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西山宏太朗 engagement report

@Koutarotaro - 546K followers on X

Measured over 13 original posts from a 30-day window, last computed on August 27, 2026.

Engagement

Top quarter for its size
Per follower
0.14%
of 546K followers
Per impression
0.495%
154K views on a typical post
Reach
28.2%
of its followers see a post
Typical post
762
interactions (median)
Saved
0.019%
30 bookmarks on a typical post
Posting rate
1.7/day
active 47% of days
Peak time
09:00 UTC
Sunday

A typical post picks up 762 interactions against 546K followers, an engagement rate of 0.14%. Measured over 13 original posts, its engagement rate beats 76% of 3,882 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 154K times each, and 0.495% of those impressions turn into an interaction. That is about 28.2% of the follower count, which is the gap between an audience on paper and an audience in a timeline. Posting runs at about 1.7 posts a day over the last 30 days, with activity on roughly 47% of days. Most posts go out around 09:00 UTC, and Sunday is the busiest day of the week. Of the 13 posts sampled, 77% carry an image or video and 46% link out. The account's strongest tracked post pulled 15K interactions, about 20x its own typical post. Recurring topics include #西山宏太朗, #ハロラボ, #ワンワラ.

Measured over 13 original posts from a 30-day window, last computed on August 27, 2026. Recurring tags: #西山宏太朗, #ハロラボ, #ワンワラ.

Compared with accounts its own size

西山宏太朗's engagement rate beats 76% of the tracked X accounts closest to it in follower count (3,882 accounts, accounts of similar size (decile 8 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 34% 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 0.14%, 西山宏太朗 sits above the 50th percentile of the 37,582 accounts in this comparison. That places it in the above the median band, which runs 0.081% to 0.439%.

p100.002%
p250.012%
p50 (median)0.081%
p750.439%
p902.10%
p99158.1%
Engagement rate as a share of followers, across the 37,582 accounts we have scanned enough to measure. The axis is logarithmic, because the top and bottom of this population are about 105,409 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 percentile0.002%
25th percentile0.012%
50th percentile0.081%
75th percentile0.439%
90th percentile2.10%
99th percentile158.1%

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 09:00 UTC, and Sunday 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: 09:00 UTC.
0003060912151821
Above the authors' own mediansBelowScale: plus or minus 6%Busiest hour: 09:00 UTC
Show engagement by hour posted, utc as a table
Engagement by hour posted, UTC
Hour (UTC)Vs author medianPosts
00:00 UTC-1%52K
01:00 UTC-2%53K
02:00 UTC-3%51K
03:00 UTC-4%55K
04:00 UTC-6%44K
05:00 UTC-4%43K
06:00 UTC-4%50K
07:00 UTC-5%54K
08:00 UTC-4%62K
09:00 UTC-3%72K
10:00 UTC-2%74K
11:00 UTC-3%81K
12:00 UTC-2%89K
13:00 UTC-2%98K
14:00 UTC-4%101K
15:00 UTC-2%104K
16:00 UTC-3%102K
17:00 UTC-3%94K
18:00 UTC-1%88K
19:00 UTC-2%83K
20:00 UTC-1%77K
21:00 UTC-1%68K
22:00 UTC-2%59K
23:00 UTC-2%53K
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: Sunday.
SunMonTueWedThuFriSat
Above the authors' own mediansBelowScale: plus or minus 5%Busiest day: Sunday
Show engagement by day of week as a table
Engagement by day of week
DayVs author medianPosts
Sunday+5%237K
Monday0%300K
Tuesday-3%299K
Wednesday-1%256K
Thursday-1%249K
Friday-3%258K
Saturday+3%232K
See what moves engagement across the whole catalogWhat counts as a good engagement rate at this size

Best tweets

  • Aug 9, 202620x their median

    先日ちいかわ前情報ゼロで観てきました、、、ほんとにほんとに色々びっくりしたんだけど、もう一回観たい、、シール欲しい、、セイレーンちゃん推しです https://t.co/0rvl4m0HEm

    14K1.0K29155299K viewsView on X
  • Aug 18, 202616x their median

    🤦‍♀️ https://t.co/ALpZL6PjeM

    12K5502136193K viewsView on X
  • Aug 10, 20262.7x their median

    本日の『 #羽多野るるる 』 夏休みスペシャルをご覧いただいた皆さん❗️ ありがとうございます😊 ゲストの宏太朗と健人のおかげで、めちゃくちゃ盛り上がりましたね〜❣️ 僕らも童心に帰って楽しみました。 おまけ動画、今月から2本です🥳 お楽しみに。 https://t.co/6pMsvC40rn

