This is a list of Japanese football J1 League transfers in the summer transfer window 2018 by club.
In:Note: Flags indicate national team as defined under FIFA eligibility rules. Players may hold more than one non-FIFA nationality.
| Out:Note: Flags indicate national team as defined under FIFA eligibility rules. Players may hold more than one non-FIFA nationality.
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In:Note: Flags indicate national team as defined under FIFA eligibility rules. Players may hold more than one non-FIFA nationality.
| Out:Note: Flags indicate national team as defined under FIFA eligibility rules. Players may hold more than one non-FIFA nationality.
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In:Note: Flags indicate national team as defined under FIFA eligibility rules. Players may hold more than one non-FIFA nationality.
| Out:Note: Flags indicate national team as defined under FIFA eligibility rules. Players may hold more than one non-FIFA nationality.
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In:Note: Flags indicate national team as defined under FIFA eligibility rules. Players may hold more than one non-FIFA nationality.
| Out:Note: Flags indicate national team as defined under FIFA eligibility rules. Players may hold more than one non-FIFA nationality.
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In:Note: Flags indicate national team as defined under FIFA eligibility rules. Players may hold more than one non-FIFA nationality.
| Out:Note: Flags indicate national team as defined under FIFA eligibility rules. Players may hold more than one non-FIFA nationality.
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In:Note: Flags indicate national team as defined under FIFA eligibility rules. Players may hold more than one non-FIFA nationality.
| Out:Note: Flags indicate national team as defined under FIFA eligibility rules. Players may hold more than one non-FIFA nationality.
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In:Note: Flags indicate national team as defined under FIFA eligibility rules. Players may hold more than one non-FIFA nationality.
| Out:Note: Flags indicate national team as defined under FIFA eligibility rules. Players may hold more than one non-FIFA nationality.
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In:Note: Flags indicate national team as defined under FIFA eligibility rules. Players may hold more than one non-FIFA nationality.
| Out:Note: Flags indicate national team as defined under FIFA eligibility rules. Players may hold more than one non-FIFA nationality.
|
In:Note: Flags indicate national team as defined under FIFA eligibility rules. Players may hold more than one non-FIFA nationality.
| Out:Note: Flags indicate national team as defined under FIFA eligibility rules. Players may hold more than one non-FIFA nationality.
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In:Note: Flags indicate national team as defined under FIFA eligibility rules. Players may hold more than one non-FIFA nationality.
| Out:Note: Flags indicate national team as defined under FIFA eligibility rules. Players may hold more than one non-FIFA nationality.
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In:Note: Flags indicate national team as defined under FIFA eligibility rules. Players may hold more than one non-FIFA nationality.
| Out:Note: Flags indicate national team as defined under FIFA eligibility rules. Players may hold more than one non-FIFA nationality.
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In:Note: Flags indicate national team as defined under FIFA eligibility rules. Players may hold more than one non-FIFA nationality.
| Out:Note: Flags indicate national team as defined under FIFA eligibility rules. Players may hold more than one non-FIFA nationality.
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In:Note: Flags indicate national team as defined under FIFA eligibility rules. Players may hold more than one non-FIFA nationality.
| Out:Note: Flags indicate national team as defined under FIFA eligibility rules. Players may hold more than one non-FIFA nationality.
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In:Note: Flags indicate national team as defined under FIFA eligibility rules. Players may hold more than one non-FIFA nationality.
| Out:Note: Flags indicate national team as defined under FIFA eligibility rules. Players may hold more than one non-FIFA nationality.
|
In:Note: Flags indicate national team as defined under FIFA eligibility rules. Players may hold more than one non-FIFA nationality.
| Out:Note: Flags indicate national team as defined under FIFA eligibility rules. Players may hold more than one non-FIFA nationality.
|
In:Note: Flags indicate national team as defined under FIFA eligibility rules. Players may hold more than one non-FIFA nationality.
| Out:Note: Flags indicate national team as defined under FIFA eligibility rules. Players may hold more than one non-FIFA nationality.
|
In:Note: Flags indicate national team as defined under FIFA eligibility rules. Players may hold more than one non-FIFA nationality.
| Out:Note: Flags indicate national team as defined under FIFA eligibility rules. Players may hold more than one non-FIFA nationality.
|
In:Note: Flags indicate national team as defined under FIFA eligibility rules. Players may hold more than one non-FIFA nationality.
| Out:Note: Flags indicate national team as defined under FIFA eligibility rules. Players may hold more than one non-FIFA nationality.
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The 2019 J1 League, also known as the 2019 Meiji Yasuda J1 League for sponsorship reasons, was the 27th season of the J1 League – the top Japanese professional league for association football clubs since its establishment in 1992. This was fifth season of J1 League as renamed from J. League Division 1.
The 2020 season was Kashima Antlers's 28th consecutive season in the J1 League, the top flight of Japanese football, since the introduction of professional football in 1993. The club finished the 2019 J1 League in third place, securing a play-off spot in the 2020 AFC Champions League. In addition to these competitions, they also competed in the Emperor's Cup and J.League Cup.
The 2021 season was Kashima Antlers' 29th consecutive season in the J1 League, the top flight of Japanese football since the introduction of professional football in 1993. The club finished the 2021 J1 League in fourth place, one place above their position from the previous season. They also competed in the Emperor's Cup and J.League Cup and reached the quarter-finals of both competitions.
The 2022 season was Kashima Antlers' 30th consecutive season in the J1 League, the top flight of Japanese football since the introduction of professional football in 1993. The club finished the 2022 J1 League in fourth place, exactly the same position as the previous season. They also competed in the Emperor's Cup where they reached the semi-finals and the J.League Cup where they were knocked out at the play-off stage.
The 2023 season was FC Machida Zelvia's 34th season in existence and the club's eighth consecutive season in the second division of Japanese football. In addition to the domestic league, FC Machida Zelvia also participated in this season's edition of the Emperor's Cup.
The 2024 Vissel Kobe season is their 58th season in existence and the 9th consecutive season in the J1 League, since the club earned promotion back to it on 2013. In addition to the domestic league, in which they are the defending champions, Vissel Kobe are participating in this season's editions of the Japanese Super Cup, Emperor's Cup, the J.League Cup and the AFC Champions League.
The 2024 season is Kashima Antlers' 32nd consecutive season in the J1 League, the top flight of Japanese football since the introduction of professional football in 1993. As well as the domestic league, they will compete in the Emperor's Cup and the J.League Cup.