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Financial risk management | 12 Months Ended
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Mar. 31, 2026
Financial Risk Management [Abstract] |
Financial risk management | Financial risk management The principal risks arising from financial instruments to which the Company is exposed in the course of its business activities include credit risk, and liquidity risk. Set forth below is information about the impact of each risk on the Company, policies on the identification, analysis and assessment of risk, and capital management in the Company. (1)Organizations for managing risks arising from financial instruments To limit risks that have an impact on the Company’s management within an acceptable range, risks are appropriately identified, analyzed, and assessed, and appropriate management organizations are designed to respond to each risk. The Company establishes rules for managing significant risks that affect operations. Those risks arising from financial instruments are managed in accordance with specific management policies and management structures formulated by the head of the supervisory department and approved by the executive officer in charge of the supervisory department. Regarding the risk management of the Company, each supervisory department manages the risk for each risk classification. The head of each supervisory department within each business regularly reports to the risk management department. The risk management department organizes the contents of the received reports and the related information it has collected, and reports to the risk committee. In addition, the risk management department drafts risk management regulations and systems, conducts various reviews, and supports monitoring activities. Subsequently, the overall risk management status of the Company is reported and discussed by Coincheck Parent’s Risk Committee. Based on these discussions, the chief risk officer appointed by the CEO monitors and assesses the development and operation of the Company's risk management framework and periodically reports to the board of directors. (a)Credit risk Credit risk is the risk of financial loss to the Company if a customer or counterparty to financial instrument fails to meet its contractual obligation. Credit risk arises primarily from risks related to customers and other counterparties. The carrying amounts of financial assets after impairment are presented in the consolidated statements of financial position and are the amounts of maximum exposure of the Company to financial asset credit risks. Risks relating to customer transactions Customer transactions with retail and institutional investors on the Company’s crypto-asset service providers are conducted on a pre-funded basis. Therefore the Company's exposure to credit risk in respect of customers is generally limited, although residual risks may arise in connection with operational incidents or other exceptional circumstances. The Company manages its exposure to crypto-asset service providers by setting limits on deposited crypto-asset amounts and monitoring positions on a daily basis. As a result, exposures to such counterparties are subject to defined limits; although credit risk may still arise in the event of counterparty failure, insolvency or operational disruption Risks relating to other counterparties The Company’s cash, cash equivalents and cash segregated as deposits are exposed to credit risk because they are deposited in financial institutions. Those financial institutions are highly credit worthy. Thus, although the credit risk is concentrated in a small number of counterparties, it is considered to be limited. In addition, customer accounts receivable is mainly due from credit card companies, which are payment processors, for settlement of funds from customers. There is also a concentration of credit risk related to customer accounts receivable, as the Company uses a small number of payment processors. However, since the settlement period is short, the credit risk associated with those processors is considered to be limited. As part of the risk management process, the Company evaluates the financial condition and operational reliability of financial institutions, custodians, crypto asset service providers and other counterparties prior to engagement and, subsequently, reviews them on a periodic basis. The exposure to credit risk of the Company is as follows:
| As of March 31, 2025
(In millions) | Impairment loss allowance measured at lifetime expected credit losses
| Not credit-impaired | Credit-impaired | Total
Gross carrying amount |  |  |
Cash and cash equivalents | ¥ | 8,584 |  | ¥ | — |  | ¥ | 8,584 |
Cash segregated as deposits | 51,655 |  | — |  | 51,655 |
Crypto assets held (current assets)(1) | 370 |  | — |  | 370 |
Customer accounts receivable | 1,086 |  | — |  | 1,086 |
Other financial assets(2) | 495 |  | 0 |  | 495 |
Total gross carrying amount | 62,190 |  | 0 |  | 62,190 |
Impairment loss allowance | — |  | (0) |  | (0) |
Total net carrying amount | ¥ | 62,190 |  | ¥ | 0 |  | ¥ | 62,190 |
