It's how Japanese call "convenience store".
It is a very casual form ... To be more polite you say ごめんなさい "Gomen Nsai"
To be even more formal, You say 申し訳ありません。"Moushiwake Arimasen"
If you bump into someone accidentally, you say 「すみません」
You can also use the sword to get attention of people when you want ask something.
"Sumimasen, Toire wa doko desuka?"
Execs me, where is the toilet.
So treat this tree (flower) very nice when you are in Japan.
You can simply say
The opposite of Suki is Kirai 嫌い きらい
This could mean two things. (1) I have myself. (2) I hate ___.
When you leave home, you say "Ite Kimasu"
People who hear that usually say "Itte Rassyai" いてらっしゃい
It is used a lot. Try not to be called this way.