Largehead hairtail (Trichiurus lepturus) is a commercially important warm-water species widely distributed in Korean coastal and offshore waters as well as adjacent waters. Recently, recreational fishing catches of this species have increased substantially, raising concerns about their contribution to total fishing pressure and the potential bias in stock assessment based solely on commercial catches. In this study, recreational fishing catches of largehead hairtail from 1970 to 2023 were reconstructed and combined with commercial catches to estimate total removals. Stock assessments were conducted using the CMSY (Catch-MSY) method under two scenarios: one using only commercial catches and the other incorporating recreational catches into the total catches. The results indicate that the current stock status of largehead hairtail is not overfished (B/BMSY > 1) and not subject to overfishing (F/FMSY < 1). However, the probability of overfishing increased compared to the scenario using only commercial catches when including recreational catches. This suggests that stock status may be overestimated if recreational removals are ignored. These findings highlight the importance of incorporating recreational fishing into stock assessments and indicate that systematic management of recreational fisheries should be implemented alongside commercial fisheries to ensure the sustainable use of the stock.