NII develops new domestic LL trained on a high-quality corpus of 12 trillion tokens | News | Science Japan 2026.05.21 Achievements English: NII develops new domestic LL trained on a high-quality corpus of 12 trillion tokens | News | Science Japan Chinese: 科学研究 – NII开源发布新一代国产LLM:基于约12万亿词元优质语料训练 – 客观日本