Hiragana
"を" is
similar in pronunciation to
"wo" in English and
"오" in Korean.

Hiragana "を" has
the same pronunciation as "お".
It's shocking!
Why are there two identical pronunciations?

Good question.
Hiragana "を" is
used only as a particle for verbs.
It corresponds to "~을(를)" in Korean.

For example,
the "を" in "ご飯を食べる"
is the same as the "を" in "勉強をする".
<ご飯を食べる, 勉強をする> Circle the "を".

Hiragana "お" is used
for everything except the particle "を".
Use "を" for direct objects (~을/를),
and "お" for everything else!

How is it?
Pretty simple, right?