maybe conversational Japanese lets more go unspoken. From the little Japanese I speak I've found that this is indeed the case. Japanese speakers will happily leave out subject, topic, or object of a sentence when it can be inferred from context.
Exactly, the less formal the japanese is, the more unspoken words are left to be guessed by the context... Another interesting thing about japanese is that because of the lower number of different syllables it's easier to understand in situations when it's not possible hear clearly (like on mobile phones when the reception is not good). I've remarked on it when living there and had a researcher working in the field c…
I have a theory that this is why the Japanese are so (seemingly) fond of portmanteaus. It makes it easier to smoosh words together.