    1.7K234736115K viewsView on X
  • Jul 4, 20262.4x their median

    ナレーションのボイスサンプルが新しくなりました! https://t.co/CL1CtFXRWV

    1.7K1661411100K viewsView on X
  • Aug 10, 20261.7x their median

    / 深夜1時から 今夜の #ハロラボ は! \ 🔍ConChu!「ニンミンフレンズ」 大昆虫展アンバサダーとして誕生した特別ユニット「ConChu!」 研修生時代の同期!?昆虫たちの関係性も注目👀 昆虫世界の楽しい楽曲についても解説☝️ 🎤ロージークロニクル「夏のイナズマ」 夏にピッタリな疾走感あふれるサウンドとパフォーマンスをスタジオで披露⚡️ ⚠️BSテレ東でのOAは8/21(金)25:29~ #ハロプロ #ConChu #大昆虫展 #ロージークロニクル

    1.1K219312154K viewsView on X
  • Aug 18, 2026

    本日22時🕙から #一橋綾人 #江口拓也 #西山宏太朗 禁断尻ラジオ https://t.co/ovhLvdhxgJ あと2️⃣時間ちょっとで 生配信始まります 👀リアタイ視聴推奨 ですが… ちょっと難しいという方は 視聴予約お忘れなく! 夜勤事件やりますよー https://t.co/iD38vaWGB1

    887156034340K viewsView on X
  • Aug 15, 2026

    #梅原裕一郎 Saturday Machiavellism nightイベント」 日程は9月19日(土) 場所は愛知県・安城市民会館サルビアホール チケットの先行抽選申込は明日、8月16日(日)お昼12時から! ゲストは #西山宏太朗 さん、#田所陽向 さん   詳細は以下から! https://t.co/fbSyYdYDhF #梅SMn #梅原王国

    642129123174K viewsView on X
  • Aug 9, 2026

    【情報解禁】大井町クリームソーダPresents VOL.22“READING!” 「ゴーストライター&ラブストーリー」   脚本・演出 入江玲於奈 2026年12月24日、25日、26日、27日 シアターグリーンBIG TREE THEATER   出演(五十音順) 相羽あいな 入江玲於奈 小田柿悠太 狩野翔 清都ありさ 後藤沙緒里 谷口悠 中島ヨシキ 西山宏太朗 濱野大輝 藤井ゆきよ 松﨑菜々 矢野奨吾 山村響   本作はダブルキャスト、トリプルキャストがあるしゅわ。出演日はまたお知らせするしゅわ〜🌸お楽しみにしゅわ! #ゴスラブ #大クリ

    441234087221K viewsView on X
  • Aug 6, 2026

    『森永彩斗の全力ライフ!!』生放送#34【出演:森永彩斗 ゲスト:西山宏太朗】 ご視聴ありがとうございました! 今回はクイズとパラパラの融合企画でした🕺🪩🕺 写真はガラケーで撮影📷✨ ニコニコ:https://t.co/Y5QbkWco2g Youtube :https://t.co/ow1x6K6vPn #森永全ラ https://t.co/aNWBK4a1bS

    24869324149K viewsView on X
  • Aug 9, 2026

    さよなら、ボナペティ シネマツアー in TOKYO FINAL開催決定✨ 2026年10月11日 イオンシネマ板橋 ①11時〜本編上映後、トークショー ②15時〜トークイベント(本編の上映はありません) なんと❣️キャスト大集合しゅわ👀🎊 谷口悠 花房李彩 入江玲於奈 西山宏太朗 狩野翔 小田柿悠太 山村響 鈴木裕斗 松﨑菜々(2部のみ出演) 倉田哲朗(2部のみ出演) チケットの詳細はまたお知らせするしゅわ〜! #さよボナ #大クリ

    2088903298K 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

#西山宏太朗#ハロラボ#ワンワラ#茉莉花官吏伝#羽多野るるる

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 762 interactions against 546K followers, an engagement rate of 0.14%. Measured over 13 original posts, its engagement rate beats 76% of 3,882 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 154K times each, and 0.495% of those impressions turn into an interaction. That is about 28.2% of the follower count, which is the gap between an audience on paper and an audience in a timeline. Posting runs at about 1.7 posts a day over the last 30 days, with activity on roughly 47% of days. Most posts go out around 09:00 UTC, and Sunday is the busiest day of the week. Of the 13 posts sampled, 77% carry an image or video and 46% link out. The account's strongest tracked post pulled 15K interactions, about 20x its own typical post. Recurring topics include #西山宏太朗, #ハロラボ, #ワンワラ.

What is 西山宏太朗's engagement rate on X?
西山宏太朗 (@Koutarotaro) has an engagement rate of 0.14%, based on the median interactions across 13 original posts from the last 30 days against 545,564 followers. Replies, reposts and quote-posts of other people are excluded from that sample.
Is that a good engagement rate?
At 0.14%, 西山宏太朗 sits above the 50th percentile of the 37,582 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 @Koutarotaro have real engagement?
Its engagement rate beats 76% of the tracked X accounts closest to it in follower count (3,882 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 @Koutarotaro post?
Most posts go out around 09:00 UTC, and Sunday is its busiest day, at roughly 1.7 posts per day across the measured window.

Keep going

西山宏太朗 (@Koutarotaro) Engagement Rate - 0.14% | PlayerSells