Japanese Kanji
忒toku
excessive · too · very-usually of objectionable things
Extended kanji · 7 strokes
Excessive, too, very-usually of objectionable things, to err, to mistake, changeable.
忒 is a Extended kanji — used in Japanese names and specialised writing. With 7 strokes, it appears in classical literature, place names, and formal documents.
Start with hiragana and katakana — the foundation of Japanese reading.