlands; Managing
Director: Akira Inoue; “CCG”), which will become a holding company of Coincheck, Inc.
(headquarters: Tokyo, Japan; Representative Director & President: Satoshi Hasuo; “Coincheck”),
and Thunder Bridge Capital Partners Ⅳ, Inc. (headquarters: Virginia, United States; President &CEO: Gary Simanson; “THCP”), a special purpose acquisition company (“SPAC”) listed on theNasdaq Global Market (Nasdaq), have submitted a confidential draft of a Registration Statement onForm F-4 to the U.S. Securities and Exchange Commission (the “SEC”) on April 4, 2022 (EST) withrespect to their previously announced proposed business combination.
As previously announced in the press release on March 22, 2021, “Coincheck Group B.V. to become
public on the Nasdaq through a De-SPAC with Thunder Bridge Capital Partners IV, Inc.,” CCG andTHCP executed a definitive business combination agreement through which CCG will become apublicly traded, Nasdaq-listed company under the ticker symbol “CNCK” (the “Transaction”).
Completion of the Transaction, which is expected to close in the second half of 2022, is subject toapproval by THCP’s shareholders, the Registration Statement being declared effective by the SEC,and satisfaction or waiver of other customary closing conditions identified in the businesscombination agreement. CCG expects to have an estimated implied equity value before theTransaction of approximately US$1.25 billion (the total market value of the shares of Coincheck,
which will be a wholly-owned subsidiary of CCG) plus potential earn-out (price adjustment)
consideration equal to a maximum of 50 million shares, which is valued at US$500 million (assume
US$10 per share, which will be the initial share price for CCG shares).

Contact:

Akiko Kato

Yuki Nakano, Minaka Aihara

Corporate Communications Office

Investor Relations, Financial Control Department

Monex Group, Inc., +81-3-4323-8698

Monex Group, Inc., +81-3-4323-8698

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Important Information About the Business Combination and Where to Find It

In connection with the proposed business combination, CCG intends to file a registration statement on Form F-4 that will include apreliminary proxy statement to be distributed to stockholders of THCP in connection with THCP’s solicitation of proxies for the voteby its stockholders with respect to the proposed business combination. After the registration statement has been filed and declaredeffective by the U.S. Securities and Exchange Commission (“SEC”), THCP will mail a definitive proxy statement / prospectus to its
stockholders as of the record date established for voting on the proposed business combination and the other proposals regarding theproposed business combination set forth in the proxy statement. CCG or THCP may also file other documents with the SEC regarding
the proposed business combination. Before making any investment or voting decision, stockholders and other interested persons areadvised to read, when available, the registration statement and preliminary proxy statement / prospectus and any amendments thereto,and the definitive proxy statement / prospectus in connection with THCP’s solicitation of proxies for the special meeting to be held toapprove the transactions contemplated by the proposed business combination because these materials will contain important
information about CCG, Coincheck, THCP and the proposed transaction. Stockholders will also be able to obtain a copy of thepreliminary proxy statement / prospectus and the definitive proxy statement / prospectus once they are available, without charge, at
the SEC’s website at www.sec.gov, or by directing a request to: Thunder Bridge Capital Partners IV, Inc., 9912 Georgetown Pike,
Suite D203, Great Falls, VA 22066.

Participants in the Solicitation

CCG, Coincheck and THCP and their respective directors and officers may be deemed participants in the solicitation of proxies ofTHCP’s stockholders in connection with the proposed business combination. THCP’s stockholders and other interested persons may
obtain, without charge, more detailed information regarding the directors and officers of Coincheck and THCP at Coincheck’s website
at corporate.coincheck.com, or in THCP’s registration statement on Form S-1 filed on June 21, 2021, respectively.

Information regarding the persons who may, under SEC rules, be deemed participants in the solicitation of proxies to THCP’sstockholders in connection with the proposed transaction will be set forth in the proxy statement / prospectus for the transaction whenavailable. Additional information regarding the interests of participants in the solicitation of proxies in connection with the proposedtransaction will be included in the proxy statement / prospectus filed with the SEC in connection with the proposed businesscombination.

Forward-Looking Statements

This document includes “forward looking statements” within the meaning of the “safe harbor” provisions of the United States Private
Securities Litigation Reform Act of 1995, that reflects the current views with respect to, among other things, the future operations andfinancial performance of the Company, THCP, Coincheck and CCG. Forward-looking statements may be identified by the use ofwords such as “forecast,” “intend,” “seek,” “target,” “anticipate,” “believe,” “could,” “continue,” “expect,” “estimate,” “may,” “plan,”“outlook,” “future,” and “project” and other similar expressions that predict or indicate future events or trends or that are not statementsof historical matters. Such forward looking statements include, but not limited to, estimated financial information. Such forward
looking statements with respect to revenues, earnings, performance, strategies, prospects and other aspects of the businesses of the2Company, THCP, Coincheck, or CCG after completion of the proposed business combination are based on current expectations thatare subject to risks and uncertainties. No assurance can be given that future developments affecting Company, THCP, Coincheck or
CCG will be those that are anticipated. Actual results may differ materially from current expectations due to changes in global, regionalor local economic, business, competitive, market, regulatory and other factors, many of which are beyond the control of the Company,
CCG, THCP and Coincheck. Should one or more of these risks or uncertainties materialize, or should any of the assumptions proveincorrect, actual results may vary in material respects from those projected in these forward-looking statements. A number of factors
could cause actual results or outcomes to differ materially from those indicated by such forward looking statements. These factors
include, but are not limited to: (1) the occurrence of any event, change or other circumstances that could give rise to the terminationof the Business Combination Agreement (the “Agreement”) and the proposed business combination contemplated thereby; (2) theinability to complete the transactions contemplated by the Agreement due to the failure to obtain approval of the stockholders of THCPor other conditions to closing in the Agreement; (3) the ability to meet Nasdaq’s listing standards following the consummation of thetransactions contemplated by the Agreement; (4) the risk that the proposed transaction disrupts current plans and operations ofCoincheck as a result of the announcement and consummation of the transactions described herein; (5) the ability to recognize theanticipated benefits of the proposed business combination, which may be affected by, among other things, competition, the ability of
CCG to grow and manage growth profitably, maintain relationships with customers and business partners and retain its management
and key employees; (6) costs related to the proposed business combination; (7) changes in applicable laws or regulations; (8) thepossibility that Coincheck may be adversely affected by other economic, business, and/or competitive factors; and (9) other risks anduncertainties indicated from time to time in other documents filed or to be filed with the SEC by THCP or CCG. The Company
cautions that the foregoing list of factors is not exhaustive. The recipient of this material should not place undue reliance upon any
forward-looking statements, which speak only as of the date made. The Company, CCG, THCP and Coincheck undertake nocommitment to update or revise the forward-looking statements, whether as a result of new information, future events or otherwise,
except as may be required by law.

This material is an English translation of a Japanese announcement made on the date above. Although the Company intended tofaithfully translate the Japanese document into English, the accuracy and correctness of this English translation is not guaranteed andthus you are encouraged to refer to the original Japanese document. This translation was made as a matter of record only and does notconstitute an offer to sell or to solicit an offer to buy securities in the U.S.

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