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The story
Morning Musume ’26’s Rio Sakurai revealed in an interview that, four years after joining, she’s still the group’s youngest member since no 17th generation has come in yet — and the remark sparked discussion on 5ch’s Hello! Project board. Posters pointed out that in the old days members graduated fast, like Rika Goto after just 3 years or Yuko Nakazawa after 3 years and 7 months, whereas today members like Oda and Nonaka routinely rack up 10+ years — fueling debate over how much the idol world’s sense of “tenure” has shifted.
What people said
For now the 17th generation still hasn't come in, so I remain the youngest,
and it's stayed this way, with the senior members above me graduating one after another…
Nakazawa did 3 years, 7 months
Yasuda did 5 years
The golden-era members really packed a lot into a short time
As a member of the 16th generation, she was the only one to join solo.
For a young girl, 4 years should feel like "only" not "already"
The Platinum-era members did 10 years, and AKB's early lineup, Nogizaka, the Fukumura-Michishige era — everyone's loaded with 10-year veterans
By the old standard she'd still feel like she's only in year 2
Oda, Nonaka, Inoue, Tanimoto, Ono, Onoda, Akiyama
something like that
Back then, unlike now, time really did move fast
That was the era when you'd flip the channel and a Musume。 member would pop up somewhere. The density back then was insane.
Wait, Nogizaka's captain is 20?
Turning 20 (adulthood) pretty much meant graduating from being an idol
Like Yoko Nagayama or Shizuka Kudo
This part was originally three 12th-gen members, but Haga graduated last year and Nonaka's been on rehab leave since this year, so it was basically just Makino carrying it —
and then when Makino mysteriously no-showed at Hina Fes, Oda ended up singing it instead, and I lost it.
How many 10-plus-year veterans is this group even carrying at this point
Seriously, she's already a veteran
This really isn't on Sakurai though
Musume。's had this issue because the 9th/10th/11th gens stuck around without graduating for way too long
Even with the 9th/10th gens sitting on top like a lid, the 13th gen still properly trained the 15th gen as seniors by their 3rd year — so that excuse doesn't fly
If the argument is that Rairi lost her shot at "growing up" because the 15th gen, her seniors by 3 years, kept acting like the youngest, then I could just about buy that
Aren't there way too many head-scratcher picks from this audition? Endo too
Super visuals & star quality
Don't get that vibe from Homamei
Meanwhile Juice=Juice is off having fun knocking over dominoes
That jab's gonna sting like hell
Background and Key Points
Morning Musume’s roster has always been organized by “generation” (期) rather than by age — each recruiting round brings in a cohort numbered sequentially, from the four founding members in 1997 through today’s 16th generation. Rio Sakurai is unusual even within that system: she joined in June 2022 as the sole member of the 16th generation, and four years on, no 17th generation has been recruited, so she remains the group’s default “youngest” by seniority even as she turns into a four-year veteran. That gap matters for context — historically the group cycled members quickly, with stars like Yuko Nakazawa or Rika Goto graduating within three to five years, closer to the old idol-industry norm where turning 20 often meant leaving the business (as with Showa-era idols like Yoko Nagayama).
The thread’s real disagreement isn’t about Sakurai herself but about the cause of the industry-wide shift toward long tenures. Some posters blame Morning Musume specifically, pointing to the 9th–11th generation members who stayed active far longer than past cohorts and effectively delayed promotion for those below them; others push back, noting the 13th generation still managed to mentor the 15th generation properly within a few years, suggesting the “lid” explanation doesn’t fully hold. A broader thread of comments attributes the change to the music industry slowing down overall — fewer single releases, less turnover — pointing to similar 10-year-plus veterans at AKB48 and Nogizaka46 as evidence this is a wider trend, not a Morning Musume quirk. What’s left unstated is that Hello! Project’s “graduation” system, unlike a simple retirement age, has always been driven by individual choice and management timing rather than any fixed tenure rule, which is why comparisons across eras are inherently inconsistent.
*This article is compiled from excerpts and a summary of the 5ch (Hello! Project board) thread “Rio Sakurai: ‘It’s only been about 4 years since I joined too’”.
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