5channel Data Services

Model training and adaptation

  • Japanese pretraining and continued pretraining
  • Domain and register adaptation toward informal Japanese
  • Conversational and multi-turn dialogue modelling
  • Tokenizer development and evaluation on non-standard orthography
  • Instruction and preference data construction from threaded exchange

Evaluation and benchmarking

  • Comprehension of informal Japanese, slang, and rapidly changing vocabulary
  • Threaded conversation understanding and reply attribution
  • Topic classification and content moderation model evaluation
  • Temporal generalisation: performance on language from a given period
  • Contamination-controlled held-out sets from specified date windows

Search, retrieval, and product use

  • Japanese retrieval corpora for RAG and answer generation
  • Query understanding and intent classification in colloquial Japanese
  • Recommendation and topical trend detection
  • Named entity and product mention extraction from consumer discussion

Research

  • Sociolinguistics and diachronic language change
  • Information diffusion and public discourse analysis
  • Computational social science on long-horizon community data

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