v3.26.1
Income Taxes (Details Narrative) - JPY (¥)
12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2024
Effective Income Tax Rate Reconciliation [Line Items]      
Income tax expense
Net operating loss carryforwards ¥ 1,224,905,000 ¥ 675,207,000  
Operating loss carryforwards limitations on use expire between 2033 to 2036 expire between 2033 to 2036  
Increase or decrease uncertain tax positions ¥ 0 ¥ 0 0
JAPAN      
Effective Income Tax Rate Reconciliation [Line Items]      
Income tax expense ¥ (1,489,414,000) ¥ (534,685,000) ¥ (661,966,000)
Income taxes statutory rate 31.52% 30.62% 30.62%