[15][16][19] In 2011, Jay B was cast in the role of Jang Woo-jae in the television drama Dream High 2,[9] which began airing on January 30, 2012, on KBS for 16 episodes.

[28][29] In 2016, with the extended play Flight Log: Departure, his self-written songs started being included in Got7's album under the pseudonym Defsoul[1] or Def.

[2][30] In 2018, together with group mate Yugyeom, he participated in the art collaboration project Collaboran for carbonated mineral water brand Perrier with American multimedia artist Ben Jones.

"[32] In December 2019, he launched the JB Collection, a summer-themed clothing line in collaboration with Represent, which went on sale for two weeks and sold 35,940 items.

[39] On May 11, 2021, he signed an exclusive contract with H1ghr Music,[40][41] debuting as a solo artist three days later by releasing the single "Switch It Up" featuring rapper Sokodomo,[8] which entered at number 12 on the Gaon Download Chart.

[8] On May 25, 2021, Jay B became the first Korean soloist to enter the Billboard R&B Digital Song Sales Chart, debuting at number six.

[48] In August, he appeared on MBC's singing competition show King of Mask Singer as "Toad's House" on episode 319.

[50] As part of the album promotions, Jay B held his first solo global fan meeting, "SOMO:Fume, Style of My Own:Fume," on September 25 through online platform Bbangya TV,[51] while the official merchandise launched to commemorate the release of the EP, which went on sale for one week from September 2,[52] was sold out in five days.

[53] An offline pop-up store selling additional items was subsequently opened in Seoul for two weeks from October 1, 2021.

[54] In September, he participated in "Feel the Rhythm of Korea 2", a promotional campaign sponsored by the Ministry of Culture, Sports and Tourism and the Korea Tourism Organization, for which he sang "I'm Surfin," a re-interpretation of traditional song "Niliria" (늴리리야; Nuilliri-ya), which was released on September 3 along a music video.

[56] On October 18, he collaborated with Italian singer-songwriter and producer Fudasca on the single "Is It A Dream?,"[57] while in November, he starred in the new Adidas Originals winter campaign, "Open Spirit," along with Blackpink.

[62] On June 18, 2022, he held the Nostalgic concert at Jangchung Arena to commemorate ten years since his debut:[63] the event was followed by more than 10,000 people both online and offline.

[65][66] His first release under the new label was the single "Rocking Chair",[67] which he first performed at the Nostalgic concert,[64] and that was chosen by Bandwagon as one of the best songs of the year.

Represent collection to support families in need caused by COVID-19 and abused children, reaching ₩100 million (US$87,416.41) and thus being appointed as an official member of the Green Noble Club in December.