Document and Entity Information - shares	3 Months Ended
	Jun. 30, 2020	Aug. 03, 2020
Document And Entity Information
Entity Registrant Name	Achison Inc
Entity Central Index Key	0001672571
Document Type	10-Q/A
Document Period End Date	Jun. 30, 2020
Amendment Flag	true
Current Fiscal Year End Date	--03-31
Is Entity's Reporting Status Current?	Yes
Entity Shell Business	true
Entity Interactive Data	Yes
Entity Filer Category	Non-accelerated Filer
Entity Common Stock, Shares Outstanding		9,990,000
Document Fiscal Period Focus	Q1
Document Fiscal Year Focus	2021
Entity Emerging Growth Company	false
Entity Small Business	true
Amendment	This is being filed solely to correct an inadvertent error in checking the “No” box instead of the “Yes” box” on the cover page regarding the shell status of the Company as of August 4, 2020.