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Document and Entity Information - shares	6 Months Ended
	Sep. 30, 2018	Nov. 07, 2018
Document and Entity Information:
Entity Registrant Name	RIVERVIEW BANCORP INC
Entity Central Index Key	0001041368
Trading Symbol	rvsb
Current Fiscal Year End Date	--03-31
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		22,598,712
Document Type	10-Q
Document Period End Date	Sep. 30, 2018
Amendment Flag	false
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q2
Entity Small Business	false
Entity Emerging Growth Company	false

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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