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Analyzing Social Biases in Japanese Large Language Models
Hitomi Yanaka, Namgi Han, Ryoma Kumon, Jie Lu, Masashi Takeshita, Ryo Sekizawa, Taisei Kato, Hiromi Arai
With the development of Large Language Models (LLMs), social biases in the LLMs have become a crucial issue. While various benchmarks for social biases have been provided across languages, the extent to which Japanese LLMs exhibit social biases has not been fully investigated. In this study, we construct the Japanese Bias Benchmark dataset for Question Answering (JBBQ) based on the English bias benchmark BBQ, and analyze social biases in Japanese LLMs. The results show that while current open Japanese LLMs improve their accuracies on JBBQ by setting larger parameters, their bias scores become larger. In addition, prompts with warnings about social biases and Chain-of-Thought prompting reduce the effect of biases in model outputs, but there is room for improvement in the consistency of reasoning.
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