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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired.

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Weighted average price of options that were either forfeited or expired.

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Gross number of share options (or share units) granted during the period.

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Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

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Number of options outstanding, including both vested and non-vested options.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Fair value of options vested. Excludes equity instruments other than options, for example, but not limited to, share units, stock appreciation rights, restricted stock.

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Number of options vested.

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Weighted average grant-date fair value of options vested.

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Number of share options (or share units) exercised during the current period.

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Share-Based Compensation - Schedule of Award Activity (Details)				6 Months Ended
	Apr. 30, 2025 JPY (¥) ¥ / shares shares	Apr. 30, 2025 USD ($) $ / shares shares	Apr. 30, 2024 JPY (¥) ¥ / shares shares	Oct. 31, 2025 JPY (¥) ¥ / shares shares	Oct. 31, 2025 USD ($) $ / shares shares	Oct. 31, 2024 JPY (¥) ¥ / shares shares	Oct. 31, 2025 USD ($) $ / shares shares
2019 Plan Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Number of options, Granted
Weighted- average exercise price, Granted (in Yen per share and Dollars per share) \| (per share)
Number of options,Forfeited / Cancelled				(15,000)	(15,000)
Weighted- average exercise price, Forfeited / Cancelled (in Yen per share and Dollars per share) \| (per share)
Number of options, Outstanding	1,020,000	1,020,000	1,020,000	1,005,000	1,005,000	1,020,000
Weighted- average exercise price, Outstanding (in Yen per share and Dollars per share) \| (per share)	¥ 2	$ 0.01	¥ 2	¥ 2	$ 0.01	¥ 2
Weighted- average remaining contractual term, Outstanding	3 years 9 months 18 days	3 years 9 months 18 days	4 years 9 months 18 days	3 years 3 months 18 days	3 years 3 months 18 days	4 years 3 months 18 days
Aggregate intrinsic Value, Outstanding (in Yen and Dollars)	¥ 52.5	$ 0.3	¥ 121.4	¥ 132.6	$ 0.9	¥ 69.1
Number of options, Vested				1,005,000	1,005,000	1,020,000
Weighted- average exercise price, Vested (in Yen per share and Dollars per share) \| (per share)				¥ 2	$ 0.01	¥ 2
Weighted- average remaining contractual term, Vested				3 years 3 months 18 days	3 years 3 months 18 days	4 years 3 months 18 days
Aggregate intrinsic Value, Vested (in Yen and Dollars)				¥ 132.6	$ 0.9	¥ 69.1
Number of options, Exercisable				1,005,000		1,020,000	1,005,000
Weighted- average exercise price, Exercisable (in Yen per share and Dollars per share) \| (per share)				¥ 2		¥ 2	$ 0.01
Weighted- average remaining contractual term, Exercisable				3 years 3 months 18 days	3 years 3 months 18 days	4 years 3 months 18 days
Aggregate intrinsic Value, Exercisable (in Yen and Dollars)				¥ 132.6		¥ 69.1	$ 0.9
2019 Trust-Type Plan [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Number of options, Granted
Weighted- average exercise price, Granted (in Yen per share and Dollars per share) \| (per share)
Number of options,Forfeited / Cancelled						(1,960,000)
Weighted- average exercise price, Forfeited / Cancelled (in Yen per share and Dollars per share) \| (per share)						¥ 50
Number of options, Exercised
Weighted- average exercise price,Exercised (in Yen per share and Dollars per share) \| (per share)
Number of options, Outstanding			1,960,000
Weighted- average exercise price, Outstanding (in Yen per share and Dollars per share) \| (per share)			¥ 50
Weighted- average remaining contractual term, Outstanding			5 years 2 months 12 days
Aggregate intrinsic Value, Outstanding (in Yen and Dollars)			¥ 73.4
Number of options, Vested
Weighted- average exercise price, Vested (in Yen per share and Dollars per share) \| (per share)
Number of options, Exercisable
Weighted- average exercise price, Exercisable (in Yen per share and Dollars per share) \| (per share)