In 2012, he enrolled in EXPG STUDIO at the age of 15. Before the debut, he participated in many live tours as a back-up dancer which helped him gain some experience.
The performer group "FANTASTICS" was formed on December 29, 2016.
From February to April of 2017, the group held "Musha Shugyo" where they toured around Japan by bus. 50 shows held at 18 venues in 14 cities drew more than 30,000 viewers, setting a new record.
Two vocalists who won the audition with about 30,000 participants held from May to December of 2017 joined the group and the new "FANTASTICS" was born.
From April to June of 2018, "Musha Shugyo　FANTASTIC 9" was held as a preparation for the group's official debut. Even though it was before their debut, they presented 78 shows at 33 venues across Japan and drew about 75,000 viewers.
On December 5, 2018, the group debuted with the song "OVER DRIVE".

With his bright personality, he actively appears on variety shows.
He is currently appearing in the regular corner "FANTASTICS no Niigata 100 Mile" which started from April 2023 on NST "YACHIYO COASTER".

He released his first photo book "ViVigura Seguchi Leiya" on March 11, 2024, his 28th birthday.