Mapping Japan’s China-related twitter discourse (2010–2024) using BERTopic
Fig 7
Overall sentiment evolution in China-related discourse on Japanese twitter (2010−2024).
It presents a sentiment heatmap organized by year and topic. Color intensity reflects the sentiment score, calculated annually by summing the sentiment values of all tweets within each topic (very negative = −2 negative = −1, neutral = 0, positive = +1, very positive = +2). Darker colors indicate stronger sentiment polarity, whether positive or negative. The horizontal axis represents the year, while the vertical axis lists the ten topics.