 Tu'ungafasi became a regular starter for the Blues in the 2018 Super Rugby season, replacing the departed Charlie Faumuina as the first-choice tighthead prop.During Super Rugby, Tu'ungafasi re-signed to the New Zealand Rugby Union, with a deal lasting until 2021.After the Blues had a disappointing Super Rugby season, Tu'ungafasi was retained by the All Blacks for the three-test series against France in 2018.