Japanese伊東健人 is on Twitter (X) as @21s_ken, with 365,606 followers and 30,800 posts. A typical post draws 5.4K interactions, an engagement rate of 1.49% per follower. It has been on X since September 2009, an account age of 17 years.
Engagement
A typical post picks up 5.4K interactions against 366K followers, an engagement rate of 1.49%. Measured over 14 original posts, its engagement rate beats 98% of 20,182 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 109K times each, and 4.99% of those impressions turn into an interaction. That is about 29.8% of the follower count, which is the gap between an audience on paper and an audience in a timeline.
Measured over 14 original posts from a 30-day window, last computed on October 4, 2026. Recurring tags: #伊東健人, #ヒプマイ12thライブ, #週刊秋ラジ.
Full engagement reportFollower growth
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Bio
伊東健人 (Kent Ito) 声優 / アーティスト / 作詞作曲 81プロデュース所属。音楽ソロプロジェクト(@kent_musicstaff)も活動中。こちらもチェック→→https://t.co/mqcbDgwKQ2
Notable followers
The biggest accounts in our directory following @21s_ken.
伊東健人 on Twitter (X) - frequently asked questions
- What is the Twitter handle for 伊東健人?
- 伊東健人 posts on Twitter (X) as @21s_ken. The profile is at x.com/21s_ken, and the View on X button at the top of this page opens it.
- How many followers does 伊東健人 have on Twitter?
- 伊東健人 (@21s_ken) has 365,606 followers on Twitter (X). The count is refreshed continuously from public data.
- When did 伊東健人 join Twitter?
- 伊東健人 joined Twitter (X) in September 2009. The @21s_ken account is 17 years old. Searches for 伊東健人 age often mean a personal age, which we do not publish. The figure here is the account age only.