Japanese · Pronunciation Guide
ya-sa-shi-i, four beats — note the s and sh are different sounds, and the final i is long.
yasashii
Four morae, with the last two given to the long vowel. What makes this word distinctive is the sa-shi pairing — two sibilants in a row that must be audibly different — and English speakers, who have both sounds, still tend to blur them when they're adjacent. Keep the beats even and the consonants distinct.
Listen: 優しい
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田中さんの友達は優しい人ですね。
Tanaka-san no tomodachi wa yasashii hito desu ne.
Tanaka's friend is a kind person, isn't she?
Listen: 田中さんの友達は優しい人ですね。
Free browser voice. Hear it read by a real native speaker inside the LingoDrop app.
田中さんの友達は優しい人ですね contains さん and 友達 before the adjective, and 人 (hi-to) after it with a palatal h. It's a long sentence, and the temptation is to accelerate through the middle to reach the point — but 優しい's long final vowel needs its two counts regardless of how far into the sentence you are.
"ya-sa-SHEE" puts an English stress peak on the end and clips the vowel — losing a mora and adding emphasis simultaneously. Level all four beats and hold the closing i. The other subtle error is starting the word with a two-beat "ee-ya"; ya is a single mora, one gesture from glide straight to vowel.