Quarterly report pursuant to Section 13 or 15(d)

Short-Term Borrowings and Credit Lines (Narrative) (Details)

v3.21.2
Short-Term Borrowings and Credit Lines (Narrative) (Details)
Dec. 31, 2021
JPY (¥)
Sep. 30, 2021
USD ($)
Sep. 30, 2021
JPY (¥)
Sep. 30, 2021
CNY (¥)
Japanese Subsidiary [Member] | Unsecured And Uncommitted Credit Line1        
Line of Credit Facility [Line Items]        
Maximum borrowing capacity | $   $ 700,000,000    
Japanese Subsidiary [Member] | Unsecured And Uncommitted Credit Line2        
Line of Credit Facility [Line Items]        
Maximum borrowing capacity     ¥ 1,000,000,000  
Japanese Subsidiary [Member] | Unsecured And Uncommitted Credit Line2 | Forecast        
Line of Credit Facility [Line Items]        
Maximum borrowing capacity ¥ 1,500,000,000      
Japanese Subsidiary [Member] | Unsecured And Uncommitted Credit Line3        
Line of Credit Facility [Line Items]        
Maximum borrowing capacity     ¥ 400,000,000  
Japanese Subsidiary [Member] | Unsecured And Uncommitted Credit Lines 1, 2, And 3        
Line of Credit Facility [Line Items]        
Maximum borrowing capacity | $   18,800,000    
China Subsidiary [Member] | Unsecured And Uncommitted Line Of Credit        
Line of Credit Facility [Line Items]        
Maximum borrowing capacity       ¥ 140,000,000
China Subsidiary [Member] | Unsecured And Uncommitted Credit Line1        
Line of Credit Facility [Line Items]        
Maximum borrowing capacity | $   $ 20,000,000