Aritsune Toyoda

title	ISBN-13 (ISBN-10)	year of publication
Joshiki to hijoshiki: Sekai kara koritsusuru Nihonjin e	978-4-396-31054-7 (4-396-31054-4)
Kankoku ga kanji o fukkatsu dekinai riyu.	978-4-396-11282-0 (4-396-11282-3)	2012