Competition law sanctions in Japan are described after first dividing the issues into cartels and non-cartels. Regarding non-cartels, although the 2009 Amendment introduced administrative fine systems, there are only a few orders, arguably because the Japan Fair Trade Commission (JFTC) tends to avoid orders that addressees would be likely to contest in the courts. As a result, the JFTC stresses the importance of advocacy instead of frequently enforcing the law. In contrast, regarding cartels, the JFTC has repeatedly issued administrative fine orders. The 1977 Amendment introduced the fine system against cartels, and the 2005 Amendment introduced a leniency system. If the violator is either a repeat offender (recidivism) or a cartel ringleader, the fine becomes 1.5 times higher (if both, 2.0 times higher). There are no fining guidelines. Thus far, the sanctions related to cartels seem to work effectively; quite a few cartels seem to have been deterred. The chapter also describes the framework of the 2019 amendment that took effect in December 2020.