This paper assays how and what implicit meanings were constructed, structured and negotiated through an ambulance request call to the 119 call center in Yamagata, Japan in 2011. The assay reports that the call-taker’s method of occasioned semantics was operative and systematically patterned. Based on the results of the assay, with linguistic evidence, the paper critically argues that the rejection of an ambulance request was due in large part to the call-taker’s method of categorization when asking questions.