Document And Entity Information - shares	3 Months Ended
	Jun. 30, 2021	Aug. 12, 2021
Document Information Line Items
Entity Registrant Name	Jerash Holdings (US), Inc.
Trading Symbol	JRSH
Document Type	10-Q
Current Fiscal Year End Date	--03-31
Entity Common Stock, Shares Outstanding		11,334,318
Amendment Flag	false
Entity Central Index Key	0001696558
Entity Current Reporting Status	Yes
Entity Filer Category	Non-accelerated Filer
Document Period End Date	Jun. 30, 2021
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q1
Entity Small Business	true
Entity Emerging Growth Company	true
Entity Shell Company	false
Entity Ex Transition Period	true
Document Quarterly Report	true
Document Transition Report	false
Entity File Number	001-38474
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	81-4701719
Entity Address, Address Line One	277 Fairfield Road
Entity Address, Address Line Two	Suite 338
Entity Address, City or Town	Fairfield
Entity Address, State or Province	NJ
Entity Address, Postal Zip Code	07004
City Area Code	(214)
Local Phone Number	906-0065
Title of 12(b) Security	Common Stock, par value $0.001 per share
Security Exchange Name	NASDAQ
Entity Interactive Data Current	Yes