This is a set of answer and explanation booklets from the Tokyo Hokei Gakuin's 2020 and 2021 nationwide mock exams. There are some writings, folds, and tears (in some parts), but I acquired them in a similar condition and used them repeatedly for my exam studies. I believe they are usable enough for studying to pass the exam. *However, please refrain from purchasing if you are overly concerned about the condition.* Since they are from 2020 onwards, they of course correspond to the major revisions of the Civil Code. *The 2021 booklets are in better condition regarding writings, etc., compared to the 2020 ones.* If you want to cover as many points as possible, or if you plan to use them throughout the year, please consider purchasing them.