Okada, Algae Japon. [Exs.]
Okada, Y. [1 - [30]]

Duke University Herbarium Algae Collection
Catalog #: 202426
Kamiya, T. #s.n. 00 December 1952
Schizomeris leibleinii Kützing
Japan, Aichi, Iwatsu

Rutgers University, Chrysler Herbarium - Macroalgae Collection
Catalog #: CHRB0017408
Yoshi K. Okada #10 12 August 1947
Thorea okadae Yamada
Japan, Kyushu, Yunoo, Hishikari, Kagoshima-ken

Field Museum of Natural History
Catalog #: C0504600F
Yoshi K. Okada #s.n. 05 June 1938
Batrachospermum vagum var. keratophytum (Bory de Saint-Vincent) Sirodot
Japan, Nagano-ken, Honshū: Kirigamine

Field Museum of Natural History
Catalog #: C0504013F
Yoshi K. Okada #s.n. 12 October 1947
Thorea ramosissima Bory de Saint-Vincent
Japan, Kagoshima-ken, Kyūshū: Yunoo, Hishikari

University of Michigan
Catalog #: 1306124
Yoshikazu Okada #s.n. 12 October 1947
Thorea okadai
Japan, Hyogo, Kyushu: Yunoo, Hishikari, Kagoshima-ken