At the age of 12 years old, after study New Zealand for a year and a half, his auntie tells his parents that there is an empty room in her house so he moved to study in the US in the small town in California. He entered to Grade 9. At his first year there, he got GPA 3.8 to 3.9 but then it falls down to 3.7 because he hanged around with friends. When a new school opened around his house, Los Osos School, his brother told him to move but in his mind, he did not want to because he already had friends there. However, since the new school was bigger and newer, he moved. After moving a while, he got new friends. His grade falls down slightly into 3.4. In this school, he was very well-known. Students copied the style of his cloth.

How he entered JYPE

In 2005, while he was studying in the US, his Korean friend asked him to go to Korean Music Festival in Los Angles. On that day, JYPE sent staffs to audition there. A JYPE staff and a staff from another company invited him to audition. They discussed who comes to him first so Nichkhun walked out but gave his number to both of them. The next day, the staff from another company called him but he told that guy he was not interested. On the same day, JYPE called him and told him that JYPE was the company that Rain was in. This interested him. After a lot of calls, Nichkhun gave out the reason that he was far away from the town and he did not have a car. So, the staff made an appointment with him at a coffee shop nearby his house.

In 2006, Nichkhun became a new trainee under JYP Entertainment which has Rain, the singer & actor, under it. He signed the contract for 8 years. His first work under JYPE is to be the MC in Thailand for Super Star Survival, a reality show. He went to Korea for a week to see how JYPE works and how they train. Then, he was back to Thailand for 2 weeks to shoot for this show at Siam Square. He started to be known. Reporters and K-pop magazines asked for interviewing. Finally, He went back to the US to continue his study but there was a problem. He asked his friend to send a days-off letter to the school before but the letter was not sent to the school. He failed on his last semester. So, he got on a test to get the Diploma from the school.Nichkhun was born in Rancho Cucamonga, California, USA. At the age of 18 months old, he moved by to Thailand with his family. His old house used to be on Soi. Charunsanitvong 37. He studied until Grade 4 at Thepkanchana School, Prannok district. During those times, he always got awards on healthy teeth. Then, he moved to live around puttamonthon sai 3 road. He graduated his Grade 6 at Tungpiruntham School and then continued pre-high school at Nawamintharachinutit Satriwittaya Phuttamonthon School. Then, he with his brother moved to study at Wanganui Collegiate School in New Zealand. When his brother moved to the US, he was so lonely and called home many times but finally he can adapt himself there.

At the age of 12 years old, after study New Zealand for a year and a half, his auntie tells his parents that there is an empty room in her house so he moved to study in the US in the small town in California. He entered to Grade 9. At his first year there, he got GPA 3.8 to 3.9 but then it falls down to 3.7 because he hanged around with friends. When a new school opened around his house, Los Osos School, his brother told him to move but in his mind, he did not want to because he already had friends there. However, since the new school was bigger and newer, he moved. After moving a while, he got new friends. His grade falls down slightly into 3.4. In this school, he was very well-known. Students copied the style of his cloth.