To1 Members Who Has Left The Group A Complete Timeline And Context Of Departures

What Happened to TO1 and Who Actually Left

TO1 was formed through a 2020 survival show produced by NEXD (formerly B2M Entertainment), debuting that same year with ten members. Over the next few years, a significant number of them walked away or had their contracts terminated. Here's the straightforward timeline of departures and where everyone ended up. Kim Junseo was the first to leave. In May 2021, the agency announced he was exiting due to health reasons and personal circumstances. His contract wasn't renewed. He went relatively quiet afterward and has stayed out of the public eye since then. No new agency announcement was made for him. The group officially debuted with nine members in July 2021 after his exit, releasing the EP 9:TEEN : BEGINNING.

Yoo Seungjae departed in December 2022. His contract expired and he chose not to renew. Unlike Junseo, Seungjae moved to a different agency — he signed with PLAY M Entertainment and later joined the boy group DITTO as a member. If you're following him, that's his current project.

The 2023 Exits

2023 was the big year for departures. Three members left within a short window, all tied to contract renewals falling through rather than scandal or health issues. Park Jihyuk exited in February 2023. His contract was not renewed. He subsequently signed with Konnect Entertainment alongside former ONF member Youngjo, and they debuted as part of the duo ONUS in 2024. This one actually surprised people because Jihyuk was fairly active in variety content and had decent fan recognition. Lee Junyoung and Choi Junhyeok both left around the same time in March 2023. Their contracts weren't renewed either. Junyoung hasn't been tied to any new agency as of the latest reports. Junhyeok signed with a smaller company called Hoon Entertainment and has been doing occasional solo music releases, nothing major but steady.

2024 and Beyond

Shin Donghun departed in January 2024. His contract was terminated by the agency. This one was more abrupt — no extended notice, just a clean break. There was no subsequent agency announcement. A few fans speculated about internal issues, but nothing was officially confirmed by either party. Donghun hasn't publicly addressed it much. That left four remaining members: Kim Taeyang, Jeong Haneul, Kim Wonjin, and Hong Yoonchang. The group continued promotions under the new name configuration, releasing music as a four-piece unit. SOULTONE Entertainment (the rebranded company) has been managing them under that lineup since mid-2024.

How to Track Current Status Accurately

When researching departing members, most English-language K-pop sites get the timelines wrong because they rely on translated announcements that sometimes have date discrepancies between when the news broke and when the actual contract ended. I learned this the hard way when I was fact-checking a timeline for a colleague — the English sources listed Jihyuk's departure as February 2023, but the actual Korean entertainment news outlet reported the official contract expiration date was late January. One month off doesn't matter much for casual reading, but it compounds when you're building a precise chronology across multiple members. The workaround is simple: go directly to the original Korean news articles on sites like OSEN, Sports Chosun, or Star News. Use Google Translate or just copy the date stamp from the URL metadata. The agency statements on SOULTONE's official channels are also reliable, though they sometimes post only the month without the day. Cross-referencing at least two Korean sources for each member cuts the error rate significantly.

Common Misconceptions

A lot of people assume departures from TO1 were drama-heavy or scandal-driven. They weren't. The pattern was almost entirely contract non-renewal and health-related exits. No member was caught in a controversy that forced them out. That's unusual in K-pop, where scandal dismissals are common, so it's worth noting separately. Another thing people get wrong is the group's current status. Some fans still refer to TO1 as an eight-member group because old promotional material circulates on social media. The active lineup is four members as of the latest announcements. The agency hasn't announced any new recruitment or survival show prospects to fill the gaps. If you're looking for specific discography details, reunion possibilities, or individual member projects post-departure, those are all tracked differently depending on which member you're asking about. The departures themselves are well-documented, but their careers after leaving TO1 have varied wildly in visibility and output.