Is the 'h' in Japanese pronounced the same as the 'f'?


I'm aware that the so-called 'f' in ふ isn't pronounced with the English
labiodental fricative [f], but rather the bilabial fricative [ɸ]. I'd like to
know if Japanese speakers also use the bilabial fricative to pronounce は, ひ, へ
and ほ. The reason I ask is because in romaji, I see these written as 'ha',
'hi', 'fu', 'he', 'ho', and wondered if ふ was a special exception in terms of
how it is pronounced.




It is most definitely an exception. The actual phonetic realisation of that
series goes like this:

は [ha]

ひ [çi]

ふ [ɸɯ~hɯ]

へ [he]

ほ [ho]

In Middle Japanese they all were pronounced with [ɸ], which you can see in
European transcriptions of names from the 1500s and 1600s - the Portuguese
wrote e.g. `<Faxecura>` for a name that in Modern Japanese would be
transcribed `<Hasekura>`. In Old Japanese and earlier this sound was [p], and
it still is [p] in most of the Ryuukyuus, e.g. in Miyako /pztu/ 'person'
(cognate with Modern Japanese /hito/).

The ɸ>h sound change hasn't quite finished for many speakers, and so /h/ for
them remains [ɸ] before /ɯ/. This probably has to do with the particular
details of how Japanese /ɯ/ is articulated - it's ultimately neither rounded
nor unrounded, but 'compressed': unlike a canonical [ɯ] your lips are pulled
together, but they're not pushed out like with [u]. (I'm writing the Japanese
version as <ɯ> anyway because there's no good transcription of the
'compressed' version.) [ɸ] is retained because your lips are doing mostly the
same thing that they're doing with the 'compressed' [ɯ].

For other speakers, the ɸ>h sound change is complete, and ふ is [hɯ].




It is most definitely an exception. The actual phonetic realisation of that
series goes like this:

は [ha]

ひ [çi]

ふ [ɸɯ~hɯ]

へ [he]

ほ [ho]

In Middle Japanese they all were pronounced with [ɸ], which you can see in
European transcriptions of names from the 1500s and 1600s - the Portuguese
wrote e.g. `<Faxecura>` for a name that in Modern Japanese would be
transcribed `<Hasekura>`. In Old Japanese and earlier this sound was [p], and
it still is [p] in most of the Ryuukyuus, e.g. in Miyako /pztu/ 'person'
(cognate with Modern Japanese /hito/).

The ɸ>h sound change hasn't quite finished for many speakers, and so /h/ for
them remains [ɸ] before /ɯ/. This probably has to do with the particular
details of how Japanese /ɯ/ is articulated - it's ultimately neither rounded
nor unrounded, but 'compressed': unlike a canonical [ɯ] your lips are pulled
together, but they're not pushed out like with [u]. (I'm writing the Japanese
version as <ɯ> anyway because there's no good transcription of the
'compressed' version.) [ɸ] is retained because your lips are doing mostly the
same thing that they're doing with the 'compressed' [ɯ].

For other speakers, the ɸ>h sound change is complete, and ふ is [hɯ].

