“leaf” in Japanese is 葉, read you, ha (よう, は). It is a Grade 3 Kyōiku kanji, taught in year 3 of Japanese elementary school, and appears in words such as 落ち葉 (fallen leaves).
What does 葉 mean?
秋に葉が赤くなる。
Same sound, different character — the classic trap. Compare them side by side: