v3.26.3
Balance Sheets (Parenthetical) - ¥ / shares
¥ / shares in Thousands
Mar. 31, 2026
Sep. 30, 2025
Statement of Financial Position [Abstract]    
Common stock, par value ¥ 0 ¥ 0
Common stock, shares authorized 16,615,220 4,615,224
Common stock, shares issued 4,153,805 1,153,806
Common stock, shares outstanding 4,153,805 1,153,806