Prior to the end of 2017, Gamba announced the capture of young defenders; Tetsuya Yamaguchi and Riku Matsuda as well as midfielder Yuya Fukuda all straight out of high school. Meanwhile, midfielder Ren Shibamoto and attacker Haruto Shirai were promoted to the first team squad after impressing for Gamba's Under-23 side in J3 during 2017. Shortly before Christmas the signings of attacking midfielder Shinya Yajima and former Gamba youth product, centre-back Shunya Suganuma were announced, with the duo arriving from Urawa Reds and Montedio Yamagata respectively. This news was followed a few days later with the news of the signing of Japan Under-17 midfielder Keito Nakamura from Tokyo-based Mitsubishi Yowa SC as well as the promotion of Under-23 goalkeeper Kosei Tani to the first team squad. 2 league games into the campaign and Gamba secured the signing of former Brazil Under-20 defensive midfielder Matheus Jesus on loan from Portuguese side Estoril. His contracted would run until the end of the year. Long serving goalkeeper Yosuke Fujigaya, who had made over 250 league appearances for the club announced his retirement at the end of the 2017 season after spending the previous 3 years providing backup to established number 1, Masaaki Higashiguchi. Holding midfielder Tatsuya Uchida turned his loan move to Tokyo Verdy into a permanent one and he would be joined at the Tokyo club by young forward Hiromu Kori who had spent the previous season on loan with Gamba Under-23, scoring 3 goals in 17 appearances. Additionally experienced Japanese-born but Korean passport holding centre-back Kim Jung-ya moved to Vegalta Sendai, while Kashima Antlers forward Shuhei Akasaki returned to his parent club following a disappointing loan spell which yielded only 2 goals. 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.
In Out ==Coaching staff==