Hideyoshi

Hideyoshi is
Hee (English pronoun “he” with a slight hissy sound for the “h”)
De (“d” with the “e” in “bed”)
YO (the “o” is a single vowel, not the English diphthong “o”)
Shi (English pronoun “she”)

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All syllables are pronounced in an even way.

It's pronounced hee-day-yoh-shee, all syllables evenly stressed.