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磯山さやか engagement report

@sayaka23isoyama - 521K followers on X

Measured over 8 original posts from a 30-day window, last computed on October 17, 2026.

Engagement

Top quarter for its size
Per follower
0.408%
of 521K followers
Per impression
3.37%
63K views on a typical post
Reach
12.1%
of its followers see a post
Typical post
2.1K
interactions (median)
Saved
0.027%
17 bookmarks on a typical post
Posting rate
0.5/day
active 33% of days
Peak time
10:00 UTC
Saturday

A typical post picks up 2.1K interactions against 521K followers, an engagement rate of 0.408%. Measured over 8 original posts, its engagement rate beats 90% of 20,444 tracked accounts of a similar size. Comparing inside a size band matters here: engagement rate falls as accounts grow, so a raw rate would mostly just re-measure the follower count. Posts are seen about 63K times each, and 3.37% of those impressions turn into an interaction. That is about 12.1% of the follower count, which is the gap between an audience on paper and an audience in a timeline. Posting runs at about 0.5 post a day over the last 30 days, though only 33% of days saw any activity at all. Most posts go out around 10:00 UTC, and Saturday is the busiest day of the week. Of the 8 posts sampled, 50% carry an image or video and 25% link out. The account's strongest tracked post pulled 17K interactions, about 7.9x its own typical post. Recurring topics include #磯山さやか, #夜ドラ, #奥平大兼.

Measured over 8 original posts from a 30-day window, last computed on October 17, 2026. Recurring tags: #磯山さやか, #夜ドラ, #奥平大兼.

Compared with accounts its own size

磯山さやか's engagement rate beats 90% of the tracked X accounts closest to it in follower count (20,444 accounts, accounts of similar size (decile 10 of 10)). A percentile is spread evenly by construction, so 50 really is the middle of that group and 90 really is its top tenth.

On engagement per impression rather than per follower it beats 81% of the same group. When those two numbers disagree, the gap is about how far its posts travel rather than how people react to them.

Where this sits in the catalog

At 0.408%, 磯山さやか sits above the 50th percentile of the 204,880 accounts in this comparison. That places it in the above the median band, which runs 0.143% to 0.678%.

p100.004%
p250.024%
p50 (median)0.143%
p750.678%
p902.55%
p9982.4%
Engagement rate as a share of followers, across the 204,880 accounts we have scanned enough to measure. The axis is logarithmic, because the top and bottom of this population are about 22,891 times apart and a linear axis would flatten everything below the median into a single point.
Show the percentile table
Engagement rate percentiles
PercentileEngagement rate
10th percentile0.004%
25th percentile0.024%
50th percentile0.143%
75th percentile0.678%
90th percentile2.55%
99th percentile82.4%

This ruler is the whole measured catalog, not a size-matched group: it shows where the raw rate falls across every account we can measure, all of which are large. For a like-for-like comparison, read the size-band percentile above instead. See how the bands are built

Posting timing

This account posts most often around 10:00 UTC, and Saturday is its busiest day of the week. The bars below are the catalog-wide pattern, with this account's own busiest slot marked. They do not show how this account performs at each hour: we keep one aggregate per account, not one per hour, so that measurement does not exist in our data.

Engagement by hour posted, UTCTwenty-four bars, one per UTC hour. Each bar shows how posts published in that hour compare with their own authors' median engagement. Bars above the centre line ran higher than the median, bars below ran lower. A marker flags Busiest hour: 10:00 UTC.
0003060912151821
Above the authors' own mediansBelowScale: plus or minus 111%Busiest hour: 10:00 UTC
Show engagement by hour posted, utc as a table
Engagement by hour posted, UTC
Hour (UTC)Vs author medianPosts
00:00 UTC-1%89K
01:00 UTC-2%90K
02:00 UTC-3%88K
03:00 UTC-4%94K
04:00 UTC-5%76K
05:00 UTC-4%75K
06:00 UTC-5%86K
07:00 UTC-5%93K
08:00 UTC-4%108K
09:00 UTC-4%124K
10:00 UTC-3%129K
11:00 UTC-3%141K
12:00 UTC-3%154K
13:00 UTC-3%167K
14:00 UTC-4%173K
15:00 UTC-2%176K
16:00 UTC-3%171K
17:00 UTC-3%159K
18:00 UTC-2%149K
19:00 UTC-2%141K
20:00 UTC-1%131K
21:00 UTC0%116K
22:00 UTC-2%100K
23:00 UTC-1%90K
Engagement by day of weekSeven bars, one per weekday, Sunday first. Each bar shows how posts published on that day compare with their own authors' median engagement. Bars above the centre line ran higher than the median, bars below ran lower. A marker flags Busiest day: Saturday.
SunMonTueWedThuFriSat
Above the authors' own mediansBelowScale: plus or minus 111%Busiest day: Saturday
Show engagement by day of week as a table
Engagement by day of week
DayVs author medianPosts
Sunday+5%393K
Monday+1%483K
Tuesday-2%520K
Wednesday-3%472K
Thursday-2%430K
Friday-3%447K
Saturday+2%393K
See what moves engagement across the whole catalogWhat counts as a good engagement rate at this size

