漢字 (kanji): Chinese characters used in Japanese writing system. Kanji characters represent words or concepts rather than sounds.
カタカナ (katakana): Another script used in Japanese writing system. Katakana is mainly used for foreign loanwords or onomatopoeic words.
五十音図 (gojuuonzu): The chart that organizes hiragana and katakana characters based on their sounds. It helps learners understand the phonetic structure of the language.