LE SSERAFIM debuted on May 2, 2022, with their first mini album FEARLESS under Source Music.

🌟 Quick Scoop: When did LE SSERAFIM debut?

If you’ve been hearing “when did le sserafim debut” all over forums and K‑pop Twitter, you’re not alone—people keep discovering them through newer tracks and then working backwards to their origins.

  • Official Korean debut: May 2, 2022 with the EP FEARLESS.
  • Company: Source Music under HYBE.
  • Original lineup: six members; they later continued as five (Sakura, Kim Chaewon, Huh Yunjin, Kazuha, Hong Eunchae).
  • Japanese debut: January 25, 2023 with the single “FEARLESS.”

In short: if you’re asking “when did LE SSERAFIM debut,” the key date to remember is 2022‑05‑02 for Korea, and 2023‑01‑25 for Japan.

Mini Timeline 🗓️

  1. April 13, 2022 – Debut EP FEARLESS is announced by Source Music.
  1. May 2, 2022 – LE SSERAFIM officially debut with FEARLESS and the title track of the same name.
  1. May 10, 2022 – They get their first music show win just eight days after debut, on SBS MTV’s The Show.
  1. October 17, 2022 – Release of second EP ANTIFRAGILE , which goes on to pass 1 million sales and puts them on the Billboard 200.
  1. January 25, 2023 – Japanese debut with single “FEARLESS,” later certified Double Platinum in Japan.

Why this debut date still trends

Even in 2025–2026, “when did LE SSERAFIM debut” keeps popping up in searches and forum discussions because many newer listeners first encounter them through later hits like ANTIFRAGILE , UNFORGIVEN , or EASY and only then realize they’re a relatively recent group, debuting in 2022 , not during earlier K‑pop generations. Fans also like to mark each May 2 as the group’s anniversary and use it as a checkpoint to compare how far they’ve come in charts, tours, and international popularity.

Forum / Discussion Angle

If you saw this question in a forum thread, the “correct” short reply would usually look like:

They debuted on May 2, 2022 with the mini album FEARLESS under Source Music (HYBE label). Their Japanese debut came later on January 25, 2023 with the single “FEARLESS.”

People often follow up with recommendations like:

  • Start with: “FEARLESS,” “ANTIFRAGILE,” “UNFORGIVEN,” “EASY.”
  • Then check out their performances and tour clips from the Flame Rises tour and later world tour dates.

TL;DR: LE SSERAFIM’s debut date is May 2, 2022 in Korea (EP FEARLESS), and January 25, 2023 in Japan (single “FEARLESS”).

Information gathered from public forums or data available on the internet and portrayed here.