v3.25.2
Goodwill and intangible assets - Additional Information (Detail) - JPY (¥)
¥ in Millions
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2023
Statements [Line Items]      
Goodwill ¥ 1,508,721 ¥ 1,487,100 ¥ 1,275,112
Growth rate 3.50% 3.50%  
Game & Network Services [member]      
Statements [Line Items]      
Goodwill ¥ 460,621 ¥ 465,647  
Intangible assets with indefinite useful life ¥ 57,434 ¥ 57,438  
Growth rate 2.00% 1.50%  
Pre-tax discount rate 10.90% 9.60%  
Music [member]      
Statements [Line Items]      
Goodwill ¥ 729,593 ¥ 710,888  
Music [member] | Worldwide Recorded Music Cash Generating Unit [member]      
Statements [Line Items]      
Goodwill ¥ 355,985 ¥ 342,653  
Growth rate 1.00% 1.00%  
Pre-tax discount rate 12.20% 12.50%  
Music [member] | Music Publishing Cash Generating Unit [member]      
Statements [Line Items]      
Goodwill ¥ 325,590 ¥ 330,240  
Growth rate 3.00% 3.00%  
Pre-tax discount rate 11.10% 11.40%  
Pictures [member]      
Statements [Line Items]      
Goodwill ¥ 283,201 ¥ 279,949  
Pictures [member] | Animation Cash Generating Unit [member]      
Statements [Line Items]      
Goodwill ¥ 139,236 ¥ 141,155  
Pre-tax discount rate 16.40% 15.90%  
Pictures [member] | Animation Cash Generating Unit [member] | Maximum [Member]      
Statements [Line Items]      
Growth rate 12.00% 12.00%  
Pictures [member] | Animation Cash Generating Unit [member] | Minimum [Member]      
Statements [Line Items]      
Growth rate 5.00% 5.00%