Carex arisanensis var. tremula Ohwi accepted as Carex filipes var. tremula (Ohwi) Ohwi (original description)
Carex autumnalis Ohwi (original description)
Carex blepharicarpa var. stenocarpa Ohwi accepted as Carex hirtifructus Kük. (original description)
Carex chinensis var. tsushimensis Ohwi accepted as Carex tsushimensis (Ohwi) Ohwi (original description)
Carex cucullata (Kük.) Ohwi (new combination reference)
Carex formosensis var. vigens (Kük.) Ohwi accepted as Carex genkaiensis Ohwi (original description)
Carex geantha Ohwi accepted as Carex jacens C.B.Clarke (original description)
Carex gotoi Ohwi (original description)
Carex hidewoi Ohwi accepted as Carex lehmannii Drejer (original description)
Carex hondoensis Ohwi (original description)
Carex kiusiuana Ohwi accepted as Carex chrysolepis Franch. & Sav. (original description)
Carex kobomugi Ohwi (original description)
Carex levicuspis Ohwi accepted as Carex kattaeana Kük. represented as Carex ×kattaeana Kük. (original description)
Carex lonchophora Ohwi (original description)
Carex lutchuensis Ohwi accepted as Carex breviscapa C.B.Clarke (original description)
Carex maximowiczii var. kinashii Ohwi accepted as Carex maximowiczii Miq. (original description)
Carex maximowiczii var. levisaccus Ohwi accepted as Carex maximowiczii Miq. (original description)
Carex mayebarana Ohwi (original description)
Carex mitoensis Ohwi accepted as Carex otaruensis Franch. (original description)
Carex mitrata var. aristata Ohwi (original description)
Carex morrowii var. expallida Ohwi accepted as Carex morrowii Boott (original description)
Carex morrowii var. laxa Ohwi accepted as Carex anbouensis Katsuy. (original description)
Carex multifolia Ohwi (original description)
Carex nanella Ohwi accepted as Carex callitrichos var. nana (H.Lév. & Vaniot) S.Yun Liang, L.K.Dai & Y.C.Tang (original description)
Carex oxyandra (Franch. & Sav.) Kudô (new combination reference)
Carex oxyandra var. lanceata (Kük.) Ohwi (original description)
Carex papillaticulmis Ohwi accepted as Carex insaniae var. papillaticulmis (Ohwi) Ohwi (original description)
Carex perangusta Ohwi accepted as Carex discoidea var. perangusta (Ohwi) Katsuy. (original description)
Carex persistens Ohwi (original description)
Carex persistens var. takeuchii Ohwi accepted as Carex dispalata subsp. dispalata Boott (original description)
Carex spongiosa Ohwi accepted as Carex arenicola F.Schmidt (original description)
Carex subcernua Ohwi (original description)
Carex subdita Ohwi accepted as Carex insaniae var. subdita (Ohwi) Ohwi (original description)
Carex tashiroana Ohwi (original description)
Carex tenuinervis Ohwi (original description)
Carex uber Ohwi (original description)