- Donna toki do tsukau Nihongo hyogen bunkei 500 =Etsuko Tomomatsu
- New Kanzen Master Grammar Japanese Language Proficiency Test JLPT N1Etsuko Tomomatsu, Kaori Nakamura et al.
- New Kanzen Master Jlpt Grammar Bunpo Japanese Language Proficiency Test N4Etsuko Tomomatsu, Sachi Fukushima et al.
- New Kanzen Master Grammar Japanese Language Proficiency Test N3Sachi Fukushima, Etsuko Tomomatsu et al.
- 200 essential Japanese expressionsEtsuko Tomomatsu
- New Fully Master Listening Japanese Language Proficiency Test N4Kaori Nakamura, Sachi Fukushima et al.