Part of what makes English difficult to learn is that each letter in the alphabet can represent more than one sound. Plus, since the alphabet only has 26 letters yet represents 44 sounds, many English phonemes are represented by two or three letters working together to represent one sound.
All English sounds are made up of just 44-46 sounds, Japanese also has around 44 or so basic sounds, depending on how you define "basic". The average human can make over 500 distinct sounds of vowels and consonants