There are 4 alphabets in Japanese: Hirigana (the one we'll be using, since it's basic), Katakana, Kanji, and Romaji (Romaji is mainly for learning the basics, so it's counted as a reject)
I'll only be writing the vowels in Hirigana.
No matter what word it is, the vowels will always sound the same!!
A (pronounced Ah) - あ
I (pronounced E) - い
U (pronounced Ooh) - う
E (pronounced Eh) - え (i think that's what it is)
O (pronounced oh) - お
Words in Romaji (i'm no sure what they are in hirigana)
Hai - Yes
iie - No
Kore - This
Ka - ? particle
Hajimemas hite - Nice to meet you (no space)
Konnichiwa - Hello
Sayonara - Goodbye
Ohayou - Good morning (informal)
Ohayou Gozaimasu - Good morning (formal)
Teacher/Doctor - Sensei
Mr./Mrs./Miss - ~san (they put this at the end of their last name, since in Japan they go by last names)
Boku - I (For boys, very casual)
Watashi - I
Watakushi - I (formal)
Jaa ne - See you
Konbanwa - Good Evening
Kun - Honorific for boys (similar to ~san)
Nani/Nan - What (You don't have to pronounce the I in Nani, so you can say Nan if you would like)
Sumimasen - Excuse me/I'm sorry
Desu/Des - Is, am, are... etc (Similar to what, you do not have to pronounce the u in Desu)
Wa - Subject particle (To mark the subject. Here's an example sentance: Kore wa neko desu)
Neko - Cat
Meishi - Business card
Douzo Yoroshiku - It's a pleasure
You may have noticed that there are different levels of how formal the word is. In Japan, they use different variations of the same words for how formal the event is. For example, if you were talking to your boss, you would use Ohayou Gozaimasu instead of Ohayou.
those are just the basics! There's more such as tentens and double-constants, but I don't want to get into those since its kind of confusing at first.