1. Watashi (私): This is the most common and basic way to say "I" in Japanese. It is used in both formal and informal situations, and it is gender-neutral.
2. Boku (僕): This is an informal way to say "I" that is typically used by men and boys. It is not considered as polite as watashi, and should not be used in formal situations.
3. Ore (俺): This is a very informal and masculine way to say "I" that is typically used by men only. It is considered rude and should not be used in polite or formal situations.
4. Atashi (あたし): This is an informal way to say "I" that is typically used by women and girls. It is not considered as polite as watashi, and should not be used in formal situations.
5. Uchi (うち): This is a way to say "I" that is used when referring to oneself as part of a group. It can be used in both formal and informal situations.
6. Warera (われら): This is a formal way to say "I" that is used when referring to oneself as part of a group. It is typically used in written language or in formal speeches.