Another forward with a poor goalscoring record, Hiroto Goya moved to J2 League outfit Tokushima Vortis in an effort to rediscover his scoring touch, he would be joined in J2 by backup goalkeeper Ken Tajiri who extended his loan spell at Zweigen Kanazawa for a further season. Gamba U-23 centre back and sometimes central midfielder made the move to J3 side Grulla Morioka after making close to 50 appearances in J3 but failing to crack Gamba's senior side. At the beginning of January, a press conference was held confirming that key central midfielder Yosuke Ideguchi would join English EFL Championship side Leeds United. The Japanese international would however join Spanish Segunda División outfit Cultural Leonesa on loan for the remainder of the 2017–18 European club season. In the day's following Ideguchi's departure it was confirmed that young utility player So Hirao had been allowed to join Avispa Fukuoka on loan for 2018 and centre-back / defensive midfielder Shogo Nakahara had completed his loan spell with the club and would return to his parent club, Consadole Sapporo. Veteran midfielder Takahiro Futagawa also announced that he would spend another year on loan with Tokyo Verdy in J2 having spend the previous 18 months in Japan's capital. The first of February saw the announcement that young South Korean centre-back Bae Soo-yong would join J3 outfit Giravanz Kitakyushu on a season long loan. He spent the 2017 campaign with Gamba's Under-23 side, scoring once in 24 games and earning to red cards in the process. During the mid-season transfer window, it was announced at the end of June that midfielders Shinya Yajima and Jin Izumisawa would spend the second half of the year on loan at Vegalta Sendai and Tokyo Verdy respectively. Both players had struggled for game time with the top team and had spent large chunks of the season playing with Gamba U-23 in J3. Their departures cleared the way for the arrival of Renofa Yamaguchi midfielder Kosuke Onose at the end of July. Following the departure of Brazilian coach Levir Culpi in July, Matheus Jesus, who Culpi brought to the club on loan at the start of the season, found game time hard to come by and his loan from Portuguese side Estoril was cancelled by mutual consent. New head coach Tsuneyasu Miyamoto moved further to re-shape the squad by bringing in Vissel Kobe striker Kazuma Watanabe on a permanent deal while the tall Shun Nagasawa moved in the opposite direction on loan until the end of the year.