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Intangible Assets, Net (Tables)
 6 Months Ended
Mar. 31, 2025
Intangible Assets, Net [Abstract]  
Schedule of Intangible Assets

As of March 31, 2025 and September 30, 2024, intangible assets consisted of the following:

 

   Yen in thousands 
   As of
March 31,		   As of
September 30,		 
   2025   2024 
Participation Right  ¥123,986   ¥123,986 
Total intangible assets   123,986    123,986 
Less: Accumulated Amortization   (27,490)   (18,708)
Total intangible assets  ¥96,496   ¥105,278