Phonological terminology: what to call the /h/ → /p/ shift?


Japanese has various kinds of
[sandhi](https://en.wikipedia.org/wiki/Sandhi#Japanese) or
[連音](https://ja.wikipedia.org/wiki/%E9%80%A3%E9%9F%B3) ( _ren'on_ ), of which
[sequential voicing](https://en.wikipedia.org/wiki/Rendaku) or
[連濁](https://ja.wikipedia.org/wiki/%E9%80%A3%E6%BF%81) ( _rendaku_ ) is
probably one of the best known.

There's also [gemination](https://en.wikipedia.org/wiki/Gemination) or
[長子音化](https://ja.wikipedia.org/wiki/%E9%95%B7%E5%AD%90%E9%9F%B3) (
_chōshiinka_ ), where we get things like 学校 ( _ga **kk** ō_) from 学 ( _ga
**k** u_) + 校 ( _ **k** ō_).

Gemination with the //h// kana (outside of a few borrowings, like バッハ [ _Ba
**hh** a_, "Bach"]) generally also causes the //h// (or //ɸ//) to shift to
//p// instead. Things like 開けっ放し ( _ake **pp** anashi_) from 開け ( _ake_ ) + 放し
( _ **h** anashi_).

I just can't seem to find what this particular sound shift is called.

Does anyone here know the name for this //h// → //p// shift? Ideally in both
English and Japanese?

