[UPPDATE]
Complete list - http://forums.sega.com/showthread.php?t=320111
3,4
I Wanna Go to Tokyo pt. 1
The Brewer's Treasure
Make the No. 1 Cabaret Club Girl!
English Conversation Solicitor step 1
English Conversation Solicitor step 2
Love's Cupid
Love's Cupid Continues
Love's Cupid Continues Again
A Trip Before Marriage
5
Manga Artist Debut (Mangaka Debut)
The Runaway Phone Chat Girl (Terekura Iede Musume)
I Wanna Go to Tokyo pt. 2
Great Genius Showdown
Is she talking about me...?
Ayukawa Rina***
6
A Satisfying Yakuza (Iyashiikei Yakuza)
9
The Mars Fighter Invades Tokyo (Toukyou Shinryaku Kasei Fighter)
10
Love's Cupid - The Finale (Koi no Cupid Kanketsuhen)
I Wanna Go to Tokyo pt. 3 (Toukyou ni Ikitai Dai 3 Hanashi)
English Conversation Solicitor step 3 (Eikaiwa no Kan'yuu step.3)
English Conversation Solicitor step 4 (Eikaiwa no Kan'yuu step.4)
This list is 100% accurate. After completing 100 quests, all the hitman missons and the IF7 fights, I am able to get the final quest, Amon.
There were 123 sidequests in RGG3, there are only 101 in Yakuza 3 (Including Amon).
Special thanks:
ThePatrick - Good guide, got all my references there
Sega Localization Team - Without them, this list wouldn't exist
RubyEclipse - For being a great PR guy
Brief Summary of other stuff
-“Loser” (Japanese theme song by Eikichi Yazawa)
-Wooing women in hostess clubs
-Hostess managing
-Rina Ayukawa (one of the hostess girls - 9/10 you can date)
-Mahjong mini-game
-Shogi mini-game
-Massage parlor mini-game
-Answer X Answer trivia game
-Limited mazgine viewing in convenience stores compared to the Japanese version
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