Document and Entity Information - shares	3 Months Ended
	Jun. 30, 2020	Aug. 13, 2020
Document and Entity Information [Abstract]
Entity Registrant Name	Jerash Holdings (US), Inc.
Entity Central Index Key	0001696558
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2020
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q1
Current Fiscal Year End Date	--03-31
Entity Current Reporting Status	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Shell Company	false
Entity Emerging Growth Company	true
Entity Ex Transition Period	true
Entity File Number	001-38474
Entity Interactive Data Current	Yes
Entity Common Stock, Shares Outstanding		11,325,000
Entity Incorporation State Country Code	DE