The Japanese Subjects: Part 1

Watashi　わたし 私

(!)This is used for normal situations and it is considered to be formal.　Mostly used by woman than men.
-Watashi ha Amerika jin desu　わたしはアメリカじんです || I am an American.
(!)"ha" in this sentence is pronounced "wa" due to it being a verb.
(!)notice that "ha" is equivalent to English's "To be" verb.
(!)Meaning of "ha" ( x )

I (AM) You (ARE)
We (ARE) He/She (IS)

1) "の", "no" is equivalent to the English: 's (ex. My, Your, His, Her, Dan's, Our)

-Watashi no namae ha Dan desu || My name is Dan.

Some examples:My ~ Watashi no 私の　わたしの

My ~ Ore no　俺の　おれの

My ~ Boku no　僕の　ぼくの
Your ~ Anata no　あなｔの
His ~ Kare no　彼の　かれの
Her ~ kanojo no　彼女の　かのじょの
Dan's ~ Dan no　ダンの
Our ~ Watashi tachi no　私たちの　わたしたちの

2) "名前', "なまえ", "namae", pronounced (nah-ma-eh), and it means "Name".
3) "Desu" is basically a spoken period and loosely means "is".
ex. Dan desu ~ (I) am Dan.
Inu desu ~ (It's) a dog.

Ore　俺　おれ (Masculine)

This is used mostly by men, and is considered informal (only use with close friends)
1) "俺", "おれ", "Ore" has the same meaning as "私", "わたし".

私はバカです。

わたしはばかです。
Watashi ha baka desu

I am an idiot.

俺はバカです。

おれはばかです。
Ore ha baka desu 

I am an idiot. 

2) However, "俺", "おれ", "Ore" can be vulgar when misused.
3) Females mostly don't use this term.

Jibun　"自分", "じぶん" - Self, Myself, Yourself

Definition 1: Used with the meaning of "Myself".

自分も分かりません。

じぶんもわかりません。
Jibun mo wakarimasen.

I don't understand, myself (also).
1) "Jibun", in this case, is used to explain how YOU feel and what YOU think of a certain matter.
2) "mo" is used after nouns and means, "Also".
More on "も" here.
Watashi mo ~ Me, too!
Anata mo? ~ You, too?
Kono Inu mo! ~ This dog, too!

3) "wakarimasen" is a verb that means, "Don't understand" 

End of Part 1... I will post Part 2 tomorrow.