SEIKIN セイキン

SEIKIN セイキン is a mid-tier-reach creator based in Japan, publishing in Japanese and working mainly in music, with 353.4K combined followers across the platforms we track.

SEIKIN is a Japanese video and music creator who works across YouTube and other social platforms. His profile identifies him as the writer of the YouTube Theme Song and the songwriter and composer for the sibling music unit HIKAKIN & SEIKIN. He also describes an interest in computer-based music production and audio equipment, adding a technical dimension to his musical work. His Instagram directs visitors to a central link for YouTube, TikTok and professional inquiries. Music is the strongest classification for this profile, reflecting both his songwriting responsibilities and his public identity as a recording and video creator. Brands can send a collaboration brief from this profile, and the CreatorFanBase team will reach out and negotiate on their behalf.

Japanese video creator, songwriter and member of HIKAKIN & SEIKIN

On CreatorFanBase this page is a data profile, not a fan page: the numbers below come from Instagram and the other platforms they actually publish on, and we drop anything we cannot confirm rather than estimate it.

Account type

Human

Main focus

Music

Based in

Japan

Language

Japanese

Combined followers

353.4K

Reach band

Mid-tier (100k – 500k followers)

Biggest platform

Instagram — 353.4K

Numbers last checked

Oct 12, 2026

SEIKIN セイキン has 353.4K followers in total, which puts this profile in the mid-tier band (100k – 500k followers). The largest single audience is on Instagram with 353.4K followers — about 100% of the total reach.

Here is where SEIKIN セイキン's audience actually sits, platform by platform, using the latest count we recorded on each one (last checked Oct 12, 2026).

Every handle above links to the official account, so you can open it and check the numbers yourself before you reach out.

SEIKIN セイキン is based in Japan and posts in Japanese. For brands that usually means the core audience follows the same market and language, with a long tail from everywhere else — big accounts rarely stay local.

The content sits in music, so the people watching are self-selected for those interests. That is the useful part of a niche profile: a mid-size account inside the right category often beats a much larger general account, because the audience already cares about the subject.

If you need the same audience profile in another market, the country and language lists on CreatorFanBase let you line up comparable creators side by side instead of guessing.

SEIKIN セイキン publishes mainly on Instagram, in the music space. Instagram-first accounts skew towards visual formats — reels, carousels and stories — which suits product, place and look-and-feel campaigns.

SEIKIN is a Japanese video and music creator who works across YouTube and other social platforms. His profile identifies him as the writer of the YouTube Theme Song and the songwriter and composer for the sibling music unit HIKAKIN & SEIKIN. He also describes an interest in computer-based music production and audio equipment, adding a technical dimension to his musical work. His Instagram directs visitors to a central link for YouTube, TikTok and professional inquiries. Music is the strongest classification for this profile, reflecting both his songwriting responsibilities and his public identity as a recording and video creator. Brands can send a collaboration brief from this profile, and the CreatorFanBase team will reach out and negotiate on their behalf.

We do not rate content quality on this page. What we do keep accurate is size, platform mix and identity, so you can judge fit yourself and go straight to the account.

Public net worth and earnings figures for SEIKIN セイキン are estimates published by third parties, not verified accounts, and they vary widely. CreatorFanBase does not publish a number we cannot source, so treat any figure you see elsewhere as a guess.

If you are shortlisting SEIKIN セイキン for a campaign, these are the facts worth carrying into the brief. Everything here is stored data, refreshed on a schedule rather than typed in once.

A practical sequence: check the lead platform matches where your buyers are, check market and language, open the official account to see recent posting frequency, then ask for a media kit and rate card directly.

Lead platform for a brief

Instagram

Category fit

Music

Budget signal

Mid-tier audience (100k – 500k followers)

SEIKIN セイキン's counts come from the platforms themselves via apify and are refreshed on a schedule; the most recent check was Oct 12, 2026. When a platform blocks a read, we keep the last verified number and show where it came from instead of filling the gap with an estimate.