Formats this account uses

Its own posting mix on the left, and what each of those formats does across every account we track on the right. Only formats where the effect clears our publish test appear here, so an empty row is a format we could not measure rather than one that does nothing.

This account's posting mix compared with catalog-wide effects
FormatThis accountCatalog effect95% intervalAccounts behind it
Image or video50% of posts+111%+108% to +115%34K
Outbound link25% of posts-41%-42% to -40%32K
Typical length--3%-3% to -2%54K
  • 50% of this account's sampled posts carry an image or video. Across the catalog, posts with an image or video run 111% above the same accounts' other posts.
  • 25% of its posts carry a link off X. Across the catalog, posts with an outbound link run 41% below the same accounts' other posts.
  • Its average post runs 103 characters, which falls in the 80 - 180 characters band. Across the catalog, posts of 80 to 180 characters run 3% below the same accounts' other posts.

These are catalog-wide differences applied to this account's own posting mix, not a measurement of how each format performs for this account specifically. We keep one median per account, not one per format per account, so the second thing is not something this data can tell you.

Best tweets

  • Oct 9, 20257.9x their median

    10月22日発売 磯山さやかデビュー25周年写真集 『余韻』 表紙決定しました!いかがですか? ▶︎通常https://t.co/9lozMZWrFX ▶︎豪華版https://t.co/o1kmqH3b3Z 発売記念イベント会いに来てください! 日時:10月25日(土)12時〜 会場: 六本木 蔦屋書店2階 ▶︎https://t.co/G72Hmkem3K https://t.co/Yaw4JrX36q

    16K71631974779K viewsView on X
  • Sep 15, 20267.8x their median

    仰天ニュースで、カニアレルギーの子がカニカマスープの匂いでアレルギーが発症したとやっているけど、本当になる。湯気にも混じってるから、私は隣の人がカニクリームコロッケを食べてた時に、初めて匂うだけでも発症してビックリした。 それ以来、他の人がエビやカニを食べている時も気をつけています。

    14K2.0K1821841.0M viewsView on X
  • Oct 12, 20266.0x their median

    #CDTVライブライブ 本番直前ショットで実況中📸 大好評のフェス企画に #EXILE が登場! 🎊結成25周年🎊 オリジナルメンバー 松本利夫、ÜSA、 MAKIDAIが再集結😎🌟 「Choo Choo TRAIN」「Rising Sun」 「I Wish For You」「Lovers Again」など 全13曲を激アツライブ❤️‍🔥 #CDTV_EXILEフェス #TBS https://t.co/f3BAp37liI

    11K1.5K98456582K viewsView on X
  • Aug 7, 20263.9x their median

    Jリーグ開幕!! もう最高な試合でした!!!! ありがとう!! 声出しすぎて喉が痛い。 #鹿島アントラーズ https://t.co/t8RLehBrrS

    7.9K34115611159K viewsView on X
  • Jul 25, 20263.2x their median

    枕の争奪戦いまのところ負けております。 電気を消しに立った瞬間、この写真からさらに足を伸ばし8割取られました。 https://t.co/DVZT5ucrEt

    6.6K1171023257K viewsView on X
  • Jul 4, 20263.1x their median

    湿疹と1ヶ月以上お付き合いの中で、かゆみで起きちゃう日々が3週間くらいなんだけど、やっと少し良くなってきたかと思ったら新たに湿疹🥹 そして昨日からギックリ腰のような感じで、立っても座っても痛い。一難去ってまた一難。ギリッギリだけど負けないよう、気合い入れていなり寿司と唐揚げとりんごとカツサンドとミルクフランスを買ってきた!

