promotion and relegation system J1 Entry playoffs have been introduced from 2018, 2019 and 2022 respectively. Relegation from J1 to J2 introduced from 1999, J2 to J3 introduced from 2013 and J3 to JFL introduced from 2023. J1 Promotion playoff introduce from 2012 to 2017, reintroduced in 2023 onwards and J2 Promotion playoff to be introduce start from 2024. In 1998, the J1 entry decision match was held. From 1999, a replacement system was introduced with the transition to a two-part system of J1 and J2. Since 2012, a replacement system has been introduced between J2 and the lower league (Japan Football League (JFL) in 2012, J3 after the 2013 postseason). Until the introduction of the J.League club license system in 2012, if a J2 club that obtained the right to be promoted to J1 through the examination by the J.League did not meet J1 standards, the promotion to J1 would be revoked, and the relegation to J2 from the 16th place in J1 would also be revoked. could have been used, but there have been no cases in which it has actually been applied. If a club that has received a loan from the official match stable holding fund cannot repay it by the repayment date, the club belonging to J1 will be demoted to J2 even if it is in the order to remain in J1, and the club belonging to J2 will be promoted to J1. However, the promotion will be postponed. It is unknown whether promotion will be postponed even if it is a rank that can be promoted to J2 in the clubs belonging to J3. However, at the end of the 2021 season, the only cases in which this system could have been applied in the past were Oita in 2013. After the 2012 postseason (entry in 2013), in order to enter the J1, J2 and J3 leagues, it is necessary to obtain a license for that league or higher under the club license system. If the number of matches that have been completed does not reach 75% of the total number of matches scheduled for the year in the J1/J2/J3 league, or if the number of matches in the category to which one belongs falls short of 50% of the total number of matches scheduled for that year. If there is a club that does not exist, the tournament will be disqualified and