KMT-2021-BLG-0119L is a Sun-like G-type star (about 0.56 solar masses, 5,778 K), 3,130 light-years from Earth. KMT-2021-BLG-0119L b is a 5.52-Jupiter-mass companion, at 2.920 AU from its star, discovered in 2022 via microlensing. Microlensing detections occur when a foreground star's gravity briefly magnifies a background source, revealing planets that are otherwise too faint and distant to observe directly. KMT-2021-BLG-0119L b circles in the outer system, comparable to the Jupiter region. At 5.5 Jupiter masses, the companion lies near the dividing line between giant planets and brown dwarfs.