Lolohea was again named in the Warriors' Auckland Nines squad. In Round 3 against the Parramatta Eels, Lolohea scored his first NRL try in the Warriors 29-16 win at Mt Smart Stadium. On 2 May, he played fullback for Tonga against Samoa in the Polynesian Cup, in Tonga's 18-16 loss at Cbus Super Stadium. In round 18, against the Melbourne Storm, Lolohea scored one of the best tries of the 2015 season when he finished a sensational team effort; Nathan Friend was upended and displayed his best acrobatic moves when he chased a Chad Townsendbomb kick and delivered a stunning back flip pass to Sam Tomkins, the ball passed between further Warriors before Lolohea scored in the corner. Lolohea finished the season with 23 matches, 11 tries and 13 goals, while mid-season his contract was extended until the end of 2018. Lolohea was selected in the final 23-man squad for the New Zealand Kiwis'tour of Great Britain. After injuries to Kieran Foran and Shaun Johnson, the Kiwis were forced to search for a new halves pairing. Lolohea had recently been playing in the halfback role for the Warriors so he was chosen by Kearney to play at halfback with Peta Hiku. Many people were questioning the inexperience of the halves pairing but it was revealed by Stephen Kearney that the two had been training together in secret during the NRL finals to become better adapted to the situation. He played halfback in the first test against England, in the 26-12 loss at KC Stadium, but was not selected for any further games in the series.
2016
In February, Lolohea played for the Warriors in the Auckland Nines. Starting the season playing on the wing, he finished the year mostly playing at fullback. He finished the season with 23 matches, scoring 5 tries and kicking 9 goals.
2017
On 6 May, Lolohea was selected for Tonga to play against Fiji in the 2017 Pacific Cup, he played at five-eighth in the 26-24 win. After playing in the first 4 rounds, Lolohea was dropped to the Warriors NSW Cup team. He subsequently attracted interest from the Wests Tigers, Canberra Raiders and the North Queensland Cowboys. On 27 May, Lolohea was granted a release from his contract with the Warriors. He played 52 first-grade matches for the club, scoring 17 tries and 18 goals for a total of 104 points. Warriors coach Stephen Kearney said that Lolohea was granted a release so he could play in the halves at another club. He signed with the Wests Tigers on 29 May. Lolohea said of his move from the Warriors, "I was overweight. I was unhappy. I was struggling. Playing reserve grade on the wing probably didn't help. I was off it a little bit. I've lost six kilograms since coming here and each week I'm feeling better on the field. In the first month at the Tigers, I was struggling and my weight had a lot to do with it." He made his club debut in round 13, and remained at five-eighth for the rest of the season, also taking over goal-kicking duties. He scored 4 tries and 92 points in his 13 matches with his new club. Returning to the Tongan rugby league team, Mate Ma'a Tonga, for the World Cup, Lolohea played in every game of the tournament at five-eighth. Tonga won five straight games before losing to England in the semi-final. Lolohea scored a try in each of the last 3 games. Considered to have played a major part in the team's success in the series, Lolohea was gifted land in Tonga as a reward. Coach Kristian Woolf said, "Jason and Tui were given land by the nobles in the villages of their families. I guess it was a reward for what they have done … it’s certainly taken the nation on an amazing ride."
2018
With departure of James Tedesco in the off-season, Lolohea was chosen as the new fullback for round 1, and kicked the game-winning conversion to defeat the Roosters 10-8. July 2018. It was announced that Lolohea would be departing West Tigers at the end of the season and joining the Leeds Rhinos in the Super League.
