Summary of Significant Principles (Policies)	9 Months Ended
Dec. 31, 2021
Accounting Policies [Abstract]
Derivative Financial Instruments	Derivative Financial Instruments Derivative financial instruments, as defined in ASC 815, “Accounting for Derivative Financial Instruments and Hedging Activities”, consist of financial instruments or other contracts that contain a notional amount and one or more underlying variables (e.g. interest rate, security price or other variable), require no initial net investment and permit net settlement. Derivative financial instruments may be free-standing or embedded in other financial instruments. Further, derivative financial instruments are initially, and subsequently, measured at fair value and recorded as liabilities or, in rare instances, assets. We do not use derivative financial instruments to hedge exposures to cash-flow, market or foreign-currency risks. However, during the second quarter of fiscal 2022, we issued financial instruments including convertible promissory notes payable with embedded conversion features that do not afford equity classification. As required by ASC 815, these embedded conversion options are required to be carried as derivative liabilities, at fair value, in our financial statements (See Note 8). During the third quarter of fiscal 2022, these derivatives were satisfied. When derivative treatment is determined, we estimate the fair value of the bifurcated embedded conversion features using a Stock Path Monte Carlo Simulation model. Estimating fair values of derivative financial instruments requires the development of significant and subjective estimates (such as volatility, estimated life and risk-free rates of return) that may, and are likely to, change over the duration of the instrument with related changes in internal and external market factors. In addition, option-based techniques are highly volatile and sensitive to changes in the trading market price of our common stock, which has a high-historical volatility.
Income Taxes	Income Taxes We are required to file federal and state income tax returns in the United States. The preparation of these tax returns requires us to interpret the applicable tax laws and regulations in effect in such jurisdictions, which could affect the amount of tax paid by us. In consultation with our tax advisors, we base our tax returns on interpretations that are believed to be reasonable under the circumstances. The tax returns, however, are subject to routine reviews by the various federal and state taxing authorities in the jurisdictions in which we file tax returns. As part of these reviews, a taxing authority may disagree with respect to the income tax positions taken by us (“uncertain tax positions”) and, therefore, may require us to pay additional taxes. As required under applicable accounting rules, we accrue an amount for our estimate of additional income tax liability, including interest and penalties, which we could incur as a result of the ultimate or effective resolution of the uncertain tax positions. We account for income taxes using the asset and liability method. Under the asset and liability method, deferred tax assets and liabilities are recognized for the future tax consequences attributed to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences and carry-forwards are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date. A valuation allowance is established when necessary to reduce deferred tax assets to amounts expected to be realized. In assessing the realization of deferred tax assets, management considers whether it is more likely than not that some portion or all of the deferred tax assets will be realized. The ultimate realization of deferred tax assets is dependent upon the generation of future taxable income during the periods in which those temporary differences become deductible. Management considers the scheduled reversal of deferred tax liabilities, projected future taxable income and tax planning strategies in making this assessment. ROCKETFUEL BLOCKCHAIN, INC. NOTES TO FINANCIAL STATEMENTS DECEMBER 31, 2021 (UNAUDITED)

Summary of Significant Principles (Policies)

9 Months Ended

Dec. 31, 2021

Derivative Financial Instruments

Derivative financial instruments, as defined in ASC 815, “Accounting for Derivative Financial Instruments and Hedging Activities”, consist of financial instruments or other contracts that contain a notional amount and one or more underlying variables (e.g. interest rate, security price or other variable), require no initial net investment and permit net settlement. Derivative financial instruments may be free-standing or embedded in other financial instruments. Further, derivative financial instruments are initially, and subsequently, measured at fair value and recorded as liabilities or, in rare instances, assets.

We do not use derivative financial instruments to hedge exposures to cash-flow, market or foreign-currency risks. However, during the second quarter of fiscal 2022, we issued financial instruments including convertible promissory notes payable with embedded conversion features that do not afford equity classification. As required by ASC 815, these embedded conversion options are required to be carried as derivative liabilities, at fair value, in our financial statements (See Note 8). During the third quarter of fiscal 2022, these derivatives were satisfied.

When derivative treatment is determined, we estimate the fair value of the bifurcated embedded conversion features using a Stock Path Monte Carlo Simulation model. Estimating fair values of derivative financial instruments requires the development of significant and subjective estimates (such as volatility, estimated life and risk-free rates of return) that may, and are likely to, change over the duration of the instrument with related changes in internal and external market factors. In addition, option-based techniques are highly volatile and sensitive to changes in the trading market price of our common stock, which has a high-historical volatility.

Income Taxes

Income Taxes

We are required to file federal and state income tax returns in the United States. The preparation of these tax returns requires us to interpret the applicable tax laws and regulations in effect in such jurisdictions, which could affect the amount of tax paid by us. In consultation with our tax advisors, we base our tax returns on interpretations that are believed to be reasonable under the circumstances. The tax returns, however, are subject to routine reviews by the various federal and state taxing authorities in the jurisdictions in which we file tax returns. As part of these reviews, a taxing authority may disagree with respect to the income tax positions taken by us (“uncertain tax positions”) and, therefore, may require us to pay additional taxes. As required under applicable accounting rules, we accrue an amount for our estimate of additional income tax liability, including interest and penalties, which we could incur as a result of the ultimate or effective resolution of the uncertain tax positions. We account for income taxes using the asset and liability method. Under the asset and liability method, deferred tax assets and liabilities are recognized for the future tax consequences attributed to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences and carry-forwards are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date. A valuation allowance is established when necessary to reduce deferred tax assets to amounts expected to be realized.

In assessing the realization of deferred tax assets, management considers whether it is more likely than not that some portion or all of the deferred tax assets will be realized. The ultimate realization of deferred tax assets is dependent upon the generation of future taxable income during the periods in which those temporary differences become deductible. Management considers the scheduled reversal of deferred tax liabilities, projected future taxable income and tax planning strategies in making this assessment.

ROCKETFUEL BLOCKCHAIN, INC.

NOTES TO FINANCIAL STATEMENTS

DECEMBER 31, 2021

(UNAUDITED)

- Definition

Disclosure of accounting policy for income taxes, which may include its accounting policies for recognizing and measuring deferred tax assets and liabilities and related valuation allowances, recognizing investment tax credits, operating loss carryforwards, tax credit carryforwards, and other carryforwards, methodologies for determining its effective income tax rate and the characterization of interest and penalties in the financial statements.

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