JapaneseNOGUCHI, Soichi 野口 聡一（公式） is on Twitter (X) as @Astro_Soichi, with 659,366 followers and 6,976 posts. A typical post draws 186 interactions, an engagement rate of 0.028% per follower. It has been on X since October 2009, an account age of 16 years.
Engagement
A typical post picks up 186 interactions against 659K followers, an engagement rate of 0.028%. Measured over 34 original posts, its engagement rate beats 49% of 20,444 tracked accounts of a similar size, which puts it in the middle of its size range rather than at either end. Posts are seen about 34K times each, and 0.552% of those impressions turn into an interaction. That is about 5.10% of the follower count, which is the gap between an audience on paper and an audience in a timeline.
Measured over 34 original posts from a 30-day window, last computed on October 4, 2026. Recurring tags: #iss, #spacex, #さんま御殿.
Full engagement reportFollower growth
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Bio
Astronaut/Professor/Actor/Song Writer. Space Shuttle+Soyuz+SpaceX. Guinness World Records. 東京大学特任教授、立命館大学学長特別補佐、月９ドラマ出演。 講演申込はteam.nogu.＠gmail.com
Notable followers
The biggest accounts in our directory following @Astro_Soichi.
NOGUCHI, Soichi 野口 聡一（公式） on Twitter (X) - frequently asked questions
- What is the Twitter handle for NOGUCHI, Soichi 野口 聡一（公式）?
- NOGUCHI, Soichi 野口 聡一（公式） posts on Twitter (X) as @Astro_Soichi. The profile is at x.com/Astro_Soichi, and the View on X button at the top of this page opens it.
- How many followers does NOGUCHI, Soichi 野口 聡一（公式） have on Twitter?
- NOGUCHI, Soichi 野口 聡一（公式） (@Astro_Soichi) has 659,366 followers on Twitter (X). The count is refreshed continuously from public data.
- When did NOGUCHI, Soichi 野口 聡一（公式） join Twitter?
- NOGUCHI, Soichi 野口 聡一（公式） joined Twitter (X) in October 2009. The @Astro_Soichi account is 16 years old. Searches for NOGUCHI, Soichi 野口 聡一（公式） age often mean a personal age, which we do not publish. The figure here is the account age only.