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is a Japanese
entomologist Entomology () is the scientific study of insects, a branch of zoology. In the past the term "insect" was less specific, and historically the definition of entomology would also include the study of animals in other arthropod groups, such as arach ...
who has specialised in the
scale insect Scale insects are small insects of the order Hemiptera, suborder Sternorrhyncha. Of dramatically variable appearance and extreme sexual dimorphism, they comprise the infraorder Coccomorpha which is considered a more convenient grouping than th ...
s (
Coccoidea Scale insects are small insects of the order Hemiptera, suborder Sternorrhyncha. Of dramatically variable appearance and extreme sexual dimorphism, they comprise the infraorder Coccomorpha which is considered a more convenient grouping than the ...
), particularly the armoured scale insects of the
Diaspididae Diaspididae is the largest family of scale insects with over 2650 described species in around 400 genera. As with all scale insects, the female produces a waxy protective scale beneath which it feeds on its host plant. Diaspidid scales are far mo ...
. Takagi studied at
Hokkaido University , or , is a Japanese national university in Sapporo, Hokkaido. It was the fifth Imperial University in Japan, which were established to be the nation's finest institutions of higher education or research. Hokkaido University is considered ...
, where he received his bachelor's degree, his master's and his doctorate in agriculture. He specialized in studying the armoured scale insects. After graduation, he remained at Hokkaido University and taught, first as an associate professor and then as a full professor. Takagi's morphological insights have been proven correct by subsequent molecular analysis. Among other things, he demonstrated the polyphyletic nature of the now-obsolete Rugaspidiotini using morphology. Takagi retired from teaching in 1996, but continues to publish.


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* 1932 births Japanese entomologists Living people {{entomologist-stub