also: ああゆう · あーゆー · あーいう
expression, pre-noun adjectival
Pre-noun adjectival used to refer to something of the same type as previously mentioned or understood from context.
I've never seen that kind of person before.
I think that sort of approach is not good.
そういう refers to something near the listener or just mentioned ('that sort of'), whereas ああいう refers to something more remote from both speakers.
どういう is the interrogative form asking 'what sort of', while ああいう is the distal demonstrative form meaning 'that sort of'.
Kanji spelling, but kana is more common.
Irregular kana variant; not standard.
Derived from the distal demonstrative ああ (that) combined with いう (say), literally 'that which is called that way'. The exact historical development is uncertain.