[4] Takeuchi started playing soccer when he was five, he belonged to Tokyo Verdy when he was young.

[2] In 2019, there were media speculations about Takeuchi and Ayaka Miyoshi's romantic relationship, but their agencies at that time did not disclose any information about the two, and they themselves did not comment on the reports till later in May 2020, when it was revealed by media outlets that they were already living together and were "counting down the days until marriage."

Unfortunately, on October 27, 2024, the couple reportedly split after four years to focus more on their careers.

In January 2020, he played his first leading role in a Sunday Theatre (TBS) in Ship of Theseus.

[11] On April 25, 2022, Takeuchi was cast in TV Asahi's drama Roppongi Class, a remake of the hit South Korean drama series Itaewon Class as Arata Miyabe.