Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

Document And Entity Information

Document And Entity Information - shares
12 Months Ended
Jan. 31, 2018
Jun. 19, 2018
Document Information [Line Items]    
Document Type 20-F  
Amendment Flag false  
Document Period End Date Jan. 31, 2018  
Document Fiscal Year Focus 2018  
Document Fiscal Period Focus FY  
Entity Registrant Name NAKED BRAND GROUP Ltd  
Entity Central Index Key 0001707919  
Current Fiscal Year End Date --01-31  
Entity Well-known Seasoned Issuer No  
Entity Voluntary Filers No  
Entity Current Reporting Status Yes  
Entity Filer Category Non-accelerated Filer  
Entity Common Stock, Shares Outstanding   22,958,378