"Kanji Master Series" has been prepared for students who have mastered hiragana and katakana to learn and enjoy the process of learning kanji, the third group of characters in Japanese. Students who complete this series from N5 to N1 will learn 2,150 characters including 2,136 characters listed in the "Joyo (Daily-use) Kanji List" released on November 30, 2010 as well as 14 characters considered frequently used but not listed in the Joyo (Daily-use) Kanji List. This series is structured so that students can learn rich vocabulary and idioms as well as kanji. As sample words and sentences given in the textbook are selected from daily and familiar situations, students can acquire words and expressions commonly used in daily life as they learn the kanji characters themselves. For those who are from non-kanji regions, all the kanji in the textbook have ruby (small hiragana characters above the kanji) for easy learning. Because of that, students can grow their ability in kanji without feeling overwhelmed.