Riamu Yumemi Fan Club #5909014

115

members (measured 9 Oct 2026, 03:51 UTC)

6 April 2020

created (per Roblox API)

10 August 2026

first measured by this register

Game fan groupsENidolm@sterfan communitygaming

Description

JOIN IF YOU LOVE RIAMU YUMEMI FROM THE IDOLM@STER

Written by the group; not a statement by this register.

Membership history

Growth

5 measurements spanning 49 days, net +1. Dots are measurements; the straight line between them is drawn to join them, not to claim we know the path taken in between — snapshots are recorded only when a count changes, so gaps mean “no change observed”, never “interpolated”. The vertical axis spans 113–119 and does not start at zero.

Measurement log — every members count we have recorded
Measured (UTC)	Members	Change
28 Sept 2026, 21:41	115	-1
29 Aug 2026, 21:21	116	-2
26 Aug 2026, 18:04	118	+3
25 Aug 2026, 21:52	115	+1
10 Aug 2026, 12:06	114	first reading

Ownership

Owned by @Riamu_Yumemi as measured.

Claimed by user #1087263584 — observed between sweeps, detected 10 Aug 2026, 14:09 UTC

Detection dates bound when a change was seen by this register, not when it happened.

Groups seen changing owner — the largest ever handed over and the most recent — are on the ownership transfers board.

Members we’ve seen

@Riamu_Yumemi — Riamu Yumemi (rank 255)

@motahs1 — Otahens (rank 1)

Takami (@Neko_Takami) — Otahens (rank 1)

airi (@nukiges) — Otahens (rank 1) terminated

Emby Yumemi (@robloxian4545) — Otahens (rank 1)

megluka (@KoolKay7676) — Otahens (rank 1)

n_n (@discon_nected) — Otahens (rank 1)

Thog (@Klownmaeda) — Otahens (rank 1)

Yamu (@Itsjustp0tat0) — Otahens (rank 1)

Reisen Inaba (@Lcorp_Sephirah) — Otahens (rank 1)

Daz (@TruthCore) — Otahens (rank 1)

Stream kuraisekai (@cuyite) — Otahens (rank 1)

@princessdarcey121 — Otahens (rank 1)

@Jorge_4545 — Otahens (rank 1)

Aspect (@MaliciousIntent327) — Otahens (rank 1)

nyamuchi (@givemenovacainee) — Otahens (rank 1)

PoweringTyranny (@Nix_Chaan) — Otahens (rank 1) terminated

Squishy_Tails (@July46462) — Otahens (rank 1)

IDontPayMyTaxes (@MizuYamu) — Otahens (rank 1)

medjed (@mymerrody) — Otahens (rank 1)

Tea (@hakanbeyi) — Otahens (rank 1)

emi (@kitq) — Otahens (rank 1)

A sample — only members this register has independently measured, highest rank first. Not the full roster.

Rank structure

Riamu Yumemi1

s0

Member114

Otahens113

Guest0

Roles and per-rank member counts as Roblox reports them (rank 0 = guest … 255 = owner).

Related groups

Groups whose measured members overlap with this one — a sample from our membership graph.

(学乱) Gakuran#416091513 · 5 shared members

meozi#9001398 · 5 shared members

Touhou UGC Store ~#35558992 · 5 shared members

＊ぴえんなお洋服＊#13112757 · 5 shared members

Riamu Yumemi Fans#7238520 · 5 shared members

Rock Panda Games#8252064 · 4 shared members

Moonbun#5263512 · 4 shared members

paramnesia#4613675 · 4 shared members

RBLX Cosplays#9994287 · 4 shared members

Touhou#6395213 · 4 shared members

Kiz's Guild#32424519 · 4 shared members

Catalog Avatar Creator#15102943 · 3 shared members

Open data

Download this group’s measured record — free to reuse with attribution: membership history (CSV) · full record (JSON)

Each file carries its licence and retrieval time inside it, and is generated from the same measurements shown above.