Why does this unvoiced ほ sound become a voiced ぼ sound?


I've seen a couple videos of a Japanese translation of the song Twinkle
Twinkle Little Star. This Japanese version is titled 「きら きら ぼし」. However, star
is 「ほし」.

Why is the ほ sound voiced in the title?

Example of this: <http://blogs.transparent.com/japanese/twinkle-twinkle-
little-star-in-japanese/>




From <https://en.wikipedia.org/wiki/Rendaku>

> Rendaku (連濁?, lit. "sequential voicing") is a phenomenon in Japanese
> morphophonology that governs the voicing of the initial consonant of the
> non-initial portion of a compound or prefixed word. In modern Japanese,
> rendaku is common but at times unpredictable, with certain words unaffected
> by it.

_Rendaku_ is the changing of voicing that, in practice, is usually the
addition of a _dakuten/tenten_ to the first syllable of a word contained
within a compound or phrase.

As mentioned above; rendaku occurs commonly but is unpredictable, in that
there isn't any fit-all rule that determines when it applies. However, rendaku
commonly appears in words involving the _noma_ iteration mark (々) indicating
repetition of the prior character, such as in _hitobito [人人/人々、ひとびと, not
hitohito]_ and _samazama [様様/様々、さまざま, not samasama]_

In your example, _きらきらぼし_ is considered a single phrase in that _きらきら_ is a
modifier describing _ほし_.




From <https://en.wikipedia.org/wiki/Rendaku>

> Rendaku (連濁?, lit. "sequential voicing") is a phenomenon in Japanese
> morphophonology that governs the voicing of the initial consonant of the
> non-initial portion of a compound or prefixed word. In modern Japanese,
> rendaku is common but at times unpredictable, with certain words unaffected
> by it.

_Rendaku_ is the changing of voicing that, in practice, is usually the
addition of a _dakuten/tenten_ to the first syllable of a word contained
within a compound or phrase.

As mentioned above; rendaku occurs commonly but is unpredictable, in that
there isn't any fit-all rule that determines when it applies. However, rendaku
commonly appears in words involving the _noma_ iteration mark (々) indicating
repetition of the prior character, such as in _hitobito [人人/人々、ひとびと, not
hitohito]_ and _samazama [様様/様々、さまざま, not samasama]_

In your example, _きらきらぼし_ is considered a single phrase in that _きらきら_ is a
modifier describing _ほし_.

