Since the development of generative AI like ChatGPT, libraries in Japan and other countries have been exploring the use of AI in their reference services. Books Kinokuniya, which has a library outsourcing business department, is also researching how to incorporate AI into the library services they manage. They have conducted experiments using the Kanda Search semantic search engine for AI reference services. After analyzing the content in the NDL’s Collaborative Reference Database and Japanese Wikipedia, the search results from Kanda Search were found to differ from those of standard search engines. These results suggest that Kanda Search can play a supplementary role in supporting the reference work performed by human librarians. The concept of team-based reference work may become a reality in future libraries.