In this study, we explored science understanding and attitudes in Japan compared to the United Kingdom (UK) and the United States (US), examining trust in science versus humanities. Our web-based survey revealed that Japan's research literacy matches its Western counterparts. However, there were notable differences in scientific knowledge depth and public trust in research. Interestingly, higher scientific knowledge correlated with increased trust in research outcomes, a trend not seen in the humanities. In Japan, political ideologies did not significantly influence trust in science or humanities and showed little correlation with scientific knowledge or research literacy. This contrasts with the UK and the US, where political ideology impacts public trust in these fields.