Pronunciation of names?

[G0t0]

hideaki

Hee-deh-ack-ee
or
hye-dee-a-kee

[Silentcook]

This ought to resolve all your questions on the subject.
Myself, I have just found a new level of frustration at the silliness English can get away with.

[G3n0c1de]

hideaki

Hee-deh-ack-ee
or
hye-dee-a-kee

Hee-deh-ah-kee would be a close fit. The 'ee' sounds drag on longer in English than in Japanese, so imagine it as a shortened sound. Hi-de-a-ki would work if not for the ambiguities on how the vowels sound. Also, remember how the syllables work. They don't normally end in consonants, so 'ack' wouldn't work.

[Caesius]

This ought to resolve all your questions on the subject.

I laughed when I tried to get the Chinese one to say "tsundere."

[kascade]

I've only just 100%ted Katawa Shoujo (Still haven't unlocked that final image! :/ ) and one thing kept coming back to me.

I've never really known how to pronounce the main characters name!

Hi-sao, His-ao, H-is-ao ?

[Blackknight1239]

(Hee-sow); "-sow" sounding like "ow".

[pauper]

I always pronounched it like its written, but then in Dutch, im pretty sure its completely wrong but im used to say every asian word wrong

[Maakasu_Taihaku]

I always thought it was similar to Hiseo, like Hi Say o

[Shockproof Jamo]

Assuming OP's a native english speaker:

"He-sa-oh"

[Maakasu_Taihaku]

Assuming OP's a native english speaker:

"He-sa-oh"

ya thats my other opinion on how its pronouced.

He-say-oh

[Mirage_GSM]

What Jamo said.
Definitely not "Hi-say-oh"!

[Megumeru]

Hisao: He-sah-o
Shizune: She-zu-ne
Hanako: Ha-na-koh
Yuuko: You-co
Jigoro: Gee-go-roh
Akira: A-key-ra
Hideaki: He-deh-a-key
Satou: Sa-toh
Hakamichi: Ha-kah-me-chee
Tezuka: Teh-zu-ka
Ibarazaki: Ee-bah-ra-za-ki
Nakai: Na-ka-i

Let's see did I miss anyone else...? I think that's about it.

[dunkelfalke]

Why don't you just use IPA for pronounciation instead of the very ambiguous "english" syllables?

[Xerxes]

Hisao: He-sah-o
Shizune: She-zu-ne
Hanako: Ha-na-koh
Yuuko: You-co
Jigoro: Gee-go-roh
Akira: A-key-ra
Hideaki: He-deh-a-key
Satou: Sa-toh
Hakamichi: Ha-kah-me-chee
Tezuka: Teh-zu-ka
Ibarazaki: Ee-bah-ra-za-ki
Nakai: Na-ka-i

Let's see did I miss anyone else...? I think that's about it.

Shiina "Misha" Mikado: Shee-nah "Me-shah" Me-kah-doh.
Akio Motou: Ah-kee-oh Moh-toh
Meiko: May-koh
Iwanako: Ee-wanna-koh
Shinichi Nomiya: She-nee-chee Noh-me-yah
Kenji Setou: Ken-she (alt. ken-gee) Setoh

[Megumeru]

Why don't you just use IPA for pronounciation instead of the very ambiguous "english" syllables?

It's easier to pronounce them assuming people know how to read Hiragana and Katakana--then convert those names into such.

Pretty much that's how I pronounce them