| As of March 31, 2026
(In millions) | Impairment loss allowance measured at lifetime expected credit losses
| Not credit-impaired | Credit-impaired | Total
Gross carrying amount |  |  |
Cash and cash equivalents | ¥ | 9,458 |  | ¥ | — |  | ¥ | 9,458 |
Cash segregated as deposits | 50,024 |  | — |  | 50,024 |
Crypto assets held (current assets)(1) | 124 |  | — |  | 124 |
Customer accounts receivable | 1,422 |  | — |  | 1,422 |
Other financial assets(2) | 904 |  | 0 |  | 904 |
Total gross carrying amount | 61,932 |  | 0 |  | 61,932 |
Impairment loss allowance | — |  | (0) |  | (0) |
Total net carrying amount | ¥ | 61,932 |  | ¥ | 0 |  | ¥ | 61,931 |
____________ (1) Crypto assets held (current assets) mainly consist of crypto assets deposited with third-party exchanges. (2) Other financial assets mainly consist of deposits and guarantee deposits, as well as EURC and USDC. See Note 15 “Other financial assets.” Changes in allowance for doubtful receivables for other financial assets are as follows:
| As of March 31,
(In millions) | 2025 | 2026
Balance at beginning of period | ¥ | 0 |  | ¥ | 0 |
Increase | 0 |  | — |
Balance at end of period | ¥ | 0 |  | ¥ | 0 |
(b)Liquidity risk Liquidity risk is the risk of the Company being unable to settle obligations using cash, crypto assets held (current assets), other financial assets, or other means. The Company finances the funds necessary for operations by obtaining loans from other financial institutions and related parties. Cryptocurrencies received from borrowings, which are recorded as “Crypto asset borrowings” in the consolidated statements of financial position, contribute to securing adequate liquidity, as they can be used as the Company’s own assets or in settlement with cryptocurrency exchange brokers. The Company regularly monitors the status and outlook of cash flows and reduces liquidity risks. The maturity analysis of financial liabilities and the corresponding financial assets for managing liquidity risk are as follows. Cryptocurrencies for facilitating customer transactions are included in the following tables. The contractual cash flows below reflect cash flows presented on an undiscounted cash flow basis, including contractual interest payments. As of March 31, 2025
(In millions) | Carrying amount | Contractual cash flows | Within one year | From one year to two years | From two years to three years | From three years to four years | From four years to five years | More than five years
Crypto asset borrowings | ¥ | 44,479 |  | ¥ | 44,479 |  | ¥ | 44,479 |  | ¥ | — |  | ¥ | — |  | ¥ | — |  | ¥ | — |  | ¥ | — |
Other financial liabilities |  |  |  |  |  |  |  |
- Borrowings | 751 |  | 751 |  | 751 |  | — |  | — |  | — |  | — |  | — |
- Lease liabilities | 1,277 |  | 1,293 |  | 384 |  | 356 |  | 356 |  | 197 |  | — |  | — |
- Derivative liabilities | — |  | — |  | — |  | — |  | — |  | — |  | — |  | — |
- Other(1) | 1,698 |  | 1,698 |  | 1,698 |  | — |  | — |  | — |  | — |  | — |
Total Other financial liabilities | ¥ | 3,727 |  | ¥ | 3,742 |  | ¥ | 2,833 |  | ¥ | 356 |  | ¥ | 356 |  | ¥ | 197 |  | ¥ | — |  | ¥ | — |
Cash and cash equivalents | ¥ | 8,584 |  | ¥ | 8,584 |  | ¥ | 8,584 |  | ¥ | — |  | ¥ | — |  | ¥ | — |  | ¥ | — |  | ¥ | — |
Crypto assets held | ¥ | 44,680 |  | ¥ | 44,680 |  | ¥ | 44,680 |  | ¥ | — |  | ¥ | — |  | ¥ | — |  | ¥ | — |  | ¥ | — |
As of March 31, 2026
(In millions) | Carrying amount | Contractual cash flows | Within one year | From one year to two years | From two years to three years | From three years to four years | From four years to five years | More than five years
Crypto asset borrowings | ¥ | 37,543 |  | ¥ | 37,543 |  | ¥ | 37,543 |  | ¥ | — |  | ¥ | — |  | ¥ | — |  | ¥ | — |  | ¥ | — |
Other financial liabilities |  |  |  |  |  |  |  |
- Borrowings | 2,758 |  | 2,758 |  | 2,105 |  | 581 |  | 37 |  | 37 |  | — |  | — |
- Lease liabilities | 910 |  | 919 |  | 366 |  | 356 |  | 196 |  | — |  | — |  | — |
- Derivative liabilities | — |  | — |  | — |  | — |  | — |  | — |  | — |  | — |
- Other(1) | 2,051 |  | 2,051 |  | 2,051 |  | — |  | — |  | — |  | — |  | — |
Total Other financial liabilities | 5,720 |  | 5,729 |  | 4,522 |  | 937 |  | 233 |  | 37 |  | — |  | — |
Cash and cash equivalents | ¥ | 9,458 |  | ¥ | 9,458 |  | ¥ | 9,458 |  | ¥ | — |  | ¥ | — |  | ¥ | — |  | ¥ | — |  | ¥ | — |
Crypto assets held | ¥ | 37,876 |  | ¥ | 37,876 |  | ¥ | 37,876 |  | ¥ | — |  | ¥ | — |  | ¥ | — |  | ¥ | — |  | ¥ | — |
