Dear Ross,
Thanks very much for your questions, and apologies for the lack of clarity in the ad—the language of these things often has to go through an enormous number of committees and subcommittees which can result in this.
The main thing we're trying to get across by terms like "textuality," "religiosities," and "intermediality" is that we're casting a wide net here, and welcome applicants even if their work does not neatly fit into established categories. In the cases of "textuality,"
that certainly might mean scholars of literature, and also book history, history of writing/language, mokkan, etc.; for "religiosities," that might mean scholars of Buddhism or Shinto, and also any religious or spiritual practices beyond those; for "intermediality,"
that might be historians of art, and also scholars whose work might move across visual art, literature, theater, architecture, music, material culture, and so on.
Best,
Andrew