SBS

The SBS (short for 質問を募集するShitsumon o Boshū Suru, "I'm Taking Questions") is a question-and-answer column that began in volume 4 of the manga, in which Eiichiro Oda answers questions sent in by his fans, making jokes and sometimes telling useful information about the story and characters. It is here that the ages of the Straw Hat pirates were first revealed, as well as various facts about the story that are not immediately apparent (but nevertheless present) in the chapters themselves. Sometimes the information on the characters is just suggested in this section by the fans, to which Oda just agrees with them and makes it official; for example, Tashigi, Chopper and Robin's birthdays which were all fan suggestions. There are several running jokes throughout the SBS, including the fact that a reader always manages to start the SBS before the author can. The SBS was also where the author revealed the existence of the hidden characters Pandaman and Tomato Gang, who appear hidden in the background at many points during the series. Because of the nature of the SBS and the appeal of One Piece, Oda will get questions of all kinds of nature from the serious to silly and the 'mature'.

Straw Hat Pirates

 * Luffy, Zoro and Nami's Age: Vol 4; Chapter 27
 * Luffy not Killing Villians; Vol 4; Chapter 30
 * Zoro's Name Origin: Vol 4; Chapter 28
 * Nami's Bust Size; Vol 4; Chapter 31
 * Zoro talking with swords in mouth; Vol 5; Chapter 43
 * Luffy and Zoro's first/second name order; Vol 6; Chapter 47
 * Nami's 3 sizes; Vol 6; Chapter 49
 * Sanji's age;Vol 7; Chapter 55

Red-Haired Pirates

 * Shanks' Age: Vol 4; Chapter 27
 * Beckman and Roux names: Vol 5; Chapter 42

Alvida Pirates

 * Mirror on Alvida's ship; Vol 6; Chapter 47

Buggy Pirates

 * Buggy's hat; Vol 4; Chapter 28
 * Mohji's hair;Vol 4; Chapter 29
 * Buggy mouth closed; Vol 6; Chapter 49
 * Buggy's Devil Fruit limits; Vol 7; Chapter 58

Black Cat Pirates

 * Kuro's Shirt symbols; Vol 4; Chapter 31
 * Jango's chin; Vol 6; Chapter 45
 * Kuro's speed; Vol 7; Chapter 57

Baratie

 * Patty and Carne's names;Vol 7; Chapter 57
 * Zeff's moustache; Vol 7; Chapter 58

Marines

 * Word on Morgan's chin; Vol 5; Chapter 43
 * Morgan and Kuro; Vol 6; Chapter 50

Oda's Profile

 * Greatest treasure; Vol 4; Chapter 29
 * Character naming; Vol 4; Chapter 30
 * Animal appearances; Vol 4; Chapter 31
 * Personnel Profile; Vol 4; Chapter 33
 * Manga Artist decision; Vol 4; Chapter 33
 * Apprenticeship days; Vol 4; Chapter 33, Vol 6; Chapter 50
 * Hometown; Vol 6; Chapter 47
 * No of assistants; Vol 7; Chapter 55
 * Character emotion depiction; Vol 7; Chapter 57

Hidden/Background Characters

 * Itou Mikio;Vol 4; Chapter 32
 * Pandaman first mentioned; Vol 6; Chapter 47
 * Minatomo-san; Vol 7; Chapter 54

Series Information

 * Logo misunderstanding; Vol 5; Chapter 43
 * Lack of Shading Tone; Vol 5; Chapter 43
 * Chapter nos. in production; Vol 6; Chapter 46
 * Price; Vol 7; Chapter 57

Misc infomation.

 * How many Devil Fruits; Vol 4; Chapter 33
 * Gero Gero no Mi; Vol 6; Chapter 49
 * Female Pirates; Vol 6; Chapter 50
 * Samu Samu no Mi; Vol 7; Chapter 54