The first entry is always the pin's source. Overall confidence is a weighted average of how firmly each reference supports the start and end times used above; a reference counts half as much for every 180 days older than the newest.
Estimated: the Gangnam-gu business-permit record (general restaurant, French food, 'Chaconne', Yeoksam Hills, from Ministry of the Interior open data via duli.co.kr[2]) shows the permit approved 2024-08-22; the first service date is not published, and a March 2025 Threads review already describes it as operating. The permit date is the only dated anchor found.
Permit date 2024-08-22, status operating[1]
Chef Shim Jung-taek, French omakase, address[1]
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French omakase by chef Shim Jung-taek (formerly head chef of Mosu Hong Kong), using seasonal Korean ingredients and fruit for acidity; a new MICHELIN Guide selection in 2026.[2]
Chaconne