It depends on the native language, but many learners of Japanese struggle with perceiving double consonant and long vowel sounds. I have seen numerous students who have been calling Yosshī as "Yoshi." Despite repeatedly telling them it's "Yosshī," they failed to notice the difference. I believe it's very challenging to perceive sounds that don't exist in one's native language, but I think your ears will get used to it if you listen to it enough times. So, for those who find them difficult, pleas