Announcement of Subsidiary’s Release

TOKYO, December 7, 2023 – Coincheck, Inc., a subsidiary of Monex Group, Inc., issued the followingpress release today.

Attachment: Summary of Coincheck, Inc. press release
Notice of Listing Avalanche (AVAX)

Contact:

Akiko Kato
Corporate Communications OfficeMonex Group, Inc.
+81-3-4323-8698

Yuki Nakano, Taishi Komori
Investor Relations, Financial Control Department
Monex Group, Inc.
+81-3-4323-8698

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

【Press Release】

December 7, 2023
Coincheck, Inc.

Notice of Listing Avalanche (AVAX)Coincheck, Inc. (Headquartered in Shibuya-ku, Tokyo; Satoshi Hasuo, Representative
Director; hereinafter "Coincheck") hereby announces Avalanche (AVAX) listing onits crypto asset trading service “Coincheck” from December 7, 2023.

Avalanche is an open-source platform designed for developing DApps (DecentralizedApplications) with a focus on supporting global financial transactions, fast
processing speed, and development flexibility.
We have decided to start handling Avalanche (AVAX) as part of our productdevelopment policy to increase the amount of people who are connected toCoincheck.

Comment From Roi Hirata (Ava Labs / Head of Japan)
We are excited to announce that AVAX is now tradable on Coincheck, a platform thathas a large and active user base. Our aim is to make AVAX as a crypto asset more accessible to a wider user base. We are thrilled to bring Avalanche's cutting-edge
technology and innovation to more users in Japan through Coincheck.

Comment From Shuhei Sawamura (Coincheck, Inc. /Director of Crypto Asset Business Division)

Executive Director,

I am pleased to announce the listing of AVAX. AVAX stands out not only for its
rapid processing speed and low transaction costs but also for its highly scalable
blockchain infrastructure that features a subnet-like structure. This advancedtechnology can be used to create significant value. We are aware that thechallenge is now underway.
Coincheck continues to support all pioneers who are trying to create substantial
value in the world with Crypto technology, such as by handling AVAX.

Details of Avalanche (AVAX) Listing
Schedule of listing: Afternoon, December 7, 2023

About Avalanche (ticker symbol: AVAX)
Avalanche (AVAX) is the native token of Avalanche, an open-source platform forbuilding DApps (Decentralized Applications).
Avalanche (AVAX) is used to pay transaction fees and as the base unit of an account.
Currency unit:
AVAX
Maximum supply:
720,000,000 AVAX
Consensus algorithms:
Avalanche Consensus
Market value ranking (as of December 5, 2023): 13th (Source: CoinMarketCap)
URL：https://www.avax.network/
Service details:- Remitting, receiving, purchasing and selling on both Coincheck (WEB) andCoincheck App- Coincheck Marketplace (*1)
- Coincheck Lending Services- Coincheck Periodic Purchase Services*1 AVAX is not available on Coincheck Exchange at the time of listing.

About Coincheck
Coincheck, Inc. operates the crypto asset trading service "Coincheck," which has
been "Japan's No.1*" downloaded trading app for four consecutive years. The

company's mission is "Making Exchange of New Value Easier" by providing better
services based on the latest technology and advanced security measures. Coincheckaims to make the "exchange of new value" created by crypto assets and blockchain
more easily accessible to its customers.
*This data is supported by App Tweak and refers to domestic crypto asset trading apps from January
2019 to December 2022.

For inquiries from the press regarding this release, please contactCoincheck, Inc. PR Group
Mail: pr@coincheck.com