Nihongo keigo hyougen no shiteki tenkai ni tsuite no kenkyuu : sonja teii juushi no keigo kara jiko teii juushi no keigo e

Nihongo no shuujoshi 「 yo 」 「 ne 」 「 yone 」 ni tsuite : nihongo kyouiku no shiten kara

Hotai kougeki kara no jiko bougyo kikou ni kansuru kenkyuu

Zenshinsei jiko meneki shikkan ni okeru jiko koutai no hyouteki bunshi to sono Bsaibou outou ni tsuite no kenkyuu

Kōpasu kara no teikei hyougen no jidou chuushutsu ni kansuru kenkyuu

Jiko soshikika tokuchou shazou ni okeru isou hoji sokudo no kenkyuu

Shizen gengo ni yoru dētabēsu toiawasebun no imi hyougen houhou to sono nihongo toiawase shisutemu e no ouyou ni kansuru kenkyuu

Juushou kinmuryokushou ni okeru jiko koutai no tokusei to kyousen ijou ni kansuru bunshi seibutsugakuteki kenkyuu

Kaiteki jiko pēsusou ni yoru shinriteki sutoresu teigen kouka ni kansuru kisoteki kenkyuu : tokuni undou ni tomonau pojitibuna kanjou no henka ni tsuite