Very useful for all kind of geographical information (including some historical and ethnological data) is the multivolume set of the
Also, works like
The ongoing ICS Ancient Chinese Text Concordance Series (Xian Qin liang Han gu ji zhu zi suo yin cong kan) are catalogued under separate subject by title; e.g.
A similar set for the Nanbeichao period is in development. Also see such works as
See also the various databases listed in the General East Asian Library Guide. For the most up-to-date Japanese articles on Chinese history, broadly defined, see the May issue each year of the periodical: