v3.26.1
Cover Page
 12 Months Ended
Mar. 31, 2026
shares
Document Information [Line Items]  
Document Type 20-F
Document Annual Report true
Amendment Flag false
Document Transition Report false
Document Fiscal Year Focus 2026
Document Fiscal Period Focus FY
Current Fiscal Year End Date --03-31
Document Period End Date Mar. 31, 2026
Entity Well-known Seasoned Issuer Yes
Entity Voluntary Filers No
Entity Current Reporting Status Yes
Entity Interactive Data Current Yes
Entity Registrant Name Nomura Holdings, Inc.
Entity Central Index Key 0001163653
Document Accounting Standard U.S. GAAP
Entity Filer Category Large Accelerated Filer
Entity Emerging Growth Company false
Entity Shell Company false
Document Shell Company Report false
Entity Address, Address Line One 13-1, Nihonbashi 1-chome
Entity Address, City or Town Chuo-ku
Entity Address, Postal Zip Code 103-8645
Entity File Number 1-15270
Entity Incorporation, State or Country Code M0
Entity Address, Country JP
Document Registration Statement false
Entity Common Stock, Shares Outstanding 2,901,337,224
ICFR Auditor Attestation Flag true
Auditor Name Ernst & Young ShinNihon LLC
Auditor Firm ID 789
Auditor Location Tokyo, Japan
Document Financial Statement Error Correction [Flag] false
ADS [Member]  
Document Information [Line Items]  
Trading Symbol NMR
Title of 12(b) Security American Depositary Shares
Security Exchange Name NYSE
Common Stock [Member]  
Document Information [Line Items]  
Title of 12(b) Security Common Stock
Security Exchange Name NYSE
No Trading Symbol Flag true
Business Contact [Member]  
Document Information [Line Items]  
Entity Address, Address Line One 13-1, Nihonbashi 1-chome
Entity Address, City or Town Chuo-ku
Entity Address, Postal Zip Code 103-8645
Entity Address, Country JP
Contact Personnel Name Hiroyuki Moriuchi
City Area Code 3
Country Region 81
Local Phone Number 5255-1000