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Kazuya Kojima is the bassist and leader of back number. He plays a crucial role in shaping the band's musical direction and overall performance.

Kazuya Kojima is the bassist and leader of the Japanese rock band back number. He is also one of the band's main songwriters and composers, contributing significantly to their distinctive sound and lyrical themes.

Early Life

Information about Kazuya Kojima's early life, including his date and place of birth, is not readily available publicly.

Career

Kazuya Kojima formed back number in 2004 with vocalist and guitarist Iyori Shimizu and drummer Hisashi Kurihara. He plays bass and is a key songwriter and composer for the band. back number gained popularity through independent releases and extensive touring, eventually signing with a major label and achieving mainstream success in Japan. They are known for their emotional ballads and rock anthems, many of which have been featured in popular dramas and films.

Endorsements

Information regarding endorsements by Kazuya Kojima is not readily available.

Personal Life

Kazuya Kojima maintains a relatively private personal life. Details about his family and relationships are not publicly known.

Awards

Information about specific awards won by Kazuya Kojima or back number as a whole is not readily available in English sources. However, their commercial success and popularity indicate significant recognition within the Japanese music industry.

Thumbnail for back number
Official YouTube channel for Japanese rock band back number. Watch our music videos, live performances, and behind-the-scenes content.
This member has no known spouses listed yet.Know their history? Help us add some info!
This member has no known family listed yet.Know their history? Help us add some info!
Who is Kazuya Kojima in relation to the YouTube channel "back number"?
Kazuya Kojima is the bassist and leader of the band back number, whose official YouTube channel is @backnumberchannel.
What role does Kazuya Kojima play in back number?
Kazuya Kojima is the bassist and leader of back number.
Is Kazuya Kojima involved in the creative direction of back number's music?
Yes, Kazuya Kojima plays a crucial role in shaping the band's musical direction.
Does Kazuya Kojima contribute to back number's overall performance?
Yes, Kazuya Kojima plays a crucial role in shaping the band's overall performance, in addition to his role as bassist.
When did the "back number" YouTube channel join the platform?
The "back number" official YouTube channel (@backnumberchannel) joined YouTube in April 2020.
What are Kazuya Kojima's YouTube stats across all credited channels?
As of 2025, Kazuya YouTube channels collectively have over 68.5M subscribers, more than 79,344.8M views, and have uploaded over 6.1K videos.
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First name
Kazuya

Last name
Kojima

Birthdate
December 21, 1984

Age 40

Location
JP

Years active
2020 - present

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