Ordinary I use (watashi) as I. This is the most standard I that can be used in any situation.

To tell the truth, I mostly use (ore) as I. This I is only used in usual life and never used in official situation or to senior person. Sometimes, I use (boku) as I. This word has the original meaning of "servant" but used at the situation of equal partner.
  There are a number of words for the pronoun I probably more than hundred if we include local tongue and also many a words for you. Can they be called pronouns? Here I prepared a table of I's

The use of male "I" and female "I" is not forced by laws. Sometimes younger people use interchangeably to make things funny.

* A remark is provided about the way of scripting japanese using a,b,c....

Expressions for I
word for I in chinese character	pronunciation	direct meaning	situation to be used	male	female
	watashi watakushi (atashi) (asshi)	I	This I is most proper expression in any situation for both male and female. The pronunciation "watakushi" sounds sort of formal and square but "watashi" is well used as formal expression. "atashi" is rather colloquial pronunciation. But females usually use this pronunciation because it sounds soft. "asshi" is a very colloquial pronunciation used by merchant and craftsmen.	standard	standard
	atashi watashi	concubine	can be distinguished only in literal expression and used only for female. This character has amiable and sexy impression.	never	yes
	ore (ora) (oira)	I	never used at official occasion or to a superior person. It is I for male. But in local tongue old females use this pronunciation. Pronunciation "ora" is heard only in local tongue. "oira" is an old style pronunciation sometimes used in comedies.	yes	no
	boku	servant	This I is for use to a superior person. But sometimes, it gives too intimate impression and used within well acquainted persons. This is the typical I of boys.	yes	never
	washi (wasshi)	I	This I sounds sort of arrogance mainly used to inferiors. The colloquial pronunciation used by craftsmen has no impression of arrogance. The pronunciation "washi" is probably an abbreviation of "watashi". It is said in older days, this word was mainly used by females. Nowadays only males use this word.	yes	in olderdays
	ware	I	This I is never used in conversation but only in literal expression. The plural form "wareware" is used to demonstrate the unity of a group. is a character that shows the continuation of the same character. Sometimes plural form is formed by it . However never or .	no gender but rather males are imaged
	jibun	myself, my part	Some people use this I to his superiors. This I has a tone of stressing self identity	yes	never
	shohsei	smalllife	Actually this I means humble myself. Not used in conversation but in literal expression.	yes	no
	wagahai	a guylike me	meaning is like humble myself but sounds stressing self identity. There is a famous nobel by Sohseki Natsume titled "Wagahai am a cat", a diary of a cat observing persons at a house.	yes	no
	uchi	(my)house	broadly used local tongue in western region, mostly used by females in stead of "atashi" This I has very intimate impression. Originally "uchi" is thought as the noun of 'in' or 'inner' then the meaning of 'something belong in me' or 'something belong to me', typically a 'home', 'house'. 'I' is also a typical belonging to 'me'.	rarely	yes
	wate (ate)	I	a local tongue in Kansai area. What is strange about this word is that it sounds decent if used by people of Kyoto area while it sounds vulgar if used by other area like Osaka. It is a standard I for Maiko the dancer (the highest grade of Geisha girl) 06/Jan/17 Recently someone came to this page searching for the literal meaning of Geisha. The meaning of Gei is art and the one of sha is person. So Geisha means artist but used only for female entertainers.	yes	yes
	wai	I	a local tongue in Kansai area as rather vulgar expression. Strangely enough, this word is also used for you. You must discern the two meaning according to the situation.	yes	rarely
	temae (teme-e)	front	An old word used by merchant and craftman. This word is also used for I (the guy in front of you) and you (the guy in front of me). "temee" is a rude variation.	yes	rarely
	ora	I	A local tongue in central Japan still used by old.	yes	yes
	oira	I	An old local tongue in central japan used among boys. It is a variation of "ora"	yes	never
	wachiki	I	An old word used by Geisha girl in Edo era	no	yes
	sessha	unskilledperson	Samurai the warriors used this word.	Samurai	never

   There are many other variations in local tongues.