So many comments, lets see..
Its ok, i was waiting for your reply, to make sure it was true, your not the only one to say something like that. This case requires too much knowledge of japanese
Thanks, it means a whole lot coming from you
I suspect he ate earlier so it wouldn't affect him, plus i find it weird he didn't order something sweet after the 'spicy' ramen. He also had a hoodie on, if he knew he was coming for spicy ramen, why dress so warm?( it had to have a practical reason like for carrying items without suspicion, cover his face, etc) He didn't come for the ramen that's why. He also chose to smoke, probably to calm his nerves.
i agree
Thanks!
you answered what i was going to say, i had a more thorough deduction typed up that went through my thought process,but firefox failed me, so this is a quick one done in my impatience. Sorry if i didn't explain my reasoning properly. Another reason i came to this conclusion is because his right fist was clinched the whole time, its unnatural,along with the hoodie, facial expressions, and attitude, this made sense. the drink is even on the left side. The ash tray isn't because he was currently using it.
The candy conversation was about the victim gettin angry at our culprit for asking him (something like you killed whomever...years ago) The victim ranted on how the culprit laced candy with poison and killed someone and he was to take responsibility.
Your right, this is why Tooru did it, he didn't order any dessert because he didn't intend to stay long. Kogoro never stated who had which dessert if i'm not mistaken, the one without the dessert or rather, the one most prepared and isn't a detective is always our culprit. He expected an early dismissal if you will.
Your on the right track, just apply the significance of that info to the mystery.
@Karan
All we ask Karan, is when you want to share what people think at least give them credit for it, otherwise its simply plagiarism. we would appreciate that, i'm Detective Kudo over there too, and i thought those words sounded familiar.