This is the Oin Honban Level Test hosted by Yotsuya Otsuka in April. I don't think it's very widely available. It includes the four subjects' questions, answers, and explanations. Since my child actually worked on it, there are pencil markings here and there. Red pen corrections are included in the answers. The results of this test determine whether you can enter the Oin course (if the system is still the same). This is from the 2023 academic year's exam. The scores were terrible, but because they were still in the top ranks, my child was able to qualify for the course. It's quite difficult. I will also include the materials I received at the parents' information session for Waseda Academy's NN Oin. Please use them for reference. For 2025 junior high school entrance exam candidates, to reconfirm in the final stages! For 2026 junior high school entrance exam candidates, towards the April Oin mock exam! I'm cheering you on!