Ryoichi Takahashi

Ryoichi Takahashi (高橋 良一) (April 6, 1898—July 17, 1963) was a Japanese entomologist. His research focused on hemiptera, including aphids, whiteflies, and scale insects. He published more than 420 articles.

Taxa named after him include:
 * Takahashilecanium Kondo, 2005
 * Xenolecanium takahashii Kondo, 2005
 * Rhachisphora takahashii Martin & Lau, 2011
 * Melanaphis takahashii Skvarla et al., 2020
 * Aclerda takahashii Kuwana, 1932
 * Dicranomyia takahashii Alexander, 1920
 * Rhyacobates takahashii Esaki, 1923
 * Ormosia takahashii Alexander, 1919
 * Aleurotuberculatus takahashii David & Subramaniam, 1976
 * Aleyrodes takahashii Ossiannilsson, 1966
 * Rhinopsylla takashii Boselli, 1930
 * Setaleytodes takahashia Singh, 1933
 * Isotomurus takahashii (Yosii, 1940)
 * Asterobemisia takahashii Danzig, 1966
 * Dialeurolonga takahashi David & Jesudasan, 1989
 * Togepsylla takahashii Kuwayama, 1931