SeikinTV

Seiya Kaihatsu (Japanese: ; born: ), better known online as SEIKIN (Japanese: ), is a Japanese YouTuber and singer-songwriter.
His brother, Hikaru Kaihatsu, is also a popular YouTuber in Japan, under the name of HIKAKIN. In fact, HIKAKIN inspired SEIKIN to be a YouTuber.https://www.youtube.com/watch?v=Z56H0q-PfKI They often collabolate, and they even make songs together.
==Personal life==
SEIKIN was born on July 30, 1987, in Myoko City, Niigata Prefecture, Japan.
When he was a junior high school student, he was in an a cappella group.https://www.youtube.com/watch?v=Z56H0q-PfKI He used to play trombone too.https://twitter.com/SeikinTV/status/584000523591745537
In the high school, he joined the ski club. He even got 4th place in Inter-High School Championships.https://twitter.com/hikakin/status/431434524728119297
After graduating high school, he entiered School of Literature in Senshu University, but he dropped out.Then he entered an electric power company, but he got harrassed by people in the company, so he quit.https://www.youtube.com/watch?v=M_iZxwf5Uoc
==Career==
He debuted as a YouTuber on March 2, 2012. Originally, he focused on making songs and singing.
He joined UUUM when his brother HIKAKIN founded it.
On December 25, 2014, he got married.https://www.youtube.com/watch?v=iMjXoAVipaM His wife hardly reveals her personal information, but she's known online as ポンちゃん (English: Pon-Chan) and she sometimes shows up on SEIKIN's videos without showing her face. She has an Instagram account. On April 12, 2018, they had a son.https://www.youtube.com/watch?v=czmMr0LuMS8 He also sometimes shows up under the name of チビキン (English: Chibikin)
==Channel milestones==
===Subscriber milestones===
====SeikinTV====
====SeikinGames====
===Video view milestones===
====SeikinTV====
*100 million views: August 24, 2014
*1 billion views: June 17, 2016
*2 billion views: November 1, 2017
*3 billion views: November 2019
==Discography==
===Singles===
*YouTubeテーマソング (2015, with HIKAKIN)
*Just Do It Now (2015)
*Keep Your Head Up (2016)
*雑草 (2017, with HIKAKIN)
*今 (2018, with HIKAKIN)
*夢 (2019, with HIKAKIN)
*光 (2021, with HIKAKIN)
*FIRE (2021, with HIKAKIN)
==Trivia==
*His favorite food is ramen.https://twitter.com/seikintv/status/264357426931830785
*He has Lamborghini Aventador S, Lexus LS Hybrid, Toyota Alphard Hybrid Executive Lounge S, and Ferrari F8Tributo.https://www.youtube.com/watch?v=WGqlrfqStBshttps://www.youtube.com/watch?v=wpcosywdtz0https://www.youtube.com/watch?v=OJqSib_w-0Ahttps://www.youtube.com/watch?v=pzUADpLXUeE
==References==
Category:Comedy YouTubers
Category:Gaming YouTubers
Category:Music YouTubers
Category:Prank YouTubers
Category:Review YouTubers
Category:Vlogging YouTubers
Category:Japanese YouTubers
Category:Users who joined in 2012
Category:One million subscribers
Category:Two million subscribers
Category:Three million subscribers
Category:Four million subscribers
Category:One billion views