The present invention provides the packed soy sauce-containing liquid seasoning, containing the following (A), (B), (C), and (D):(A) sodium 2.7 to 5.1% by mass (B) potassium 0.8 to 4% by mass (C) proline 0.28 to 1% by mass (D) isoleucine 0.2 to 1% by mass.