For expressing annoyance or frustration:
* ちくしょう (chikushou): This is a strong expression of annoyance or frustration, similar to "damn" in English.
* くそ (kuso): This is a very vulgar word meaning "shit," and is considered extremely offensive.
* うっせー (usse): This is a casual and rude way to express annoyance, similar to "shut up" or "stop it."
* うざい (uzai): This means "annoying" or "irritating."
For expressing mild surprise or disappointment:
* しまった (shimatta): This means "oops" or "I messed up," and can be used when you've made a mistake.
* やれやれ (yareyare): This is a sigh of resignation or disappointment, similar to "oh dear" or "well, this is frustrating."
For expressing something is a pity or unfortunate:
* 残念 (zannen): This means "regrettable" or "unfortunate," and can be used to express disappointment.
* もったいない (mottainai): This means "wasteful" or "a shame," and can be used when something is being wasted or not utilized.
The best way to choose the right expression is to consider the context and the level of formality.
Remember: It's important to be aware of the cultural context and the potential offensiveness of certain expressions.