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The 18th Generation Hello Pro Kenshuusei member, Sasaki Rikako, joined on March 31, 2013 at the Hello! Pro Kenshuusei Happyoukai 2013 ~3gatsu no Nama Tamago Show!~ concert.
- March 31, 2013: Joined
- October 4, 2014: Sasaki Rikako debuts in S/mileage as a third generation member.
- She was previously a member of the idol group SCK GIRLS.
- She participated in the Morning Musume 11ki Member "Suppin Utahime" Audition before joining Hello Pro Kenshuusei.
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