本研究はシャドーイングのアプリ ‘Ganbatte Shadowing’ を活用した長期的実践研究である。日本語学習者が練習内容や練習期間を主導的に選択し、教師はファシリテータ-としてフィードバックだけを与えていた。 シャドーイング練習の効果を確認するために、ネイティブ日本語教師と日本語学習者両側から分析している。BSはシャドーイングを練習の効果が部分的に認められたが、KS、KMは改善された点より改善されなかった点が多く残っていることが確認された。長期的な調査を通して、BSは泊、特定の発音が改善されない点、KSの場合アクセントが改善されない点が明らかになった。今後日本語指導に反映することができると思われる。 内省ノートの分析からは日本語学習者３人ともシャドーイング練習でスピードと内容の理解に関してはシャドーイング練習の効果を感じていると確認された。

This study is a long-term practice study using an "Ganbatte Shadowing"app. The Japanese instructors' evaluation and the learners' reflection notes were analyzed for reviewing the effect of shadowing practice. As a result of qualitatively analyzing shadowing practice in a long-term practice study, the effect of shadowing practice was partially recognized as advanced learner continued shadowing practice. Unfortunately, although some improvements have been made for an intermediate learner and beginner learnerr, there are still many unimproved areas. Therefore, it can be said that the shadowing effect is insignificant. Through a long-term study, however, it was found that the beats and specific pronunciations were still not improved for an advanced learner, and the accents were not improved the most for an intermediate learner. Since we were able to identify the characteristics and misuse of learners' pronunciation through long-term shadowing practice research, we expect that it will be reflected in the pronunciation guidance of learners. Further more, it was found that learners were able to identify their own problems while listening to the voice recorded by themselves and writing reflection notes, and felt that their intonation, pronunciation, and accent were improved through long-term practice.