Castle J

Name: Castle J
Native name: 캐슬제이
Also Known as: Son Sung Joon, Son Seong Joon, 손성준
Nationality: South Korean
Gender: Male
Born: May 31, 1999
Age: 27

Son Seung Jun, known professionally as Castle J, is a South Korean singer, dancer, child actor and member of MCND (엠시엔디). He graduated from Anyang Arts High School and is on a leave-of-absence at Daekyung University.

He first appeared on TV in 2009 when he was interviewed as a child star in "VJ Special Forces" (VJ특공대) and one year later, he made his debut as a child actor in the 2010 KBS2 drama special "The Last Flashman" (마지막 후뢰시맨).

He made his singing debut in February 2020 as MCND's leader, main rapper and producer with their first EP, "Into the Ice Age". The group is managed by TOP Media (티오피미디어).

(Source: MyDramaList) Edit Biography

Year	Title	#	Role	Rating
2013	The Suspicious Housekeeper Korean Drama, 2013, 20 eps [Perpetrator of bullying] (Support Role)	20	[Perpetrator of bullying] Support Role	7.7
2013	Queen's Classroom Korean Drama, 2013, 16 eps Han Guk [Student] (Support Role)	16	Han Guk [Student] Support Role	7.9
2012	A Wife’s Credentials Korean Drama, 2012, 16 eps Jo Jae Hoon (Support Role)	16	Jo Jae Hoon Support Role	7.7

Year	Title	Role	Rating
2015	Emperor's Holidays Chinese Movie, 2015, (Unknown)	Unknown	6.9

Year	Title	#	Role	Rating
2010	KBS Drama Special 2010: Last Flashman Korean Drama, 2010, 1 eps Dong Gun (Support Role)	1	Dong Gun Support Role	6.8

Year	Title	#	Role	Rating
2022	2022 Idol Star Athletics Championships Chuseok Special Korean TV Show, 2022, 3 eps (Regular Member)	3	Regular Member	7.7
2022	Midnight Idol Season 3 Korean TV Show, 2022, 50 eps (Ep. 40) (Guest)	50	(Ep. 40) Guest	7.7
2022	GEMCND Season 4 Korean TV Show, 2022, 9 eps (Main Host)	9	Main Host	8.6
2022	Secret Airlines Korean TV Show, 2022, 21 eps (Ep. 5) (Guest)	21	(Ep. 5) Guest	0.0
2022	Queendom Season 2 Korean TV Show, 2022, 10 eps (Ep. 1-2) (Guest)	10	(Ep. 1-2) Guest	7.6
2021	GEMCND Season 3 Korean TV Show, 2021, 8 eps (Main Host)	8	Main Host	8.4
2021	Show Me the Money Season 10 Korean TV Show, 2021, 10 eps [Contestant] (Regular Member)	10	[Contestant] Regular Member	8.0
2021	Midnight Idol Season 2 Korean TV Show, 2021, 150 eps (Ep. 8) (Guest)	150	(Ep. 8) Guest	8.6
2021	GEMCND Season 2 Korean TV Show, 2021, 4 eps (Main Host)	4	Main Host	8.4
2020	Idol League Season 3 Korean TV Show, 2020, 66 eps (Ep. 17) (Guest)	66	(Ep. 17) Guest	8.4
2020	MCND's Crazy School Season 3 Korean TV Show, 2020, 4 eps (Main Host)	4	Main Host	8.6
2020	Idol Dabang Season 3 Korean TV Show, 2020, 10 eps (Ep. 9) (Guest)	10	(Ep. 9) Guest	7.2
2020	GEMCND Korean TV Show, 2020, 5 eps (Main Host)	5	Main Host	8.5
2020	MCND's Crazy School Season 2 Korean TV Show, 2020, 4 eps (Main Host)	4	Main Host	8.7
2020	MCND's Crazy School Korean TV Show, 2020, 4 eps (Main Host)	4	Main Host	8.6
2020	Idol League Season 2 Korean TV Show, 2020, 23 eps (Ep. 8) (Guest)	23	(Ep. 8) Guest	7.7
2020	Let’s Play MCND Korean TV Show, 2020, 18 eps (Main Host)	18	Main Host	10.0
2019	Transonglation Korean TV Show, 2019, 67 eps (Ep. 25, 39) (Guest)	67	(Ep. 25, 39) Guest	8.3
2019	Midnight Idol Korean TV Show, 2019, 345 eps (Ep. 143, 164, 258, 304) (Guest)	345	(Ep. 143, 164, 258, 304) Guest	8.2
2019	5 Minutes to Six Korean TV Show, 2019, 425 eps (Ep. 356) (Guest)	425	(Ep. 356) Guest	8.0
2013	After School Club Korean TV Show, 2013, 671 eps (Ep. 412, 454, 489, 533, 628) (Guest)	671	(Ep. 412, 454, 489, 533, 628) Guest	7.8

Top 12 upcoming dramas on every fan's watchlist

Editorials - Sep 19, 2026

From highly anticipated adaptations to gripping thrillers, the upcoming drama lineup has something for every fan. With teasers already dropping, these 12 dramas are generating plenty of buzz even before their premieres. Here are the titles to keep on your