Area of land held.

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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

Maturity date of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in YYYY-MM-DD format.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition

Weighted average interest rate of debt outstanding.

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No definition available.

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- Definition

Amount of unamortized loan commitment, origination, and other costs (fees) on financing receivable recognized as adjustment to yield. Excludes financing receivable covered under loss sharing agreement.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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Interest and debt related expenses associated with nonoperating financing activities of the entity.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition

Average amount borrowed under the credit facility during the period.

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No definition available.

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Fair value of the amount outstanding under the credit facility.

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Description of interest rate for borrowing under credit facility. Includes, but is not limited to, terms and method for determining interest rate.

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The effective interest rate during the reporting period.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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The interest rate applicable to the portion of the carrying amount of long-term borrowings outstanding as of the balance sheet date, including current maturities, which accrues interest at a set, unchanging rate.

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- Definition

Amount of cash inflow from contractual arrangement with the lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

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The cash outflow for the settlement of obligation drawn from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with maturities due beyond one year or the operating cycle, if longer.

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Borrowings (Details) ¥ in Millions			12 Months Ended
Borrowings (Details) ¥ in Millions	Sep. 27, 2022 USD ($)	Sep. 27, 2022 JPY (¥)	Mar. 31, 2025 USD ($) ft²	Mar. 31, 2024 USD ($)	Mar. 31, 2024 JPY (¥)	Mar. 31, 2023 USD ($)	Mar. 31, 2023 JPY (¥)	Mar. 31, 2025 JPY (¥) ft²	Sep. 22, 2023	Mar. 31, 2023 JPY (¥)
Borrowings [Line Items]
Aggregate credit line	$ 61,300,000	¥ 8,150.0
Interest rate	0.70%	0.70%
Aggregate borrowed amount						$ 61,300,000	¥ 8,150.0
Net outstanding balance			$ 2,300,000			60,600,000		¥ 340.1		¥ 8,100.0
Unamortized loan service						643,438				¥ 85.6
Maturity date			Apr. 30, 2026					Apr. 30, 2026	Mar. 29, 2024
Bears interest rate, percentage			1.20%					1.20%	1.20%
Repayment of debt (in Yen) \| ¥					¥ 300.0
Outstanding balance loan			$ 52,200,000					¥ 7,850.0
Interest rate, description			The loan bears an interest rate of TIBOR (3M)+6.0% (in the case EBITDA exceeds ¥0) or TIBOR (3M)+0.7% (in the case EBITDA is ¥0 or less).
Piece of land (in Square Feet) \| ft²			16,165					16,165
Interest expenses \| $			$ 1,566,950	$ 1,588,395		$ 2,388,870
Weighted average interest rates			1.69%	1.19%	1.19%	1.49%		1.69%		1.49%