CLIL jissen gaidoYukiko Okuno, Kobayashi, Akiko (College teacher), Shizuka Motoda · First published 2022Open the Tome
Nihongo x sekai no kadai o manabuYukiko Okuno, Akiko Kobayashi, Reiko Satō, Shizuka Motoda, Tomoko Watanabe · First published 2021Open the Tome
Uda-in no utaawase shinchūAsako Miki, Yōko Okuno, Rie Kishimoto, Yukiko Esaka · First published 2019Open the Tome
Authentic JapaneseOsamu Kamada, Yukiko Okuno, Kumiko Kaneniwa, Michie Yamamori · First published 2013Open the Tome
Daini gengo shūtoku katei ni okeru gengo tenʾi no kenkyūYukiko Okuno · First published 2005Open the Tome
