The new inspection system in Japan according to ROP (Reactor Oversight Process) to be introduced in April 2020 has new safety regulations based on performance indicators and risk information. This leads Japanese utilities to improve their probabilistic risk assessment (PRA) on each site using the latest findings and evaluation models. In order to improve their Human Reliability Analysis (HRA), a part of PRA, they have decided to use some quantitative methods (e.g. Technique for Human Error Rate Prediction (THERP)) installed in HRA Calculator® developed by Electric Power Research Institute (EPRI) to estimate Human Error Probability (HEP). Recent research suggests that a qualitative analysis collecting plant-specific and scenario-specific conditions that affect human performance as “Narratives” is important for realistic HRA because human performance is usually affected by various performance shaping factors such as psychological stress (overload, boredom, etc.) and physiological stress (fatigue, discomfort, etc.) This qualitative analysis is also important for reliable quantification.