Kokugo goishi kenkyū /

by Maeda, Tomiyoshi, 1937-
Tōkyō : Meiji Shoin, 1985

Okashi no Nihongo bunkashi /

by Maeda, Tomiyoshi, 1937-, Okamura, Mariko
Ōsaka-shi : Izumi Shoin, 2023

Nihon gogen daijiten /

Tōkyō : Shōgakkan, 2005
Shohan.

Hōgen ni ikiru kogo /

by Katō, Masanobu, 1933-
Tōkyō : Nanʾundō, 1988

Nihon no hōgen to kogo /

by Katō, Masanobu, 1933-
Tōkyō : Nanʾundō, 1996

Kanji no hataraki /

Tōkyō : Asakurashoten, 2006