Formal:
* 良い (ī) - This is the most common and general way to say "good" in Japanese.
* 素晴らしい (subarashii) - This means "wonderful" or "amazing" and is a more emphatic way to say "good."
* 優れ (sugureta) - This means "excellent" or "outstanding" and is often used in a formal setting.
Informal:
* いい (ī) - This is the casual form of 良い.
* 最高 (saikō) - This means "the best" or "awesome" and is a very informal way to say "good."
* いいね (ī ne) - This is an informal way to agree with someone and is a common way to say "good" in casual conversation.
Specific situations:
* おいしい (oishii) - This means "delicious" and is used to describe food that is good.
* 綺麗 (kirei) - This means "beautiful" and is used to describe something that is visually pleasing.
* 上手 (jōzu) - This means "good at something" and is used to describe someone's skill.
The best way to choose the correct word for "good" depends on the context and the level of formality required.