In recent years, many jurisdictions have integrated forensic interview methods into their criminal justice systems to gain accurate information on cases, especially from child victims. However, the admissibility of statements obtained through forensic interviews still needs to be fully explored. Then, this chapter focuses on their admissibility, particularly in the context of the rules of evidence concerning expert evidence. In the United States of America (U.S.), the Daubert decision has shaped the legal framework for assessing the reliability of expert evidence, providing a foundation for scholarly and legal debate. This chapter refines the Daubert standard to make it appropriate for determining the admissibility of forensic interview evidence. Based on this standard, it then examines the admissibility in the U.S. and Japan. Forensic interview evidence basically seems to be admissible in the U.S. In comparison, there are several challenges in Japan. This chapter proposes two recommendations aimed at enhancing the admitting of forensic interview statements in Japan.