As of August 1, 2026, no new social media or news activity has been recorded for Seikin. Seiya Kaihatsu professionally known as Seikin, is a Japanese YouTuber and singer-songwriter. His younger brother is YouTuber Hikakin, who is also a member of the Japanese music group Hikakin & Seikin. StarFeed checks for new updates every few minutes. Use the day-by-day view above to see activity from other dates.
← Full profile
Seikin on August 1, 2026: news, posts & full activity
FAQ
Q.What did Seikin do on August 1, 2026?
As of August 1, 2026, no new social media or news activity has been recorded for Seikin yet. StarFeed checks news outlets, Twitter, Instagram, YouTube and other platforms every few minutes, so new updates may appear soon. Use the day-by-day view above to browse activity from other dates.
Q.Who is Seikin?
Seiya Kaihatsu professionally known as Seikin, is a Japanese YouTuber and singer-songwriter. His younger brother is YouTuber Hikakin, who is also a member of the Japanese music group Hikakin & Seikin.
Q.Where can I see Seikin's recent activity?
The Seikin profile page on StarFeed organizes all activity from the past 14 days by day. The weekly summary pages also let you see a full week's events at a glance.