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INVESTMENTS - Realized Gain On Sale Of Stock (Details) - EBP Japan - JPY (¥)
12 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2024
EBP, Schedule of Asset Held for Investment [Line Items]      
Proceeds on sale of shares ¥ 3,029,689,690 ¥ 3,592,011,406 ¥ 3,692,450,006
Cost 3,202,696,961 3,522,418,823 3,549,892,766
Realized fair value gain (loss) ¥ (173,007,271) ¥ 69,592,583 ¥ 142,557,240