____________ (1) Other financial liabilities mainly consist of accrued expenses, and other payables. The Company has entered into committed borrowing lines of credit of ¥8,900 million and ¥11,054 million with Monex Finance Corporation and financial institutions to manage liquidity risk for the years ended March 31, 2025 and 2026, respectively. The purpose of the committed borrowing lines is for general business use. There were drawdowns on the committed borrowing lines of ¥751 million and ¥2,524 million as of March 31, 2025 and 2026. See Note 30 (3) “Availability under committed credit lines.” (c)Market risk Market risk is the risk of fluctuations in the fair value of cryptocurrencies or future cash flows as a result of changes in market price. The objective of market risk management is to manage and control market risk exposure within acceptable parameters, while optimizing the return. Market risk mainly includes price fluctuation risk of cryptocurrencies. The Company holds cryptocurrencies to facilitate customer transactions. The Company also monitors net open position for each cryptocurrency that is traded on its Marketplace platform. To limit the price fluctuation risk within a certain level, the Company strives to sustain its cryptocurrencies in approximately the same quantity and amount as the crypto asset borrowings. (d)Operational risk The Company is exposed to operational risk arising from a wide variety of factors associated with business processes, personnel, third party service providers, technology and infrastructure, and from external factors other than credit, liquidity, and market risks, such as changes in legal and regulatory requirements. In particular, the Company holds crypto assets for its own account (crypto assets held (current assets)) and, on behalf of its customers, in the Company’s hot or cold wallets. These wallets are administered by the Company and the Company has control of the private keys associated with them, allowing it to access and transact with the crypto assets held therein. If any of the private keys relating to the Company’s hot or cold wallets are lost, destroyed, or otherwise compromised, and no backup of the private key is accessible, the Company would lose access to crypto assets. If the Company loses access to a crypto asset held for its own account, the Company derecognizes the crypto asset held. If the Company loses access to a crypto asset held on behalf of customers, the Company may be liable to its customers for losses arising from the Company’s failure to safeguard crypto assets from theft or loss and there will be a devastating impact on the Company’s operation. Furthermore, the Company cannot provide assurance that the wallet will not be hacked or compromised. Cryptocurrency and blockchain technologies have been, and may in the future be, subject to security breaches, hacking, or other malicious activities. The customers’ ability to access or sell their cryptocurrencies could be affected adversely due to any loss of private keys relating to, or hack or other compromise of, digital wallets used to store cryptocurrencies deposited by customers. See Note 31 “Commitments and contingencies.” (e)Foreign exchange risk management Payables denominated in foreign currencies are exposed to foreign exchange risks. Our foreign exchange risks arise primarily from fluctuations in U.S. dollar, Euro, and Canadian dollar. The Company manages foreign exchange risks by continuously monitoring trends in foreign exchange rates and managing its exposure to foreign exchange rate fluctuations. (2)Capital management The fundamental principles of the Company’s capital management are to build and uphold a steady financial base for the purpose of maintaining soundness and efficiency of operations and achieving growth. According to these principles, the Company conducts capital investment, profit distribution, such as dividends, and repayment of loans based on steady operating cash flows through the development and rendering of competitive crypto asset exchange services. (a)Coincheck In line with this group-level policy, Coincheck’s capital management focuses on specific regulatory requirements in Japan. Coincheck calculates and monitors the financial soundness index at the end of each month as the record date in accordance with the “Rules on Financial Management for Crypto-Asset Exchange Service Providers” and related guidelines, which are self-regulatory rules established by the Japan Virtual and Crypto Assets Exchange Association. The financial soundness index is the ratio of the nonfixed equity amount to the sum of the market risk equivalent amount, the counterparty risk equivalent amount, and the basic risk equivalent amount, based on the calculation method stipulated in the related guidelines. (b)Aplo In line with this group-level policy and applicable regulatory frameworks, Aplo's capital management for European operations focuses on compliance with its Crypto-Asset Service Provider (CASP) and Payment Institution (PI) licenses. For the CASP license, the capital requirement is set at 25% of the fixed overhead costs from the preceding year. For the PI license, the capital requirement is determined under Method A, which is mandatory for CASPs, and corresponds to 10% of fixed overhead costs from the prior year.

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- Definition The disclosure of the entity's financial risk management practices and policies. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Note Expiry date 2027-01-01 -Name IAS -Number 1 -IssueDate 2025-01-01 -Paragraph 10 -Subparagraph e -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2025-en-b&anchor=para_10_e&doctype=Standard -URIDate 2025-03-27 + Details
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