Roosiani, Indun, Muhammad Rizky Firdaus, and Herlina Sunarti. “Efektifitas Program Nihongo Jikan Bagi Pemagang Jurusan Bahasa Jepang Di Perusahaan Ozora Publishing Company Jakarta”. IDEA : Jurnal Studi Jepang 7, no. 2 (December 17, 2025): 83–91. Accessed January 21, 2026. https://idea-fisib.unpak.ac.id/index.php/Idea/article/view/14.