O3ohn

Name: O3ohn
Native name: 오존
Also Known as: Oh John, 오준호, Ozone
Nationality: South Korean
Gender: Male
Born: March 17, 1993
Age: 33

Oh Jun Ho, known professionally as O3ohn (pronounced Ozone), is a South Korean singer-songwriter. He graduated from Gwacheon High School and he chose his stage name as it was his childhood nickname and O3 is the chemical formula for Ozone. After being discharged from his mandatory military service around 2015, he became the guitarist of his childhood friend Shin Se Ha's band called "Shin Se Ha and the Town". He later debuted as a soloist releasing his 1st EP "(O)" in 2016. He then appeared in some episodes on "Yoo Hee Yeol's Sketchbook" between 2018 and 2019 promoting his music. In 2020, he entered the singing survival show "Folk Us" and surprised the judges with his vocals and managed to earn 3rd place. In 2021, he began streaming his music online and he has also provided some OSTs for dramas such as "Jirisan", "Link", and more recently "Extraordinary Attorney Woo".

(Source: Korean = Namu Wiki || Translation = MyDramaList) Edit Biography

Year	Title	#	Role	Rating
2025	I Am Boxer Korean TV Show, 2025, 10 eps [Contestant] (Regular Member)	10	[Contestant] Regular Member	7.7
2025	The Seasons Season 8: 10CM's Pat-Pat Korean TV Show, 2025, 25 eps (Ep. 12) (Guest)	25	(Ep. 12) Guest	0.0
2025	Yoo Got a Minute? Korean TV Show, 2025, 20 eps (Ep. 16) (Guest)	20	(Ep. 16) Guest	7.9
2025	Anchovy Physical Camp Korean TV Show, 2025, 20 eps (Regular Member)	20	Regular Member	0.0
2025	Live Wire Korean TV Show, 2025, 12 eps (Ep. 3) (Guest)	12	(Ep. 3) Guest	0.0
2025	The Seasons Season 7: Park Bo Gum's Cantabile Korean TV Show, 2025, 21 eps (Ep. 15) (Guest)	21	(Ep. 15) Guest	8.3
2023	The Seasons Season 3: Long Day, Long Night with AKMU Korean TV Show, 2023, 14 eps (Ep. 4) (Guest)	14	(Ep. 4) Guest	8.2
2020	Folk Us Korean TV Show, 2020, 10 eps [Contestant] (Regular Member)	10	[Contestant] Regular Member	8.4
2018	Amazing Saturday Korean TV Show, 2018, 450 eps (Ep. 386) (Guest)	450	(Ep. 386) Guest	8.2
2017	I'm Live Korean TV Show, 2017, 451 eps (Ep. 10, 98) (Guest)	451	(Ep. 10, 98) Guest	8.0
2009	You Hee Yeol's Sketchbook Korean TV Show, 2009, 600 eps (Ep. 395-396, 425, 460) (Guest)	600	(Ep. 395-396, 425, 460) Guest	8.1
2004	EBS Space Sympathy Korean TV Show, 2004, 1700 eps (Guest)	1700	Guest	10.0

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