v3.26.1
Document And Entity Information
 12 Months Ended
Mar. 31, 2026
shares
Document Information Line Items  
Entity Central Index Key 0002070954
Document Type 20-F
Document Registration Statement false
Document Annual Report true
Current Fiscal Year End Date --03-31
Document Period End Date Mar. 31, 2026
Document Fiscal Year Focus 2026
Document Transition Report false
Document Shell Company Report false
Entity File Number 001-42989
Entity Registrant Name SMJ International Holdings Inc.
Entity Incorporation, State or Country Code E9
Entity Address, Address Line One 31 Jurong Port Road
Entity Address, Address Line Two #02-20 Jurong Logistics Hub
Entity Address, Country SG
Entity Address, City or Town Singapore
Entity Address, Postal Zip Code 619115
Title of 12(b) Security Class A Ordinary Shares
Trading Symbol SMJF
Security Exchange Name NYSE
Entity Well-known Seasoned Issuer No
Entity Voluntary Filers No
Entity Current Reporting Status Yes
Entity Interactive Data Current Yes
Entity Filer Category Non-accelerated Filer
Entity Emerging Growth Company true
Entity Ex Transition Period false
ICFR Auditor Attestation Flag false
Document Financial Statement Error Correction [Flag] false
Document Accounting Standard U.S. GAAP
Entity Shell Company false
Auditor Opinion [Text Block]

Opinion on the Financial Statements 

  

We have audited the accompanying consolidated balance sheets of SMJ International Holdings Inc. and its subsidiaries (collectively, the “Company”) as of March 31, 2026, and 2025, and the related consolidated statements of operations and comprehensive income, consolidated statements of changes in shareholders’ equity, and consolidated statements of cash flows for each of the three years in the period ended March 31, 2026, and the related notes (collectively referred to as the “financial statements”). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Company as of March 31, 2026, and 2025, and the results of its operations and its cash flows for each of the three years in the period ended March 31, 2026, in conformity with accounting principles generally accepted in the United States of America. 
Auditor Name Assentsure PAC
Auditor Location Singapore
Auditor Firm ID 6783
Amendment Flag false
Document Fiscal Period Focus FY
Business Contact  
Document Information Line Items  
Entity Address, Address Line One 31 Jurong Port Road
Entity Address, Address Line Two #02-20 Jurong Logistics Hub
Entity Address, Country SG
Entity Address, City or Town Singapore
Entity Address, Postal Zip Code 619115
Contact Personnel Name Rena Ho
City Area Code +65
Local Phone Number 6261-1212
Contact Personnel Email Address renaho@smjf.com.sg
Class A Ordinary Shares  
Document Information Line Items  
Entity Common Stock, Shares Outstanding 14,937,500
Class B Ordinary Shares  
Document Information Line Items  
Entity Common Stock, Shares Outstanding 12,767,500