On September 22, 2006, in the final battle of "EXILE VOCAL BATTLE AUDITION 2006 ~ASIAN DREAM~", TAKAHIRO won the position of EXILE's new vocalist out of about 10,000 contestants and joined EXILE.
In 2012, TAKAHIRO formed the rock band "ACE OF SPADES" with HISASHI (GLAY) and other 2 members.
In 2014, TAKAHIRO held his first personal exhibition "Hajime -EX Baka Diary-".
In September 2015, TAKAHIRO released his memorable solo album "the VISIONALUX" that summed up his career up till then.

On October 4, 2017, he released his single "Eternal Love". It was chosen as the commercial song for "Huis Ten Bosch 'Kingdom of Lights'".
On December 6, 2017, he released his mini album "All-The-Time Memories" which included 3 songs written and composed by him. He has been very active as a solo artist.

In 2017, TAKAHIRO launched his first fan club event "EXILE TRIBE FAMILY FAN CLUB EVENT 'TAKAHIRO Michi no Eki 2017-2018'".
In February 2019, ACE OF SPADES released their long-awaited first album "4REAL". What's more, they also held their first nationwide tour "ACE OF SPADES 1st. TOUR 2019 '4REAL'" which included 7 shows in 5 cities.

In July of the same year, TAKAHIRO launched "EXILE TRIBE FAMILY FAN CLUB EVENT 'TAKAHIRO Michi no Eki 2019'" which was the "sequel" of his previous fan club event held from 2017 to 2018. Together with "TAKAHIRO Michi no Eki 2017-2018" which was held in 28 cities around Japan, he succeeded to hold fan club events in all the 47 prefectures.
In September of the same year, TAKAHIRO's series ＜EXILE RESPECT＞ in which he would continue to cover and release EXILE's songs started, and the 1st single "Unmei no Hito" and 2nd single "Heavenly White" were digitally released on September 28 and December 21.

In February 2022, EXILE's arena tour "RED PHOENIX" was held 13 years since the last one. In July of the same year, the dome tour "POWER OF WISH" with ATSUSHI's limited comeback was kicked off. In December of the same year, EXILE's dome live shows "'POWER OF WISH' ~Christmas Special~" were held. All these performances attracted 1 million viewers in total (top 1 among artists in Japan in 2022).

From April to June 2023, he held his first solo live tour "EXILE TAKAHIRO LIVE TOUR 'TAKAHIRO Michi no Eki 2023' ~Road to EXPLORE~" which had 20 shows around Japan. On September 21, 2023, he held his Nippon Budokan live show "EXILE TAKAHIRO BUDOKAN LIVE 2023 'EXPLORE'". On December 26, he held "EXILE TAKAHIRO CHRISTMAS LIVE 2023 ~EXPLORE~ Bounenkai" in Tokyo International Forum Hall A.

On April 10, 2024 he released his digital album "WILD & FREE" and from April 17, 2024 he successfully held his first Zepp live tour "EXILE TAKAHIRO LIVE TOUR 2024 'FULL THROTTLE'".
Following the year of 2023, "EXILE TAKAHIRO BUDOKAN LIVE 2024 'GLORY'" was held on an upgraded scale on September 21, 2024 and September 22, 2024.

As to his solo activities, TAKAHIRO participated in the project "Choo Choo Nishi kyushu TRAIN" and designed Kiha47 train (2-car set) which ran on JR Kyushu's existing railway. Furthermore, his work was exhibited at 【"Entertainment Art Exhibition 2022 (Art Exhibition of Versatile Men of Culture and Entertainers)"】 of the charity project to support cultural property protection and relief efforts, which the prime minister also participated in. His activities have stretched to various fields and shown his various talents.

As an actor, he appeared in "The Easygoing Police", "Wild Heroes" and the "HiGH&LOW" series. In 2017, he made his stage play debut by playing the lead role in "MOJO" which won the Laurence Olivier Award for Best New Comedy, the highest award in the U.K.'s theatrical field.

In May 2019, TAKAHIRO played his first solo lead role in the feature film "Meeting Myself". In September of the same year, he was featured in his first period drama titled "Three Nobunagas". In October 2025, he played Oda Nobunaga in TV Asahi network drama "Masked NINJA Akakage". His activity field has been widely extended.