Many languages lack phonemic glottal stops, but regularly insert them. For example:
English invariably inserts glottal stops before utterance-initial vowels, and often before word-initial vowels when enunciating:
/ˈɔw ˈnɔw/ [/ˈɔwˈnɔ́ẁ/] 'Oh no!'
and also when needed to break up adjacent identical vowels:
/ði ˈir/ [ði̠ˈʔiɰ˞] 'the ear'
Japanese is similar, except it also allows a glottal stop utterance-finally, especially in emphatic utterances:
/ee/ [ʔèéʔ] ⟨ええ?⟩ 'huh!?'
This seems to be an under-studied phenomenon despite its widespread occurrence. Do you have any references comparing how this works in different languages?
⟩
and its pair are quite uncommon, they render as boxes for me in the question. There are at least two alternatives:〉
and〉
(〉 and 〉 without monospace font). The last is a CJK character so could be the correct one to use with Japanese?〉
is a compatibility character (canonically equivalent to the CJK one), so it shouldn't be used. The CJK one, U+3009, is apparently used as a sort of quotation mark in Chinese. There's also U+203A (single guillemet), which is also a quotation mark. The mathematical angle brackets⟨⟩
seem most semantically correct, and are what Wikipedia uses.