    6.2K10432911302K viewsView on X
  • May 29, 20262.2x their median

    このあと8:30‼️ 『#土曜はナニする!?』は...📡   ㊗️今年25周年! 🚢東京ディズニーシー®︎大満喫スペシャル🚢   🌟 土ナニ豪華ゲスト陣が 東京ディズニーシーへ   あばれる君さん⚡️ M!LK 塩﨑太智さん🍼 3時のヒロインかなでさん🍴 磯山さやかさん🌸 =LOVE 大谷映美里さん💓 河合郁人さん🕺 谷まりあさん🦋   知っていると100倍楽しめる! 東京ディズニーシーを徹底攻略📚   💁‍♀️是非ご覧下さい💁‍

    5.8K6704564206K viewsView on X
  • Oct 3, 20262.8x their median

    石川投手 25年間おつかれさまでした! 本当にありがとうございました!! #swallows https://t.co/VzR3fXYjPh

    5.6K24597268K viewsView on X
  • Jul 28, 20262.4x their median

    余震がまだあるかもしれないので、身の安全を第一に、少しでも安心できる涼しい場所にいてください。みなさんと動物達の無事を祈っています。

    4.8K1781010125K viewsView on X
  • Aug 29, 20262.3x their median

    開幕4連勝!!!! #鹿島アントラーズ https://t.co/6hX7p6BEDr

    4.7K1499413136K viewsView on X

Ranked by total interactions across everything we have tracked for this account, which is a longer history than the 30-day window the rates above use. The multiple compares each post to this account's own median.

Recurring topics

#磯山さやか#夜ドラ#奥平大兼#税金で買った本#cdtvライブライブ

The most frequent hashtags in the sampled posts. They describe what this account writes about; they are not a performance signal, and the catalog-wide breakdown on the hub shows how little hashtag count moves.

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Reading these numbers

A typical post picks up 2.1K interactions against 521K followers, an engagement rate of 0.408%. Measured over 8 original posts, its engagement rate beats 90% of 20,444 tracked accounts of a similar size. Comparing inside a size band matters here: engagement rate falls as accounts grow, so a raw rate would mostly just re-measure the follower count. Posts are seen about 63K times each, and 3.37% of those impressions turn into an interaction. That is about 12.1% of the follower count, which is the gap between an audience on paper and an audience in a timeline. Posting runs at about 0.5 post a day over the last 30 days, though only 33% of days saw any activity at all. Most posts go out around 10:00 UTC, and Saturday is the busiest day of the week. Of the 8 posts sampled, 50% carry an image or video and 25% link out. The account's strongest tracked post pulled 17K interactions, about 7.9x its own typical post. Recurring topics include #磯山さやか, #夜ドラ, #奥平大兼.

What is 磯山さやか's engagement rate on X?
磯山さやか (@sayaka23isoyama) has an engagement rate of 0.408%, based on the median interactions across 8 original posts from the last 30 days against 520,520 followers. Replies, reposts and quote-posts of other people are excluded from that sample.
Is that a good engagement rate?
At 0.408%, 磯山さやか sits above the 50th percentile of the 204,880 accounts in this comparison. Those comparison accounts are all large ones, because our scanning cadence is weighted towards big accounts, so this is a ranking among peers of similar scale rather than a ranking across X.
Does @sayaka23isoyama have real engagement?
Its engagement rate beats 90% of the tracked X accounts closest to it in follower count (20,444 accounts), which puts it in the top quarter for its size group. Ranking inside a size band matters because engagement rate falls as accounts grow, so a raw rate would mostly re-measure the follower count. It is a starting point for a look at follower quality, not a verdict on it.
When does @sayaka23isoyama post?
Most posts go out around 10:00 UTC, and Saturday is its busiest day, at roughly 0.5 posts per day across the measured window.

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