かずや@back number engagement report
@kojimakazuya - 246K followers on X
Measured over 6 original posts from a 30-day window, last computed on September 27, 2026.
Engagement
Early reading. We have captured 6 original posts for this account, below the 8 we require before treating a median as settled. The numbers above describe what we have seen so far, not a finished profile of the account.
A typical post picks up 4.4K interactions against 246K followers, an engagement rate of 1.77%. Posts are seen about 71K times each, and 6.14% of those impressions turn into an interaction. That is about 28.9% of the follower count, which is the gap between an audience on paper and an audience in a timeline. Posting runs at about 0.27 posts a day over the last 30 days, though only 13% of days saw any activity at all. Most posts go out around 08:00 UTC, and Saturday is the busiest day of the week. Of the 6 posts sampled, 50% carry an image or video. The account's strongest tracked post pulled 35K interactions, about 8.1x its own typical post. Recurring topics include #backnumber, #フジタユウスケ. Only 6 original posts have been captured so far, fewer than the 8 posts we want behind a median before treating it as settled. Read the figures above as an early measurement of this account, not as a finished profile of it.
Measured over 6 original posts from a 30-day window, last computed on September 27, 2026. Recurring tags: #backnumber, #フジタユウスケ.
Where this sits in the catalog
At 1.77%, かずや@back number sits above the 75th percentile of the 212,805 accounts in this comparison. That places it in the top 25% band, which runs 0.697% to 2.61%.
Show the percentile table
| Percentile | Engagement rate |
|---|---|
| 10th percentile | 0.004% |
| 25th percentile | 0.025% |
| 50th percentile | 0.146% |
| 75th percentile | 0.697% |
| 90th percentile | 2.61% |
| 99th percentile | 83.1% |
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 08:00 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.
Show engagement by hour posted, utc as a table
| Hour (UTC) | Vs author median | Posts |
|---|---|---|
| 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 UTC | 0% | 116K |
| 22:00 UTC | -2% | 100K |
| 23:00 UTC | -1% | 90K |
Show engagement by day of week as a table
| Day | Vs author median | Posts |
|---|---|---|
| Sunday | +5% | 393K |
| Monday | +1% | 483K |
| Tuesday | -2% | 520K |
| Wednesday | -3% | 472K |
| Thursday | -2% | 430K |
| Friday | -3% | 447K |
| Saturday | +2% | 393K |
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.
| Format | This account | Catalog effect | 95% interval | Accounts behind it |
|---|---|---|---|---|
| Image or video | 50% of posts | +111% | +108% to +115% | 34K |
| Outbound link | 0% 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.
- 0% 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 116 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
- Nov 13, 20258.1x their median
back number史上最大規模となる 初の5大スタジアムツアー🏟 “Grateful Yesterdays Tour 2026” 開催決定🎉‼️ 🎫最速one room会員先行受付は 本日12:00より受付スタート! 🗓️schedule 5/2(土)【宮 城】キューアンドエースタジアムみやぎ 5/16(土),17(日)【静 岡】静岡エコパスタジアム 5/23(土),24(日)【大 阪】ヤンマースタジアム長居 6/13(土),14(日)【神奈川】日産スタジアム 6/27(土),28(日)【熊 本】熊本えがお健康スタジアム 🔻特設サイトはこちら https://t.co/VQX0rJYZlJ #backnumber #backnumberスタジアムツアー
- May 2, 20263.2x their median
『Grateful Yesterdays Tour 2026』 ツアー初日! キューアンドエースタジアムみやぎ! 天候には恵まれたので後はやるだけ! みんなで楽しみましょう!! よろしくですー! https://t.co/JJSDLSj20v
- Jun 27, 20263.2x their median
『Grateful Yesterdays Tour 2026』 ツアーファイナル! 熊本えがお健康スタジアム初日! 色々ギリギリ過ぎだけど…今日もしっかり楽しみますし、楽しみましょう! よろしくですー! https://t.co/bwDRV1XvwR
- May 16, 20263.1x their median
『Grateful Yesterdays Tour 2026』 静岡エコパスタジアム 初日! メッセージありがとうございます。 今日も一緒に楽しみましょう! よろしくですー! https://t.co/QyqxdUtYIl
- Jun 13, 20263.1x their median
『Grateful Yesterdays Tour 2026』 日産スタジアム初日! 今日も天気に恵まれライブ日和! 水分補給をしっかりして一緒に楽しみましょう! よろしくですー! https://t.co/I6o73h2Hq9
- May 23, 20263.1x their median
『Grateful Yesterdays Tour 2026』 大阪 ヤンマースタジアム長居 初日! 天気もどうにかもちました! 今日も楽しみましょー! よろしくですー! https://t.co/cs00DHRZQC
- Dec 31, 20252.8x their median
あけましておめでとうございます! 本年もよろしくですー!
- Jun 14, 20262.8x their median
『Grateful Yesterdays Tour 2026』 日産スタジアム2日目! 今日も雨の心配は無さそう! しっかり楽しんでいきましょう! よろしくですー! https://t.co/OVFK8ce7QG
- Jun 28, 20262.7x their median
『Grateful Yesterdays Tour 2026』 ツアーファイナル! 熊本えがお健康スタジアム2日目! いよいよツアー最終日! 今日も楽しんでいきましょう! よろしくですー! https://t.co/zneoQYiTfv
- May 2, 20262.6x their median
『Grateful Yesterdays Tour 2026』 ツアー初日、キューアンドエースタジアムみやぎ! ありがとうございました! 彼の体調もなんとか大丈夫そうで良かったです…笑 次は静岡! よろしくですー!
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
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 4.4K interactions against 246K followers, an engagement rate of 1.77%. Posts are seen about 71K times each, and 6.14% of those impressions turn into an interaction. That is about 28.9% of the follower count, which is the gap between an audience on paper and an audience in a timeline. Posting runs at about 0.27 posts a day over the last 30 days, though only 13% of days saw any activity at all. Most posts go out around 08:00 UTC, and Saturday is the busiest day of the week. Of the 6 posts sampled, 50% carry an image or video. The account's strongest tracked post pulled 35K interactions, about 8.1x its own typical post. Recurring topics include #backnumber, #フジタユウスケ. Only 6 original posts have been captured so far, fewer than the 8 posts we want behind a median before treating it as settled. Read the figures above as an early measurement of this account, not as a finished profile of it.
- What is かずや@back number's engagement rate on X?
- かずや@back number (@kojimakazuya) has an engagement rate of 1.77%, based on the median interactions across 6 original posts from the last 30 days against 245,716 followers. Replies, reposts and quote-posts of other people are excluded from that sample.
- Is that a good engagement rate?
- At 1.77%, かずや@back number sits above the 75th percentile of the 212,805 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 @kojimakazuya have real engagement?
- There is not yet enough sample to rank this account against others of its size.
- When does @kojimakazuya post?
- Most posts go out around 08:00 UTC, and Saturday is its busiest day, at roughly 0.27 posts per day across the measured window.