Yūichi Higuchi

1951

• Baka ni mieru Nihongo
• Atama ga ii hito no "jibun o takaku uru" gijutsu
• Atama ga ii hito warui hito no hanashikata
• Atama ga ii hito, warui hito no "iiwake" jutsu
• Dame-buka aho-jōshi no tsukaikata
• Hasshinryoku atama no ii hito no sabaibarujutsu
• Hontō ni tsukaeru Nihongo renshū nōto
• Kodomo ni "Nihongoryoku" o tsukeru hon
• Nihongoryoku hōkai
• Yobikō wa naze omoshiroi