Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2022	Nov. 14, 2022
Entity Listings [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2022
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q3
Document Transition Report	false
Entity Registrant Name	EMERGING MARKETS HORIZON CORP.
Entity Central Index Key	0001865533
Entity Incorporation, State or Country Code	E9
Entity File Number	001-41136
Entity Tax Identification Number	98-1607027
Entity Address, Address Line One	8th Floor, Berkeley Square House Berkeley Square
Entity Address, City or Town	London
Entity Address, Country	GB
Entity Address, Postal Zip Code	W1J 6DB
City Area Code	44
Local Phone Number	20 7647 9100
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
Entity Shell Company	true
Units [Member]
Entity Listings [Line Items]
Title of 12(b) Security	Units, each consisting of one Class A ordinary share, par value $0.0001, and one-half of one redeemable warrant to acquire one Class A ordinary share
Trading Symbol	HORIU
Security Exchange Name	NASDAQ
Class A Ordinary Shares [Member]
Entity Listings [Line Items]
Title of 12(b) Security	Class A ordinary shares included as part of the units
Trading Symbol	HORI
Security Exchange Name	NASDAQ
Entity Common Stock, Shares Outstanding		28,750,000
Redeemable Warrants [Member]
Entity Listings [Line Items]
Title of 12(b) Security	Redeemable warrants included as part of the units, each whole warrant exercisable for one Class A ordinary share at an exercise price of $11.50
Trading Symbol	HORIW
Security Exchange Name	NASDAQ
Class B Ordinary Shares [Member]
Entity Listings [Line Items]
Entity Common Stock, Shares Outstanding		7,187,500