Document and Entity Information	9 Months Ended
	Dec. 31, 2019 shares
Document And Entity Information
Entity Registrant Name	Achison Inc
Entity Central Index Key	0001672571
Document Type	10-Q
Document Period End Date	Dec. 31, 2019
Amendment Flag	false
Current Fiscal Year End Date	--03-31
Is Entity's Reporting Status Current?	Yes
Entity Shell Business	false
Entity Interactive Data	No
Entity Filer Category	Non-accelerated Filer
Entity Common Stock, Shares Outstanding	9,990,000
Document Fiscal Period Focus	Q3
Document Fiscal Year Focus	2020
Entity Emerging Growth Company	false
Entity Small Business	true