Japan
Sen, Momo, Ai & Syy's Channel is a Japan-based family YouTube channel whose handle, @oyabakatousan — literally "doting father" in Japanese — captures its entire premise.
Total Followers +0.0%
11.2M
Across YouTube, Instagram
Primary Platform
YouTube
11.2M followers · 100% of audience
Engagement
—
vs. 1.5% category median
Sponsorship Tier
Mega
Est. $23–$63 / IG post
| Window | YouTube | Combined | ||
|---|---|---|---|---|
| Last 7 days | +0 +0.0% | +2 +0.2% | +0 +0.0% | +2 |
| Last 30 days | +0 +0.0% | +1 +0.1% | +0 +0.0% | +1 |
| Last 90 days | +0 +0.0% | -3 -0.3% | +0 +0.0% | -3 |
| Last 365 days | +0 +0.0% | -3 -0.3% | +0 +0.0% | -3 |
Daily follower snapshots from CreatorDB's longitudinal index.
Sen, Momo, Ai & Syy's Channel is a Japan-based family YouTube channel whose handle, @oyabakatousan — literally "doting father" in Japanese — captures its entire premise. Managed by the father of four siblings, Sennosuke (Sen), Momoko (Momo), Aiko (Ai), and Shiro (Syy), the channel spans family vlogs, theme park outings to destinations like Universal Studios Japan and Huis Ten Bosch in Nagasaki, character-themed baking projects, and casual gaming. By mid-2026, the siblings range from elementary school age to young adulthood, giving the channel a naturally evolving dynamic that keeps long-term viewers invested across years.
The audience is almost entirely domestic, with Japan accounting for the overwhelming share of viewership, and skews female across the 18–44 bracket typical of family lifestyle content. The channel's themed baking videos — Godzilla cookies, marshmallow seal treats, holiday cakes — extend its appeal beyond pure family vlogging into a crafts-and-food dimension that broadens its brand-fit considerably. With a multi-million subscriber base and a consistent upload cadence, the channel is well-positioned for partnerships with Japanese family, food, entertainment, and theme park brands seeking warmly domestic, highly trusted reach within the country's parent-oriented content space.
Sen, Momo, Ai & Syy's Channel reaches an audience concentrated in Japan primarily through YouTube, and is best activated via long-form YouTube integrations, Instagram Reels and Stories. As a family creator they map naturally to brands targeting that space. Engagement on YouTube runs around —, pointing to an audience suited to category-relevant, mid-funnel brand campaigns rather than pure-reach buys.
Benchmark estimates for a creator at Sen, Momo, Ai & Syy's Channel's tier (Mega, 11.2M combined followers, Japan). Pulled from CreatorDB's category benchmarks.
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Oyabaka (親バカ) is a Japanese expression for a parent who is excessively — and adorably — devoted to their children, and tousan means father, so the handle translates roughly to 'doting dad.' The Instagram bio even says the channel exists to post oyabaka videos on YouTube, which sets the whole tone of the channel as a dad showing off his kids.
The four siblings' full given names are Sennosuke (Sen), Momoko (Momo), Aiko (Ai), and Shiro (Syy). The channel uses their short nicknames in the title and thumbnail branding, but the YouTube bio lists each child's complete name alongside their birthday.
The channel is managed entirely by the kids' father, as stated directly in the YouTube bio. He is the person behind the camera, the editing, and the uploads — the 'oyabakatousan' of the handle — while the four children are the on-screen stars.
The family regularly visits major Japanese theme parks including Universal Studios Japan, Huis Ten Bosch in Nagasaki Prefecture, and Nijigen no Mori on Awaji Island, which features the Godzilla Intercept Operation attraction. These theme park trips are a core pillar of the channel alongside home cooking and travel vlogs.
Yes — one of their baking videos features the kids making Chibi Godzilla Cookies, which connects directly to their visits to the Godzilla-themed attraction at Nijigen no Mori. The channel has a recurring pattern of pairing theme park outings with a related at-home cooking or baking project for the kids.
Yes, Huis Ten Bosch in Nagasaki Prefecture is one of the theme parks the family has featured in their content, tagged with both #ハウステンボス and #長崎 on their posts. The Dutch-style resort is a recurring travel destination for the family alongside Universal Studios Japan.
Syy's full name is Shiro, and he was born on May 22, 2017, making him around 9 years old as of mid-2026. He is the youngest of the four siblings on the channel, with the oldest, Sen, being roughly 20.
Sen, whose full name is Sennosuke, was born on May 19, 2006, making him around 20 years old as of mid-2026. He is the eldest of the four siblings, meaning the channel now spans a notably wide age range — from a toddler-era Shiro all the way up to a young adult eldest brother.
The channel features kid-friendly baking projects like Christmas tree cakes, chocolate cookies, marshmallow seals shaped like animals, and character-themed treats like Chibi Godzilla Cookies. These hands-on food videos are a consistent format alongside their theme park vlogs and family travel content, and they reflect YouTube topics tagged around baking and cooking for children.
The channel has surpassed 11 million subscribers on YouTube, placing it firmly in the Mega creator tier. For a Japanese-language family vlog channel, that reach is exceptional, and the audience is almost entirely based in Japan.
Stats (followers, engagement, audience demographics, growth) are pulled live from the CreatorDB API covering YouTube, Instagram and TikTok. Bio and FAQ content is AI-assisted; news items are sourced from cited public press at generation time. Read the full methodology →
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