日本は南北に細長く，亜寒帯から亜熱帯までを含み，昆虫相は非常に面白く豊かです．種類数は全ヨーロッパにほぼ匹敵しするほどで，北アメリカの60～70％に達すると考えられています．現在，およそ32,000種が日本から記録されていますが，実際には10万種を超えることが推定できます。
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Japan is long and narrow from north to south, spanning from the subarctic to the subtropical zones, and its insect fauna is remarkably interesting and rich. The number of species is believed to rival that of all of Europe and may reach about 60-70% of that found in North America. Currently, approximately 32,000 species have been recorded in Japan, but it is estimated that the actual number may exceed 100,000 species.