V6 is a six-member Japanese boy band formed by Johnny & Associates. They debuted on November 1, 1995 with their first CD-Single "MUSIC FOR THE PEOPLE".
Due to the difference in age between the six members, subunits were formed within the group. The three oldest members formed 20th Century (Tonisen, in short) whilst the youngest three formed Coming Century (Kamisen, in short).
As they are 'idols', each member takes part in a variety of activities - as well as singing, they appear in TV dramas, variety shows, host radio programmes etc. 20th Century are usually associated with being on stage in plays and musicals, whereas Coming Century are more often in TV dramas (although every member has done both).
There are many theories behind the meaning of the "V" in V6. It is said that it stands for Victory, but members have mentioned on TV programmes etc that it also means Volleyball (as their debut single was used in the World Cup Volleyball Tournament in 1995), Versus (20th Century versus Coming Century), Vegetable (as Sakamoto's parents own a green grocers), Vicycle (obviously means Bicycle - Nagano's parents own a Cycling store) and Veteran (as Inohara was told). It's mostly believed to stand for Volume, which derives from their album that they made.