By December 31, 2015, Sayashi Riho will have been in Morning Musume for 4 Years, 11 Months, and 29 Days. By this time, she will have been in the group longer than…
1st Generation Member Fukuda Asuka (1 Year, 7 Months)
2nd Generation Member Ichii Sayaka (2 Years)
1st Generation Member Ishiguro Aya (2 Years, 4 Months)
3rd Generation Member Goto Maki (3 Years, 1 Month)
1st Generation Member Nakazawa Yuko (3 Years, 7 Months)
8th Generation Members Junjun and Linlin (3 Years, 9 Months)
4th Generation Members Tsuji Nozomi and Kago Ai (4 Years, 3 Months)
6th Generation Member Fujimoto Miki (4 Years, 4 Months)
7th Generation Member Kusumi Koharu (4 Years, 7 Months)
and 5th Generation Member Konno Asami (4 Years, 10 Months)
That’s 12 out of 25 OG.
Had she planned her graduation to take place just 3 days later, she would have lasted longer than 5th Generation Member Ogawa Makoto. Had she planned her graduation just 4 days later, she would have lasted longer than 2nd Generation Member Yasuda Kei.
That would have been 14 out of 25 OG, more than half.