Otsuka
The taxon authority O(h)tsuka may refer to:
- Hiroyuki Ōtsuka, Japanese palaeontologist
- Kazuhisa Otsuka (fl. 1985), lepidopterist
- Koichi Otsuka (born 1951; Otsuka), botanist
- Susumu Ohtsuka, Japanese copepodologist and ostracodologist.
- Yanosuke Ōtsuka, Japanese palaeontologist
- Yasushi Otsuka, Japanese entomologist
- Yuichiro Otsuka (2013; Y.Otsuka), mycologist