TOBIRA II: Mayumi Oka, Junko Kondo, Michio Tsutsui, Yuta Mori, Tomoko Okuno, Yoshimi Sakakibara, Ayaka Sogabe, Masae Yasuda
TOBIRA II Workbook 1: Mayumi Oka, Junko Kondo, Yoshimi Sakakibara, Hiroyo Nishimura, Michio Tsutsui
TOBIRA II: Mayumi Oka, Junko Kondo, Michio Tsutsui, Yuta Mori, Tomoko Okuno, Yoshimi Sakakibara, Ayaka Sogabe, Masae Yasuda
TOBIRA II Workbook 1: Mayumi Oka, Junko Kondo, Yoshimi Sakakibara, Hiroyo Nishimura, Michio Tsutsui
TOBIRA II Textbook: https://textbooks.maruzen.info/products/tobira-2-beginning-japanese
TOBIRA II Workbook 1: https://textbooks.maruzen.info/products/tobira-ii-beginning-japanese-workbook-1-kanji-reading-writing
■Answer sheets
Answer sheets are available for download via the Workbook section on the TOBIRA website.
https://tobirabeginning.9640.jp/workbook/
■Answer keys
Instructors can access answer keys by registering through the Instructor Resources section on the TOBIRA website. An electronic version can otherwise be purchased and viewed separately.