Castle J (MCND) Profile and Facts Castle J (캐슬제이) is a South Korean singer, member of boy group MCND, under TOP Media. Stage Name: Castle J (캐슬제이) Birth Name: Son Seong Jun (손성준) Position: Leader, Main Rapper, Lead Dancer Birthday: May 31st, 1999 Zodiac Sign: Gemini Height: 176 cm (5’9.2″) Weight: 60 kg (132 lbs) Blood Type: O Nationality: Korean Castle J Facts: – … Continue reading Castle J (MCND) Profile and Facts