This paper examines the usefulness of metaphors by comparing the assessments of the current economic conditions of the US and Japan made by the countries’ respective monetary policy authorities. In particular, this paper compares the role played by metaphors in creating a technical lexicon for business cycle phases in each language, and presents three main empirical findings. First, in both the US and Japan, metaphors are used in keeping with the business cycle phases with which each economy is faced. Second, many of the verbal, adjectival and adverbial terms can be attributed solely to the mechanical metaphor in the US, while there is no incidence of this use in the case of Japan. Third, there are more metaphoric adjectives or adverbs in the assessments of the US economy than in those of the Japanese economy. These empirical findings can be useful for second language instruction in economics.