You can say 'ii mon datta na' or 'sore WA umakatta'.
Sayonara .
You may say 'oshare' in Japanese; it means "fashionable," "stylish."
To say the word no one (meaning anybody, nobody, or no one) in Japanese you would say __. If you want to say no one and mean everyone or anyone you would say __.
yoi or ii
The way that you would say no one can understand me in Japanese is ________________. If you wanted to add the words but you to the end of no one can understand me, you would say _______.
If you meant to say "konichiwa" then it means good afternoon/good day in Japanese :L
Ohao Gozaimasu.
Ohayo (OHIO)
yoi shokuyoku
iie
Ichi.
鬼 /o ni/ is a good Japanese equivalent for what you are looking for.