Yoji Yamada (@raku-science, also known as Science Yoji), a science educator in Japan, makes short hands-on chemistry and physics experiment videos for teachers and students. The channel has about 5,070 subscribers, 1,294 videos and a median of 140 views per video, uploading around 10 videos per quarter. Sponsored integrations would cost roughly $150 to $250 per video.
Japanese science educator with a library of 1,294 classroom-ready experiments
- Median of 140 views per video across the most recent 30 uploads
- About 10 new videos per quarter, steady educational output
- Zero sponsorships to date, so the audience sees the channel as unbiased
Brand fit report
Content
- Formats
- hands-on demonstration, short narrated experiment, lab recap
- Tone
- instructive, playful
- Language
- Japanese
- On camera
- Yes, talking head
- Production
- Phone, natural light
- Typical length
- under 3 minutes
Audience
Commercial
- Brands seen
- None yet
- Categories promoted
- None yet
- Affiliate links
- No
No sponsorship disclosures found in the last 50 videos
Suitability GARM Brand Safety Floor + Suitability
Family friendly
Experiments include fire, hydrogen-oxygen reactions and chemical hazards, but the channel description and videos frame them as educational and warn against imitation at home.
We classify content, never people. No age, gender, ethnicity, religion or political views are inferred about the creator. Audience figures are estimates unless marked verified. Creators can correct anything on their profile.
Platforms
Benchmark score: 14 / 100
Public rule, same for everyone. How it works.
Recent videos
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▶Last three uploads, latest 14 days ago.
◇科学実験をメインにした情報を発信してます。教育関係者や一定スキルと環境下にある人を対象にしていますので、取扱いに注意を要する内容も含まれています。映像を視聴しただけで安易に実施しないで下さい。実験の詳細な情報については、以下のブログも参考になります。仕事依頼などもそちらからお願いします。 ◇ブログ『らくらく理科教室』https://sciyoji.site/ ◇インスタ(yojiyamada_)：https://www.instagram.com/yojiyamada_/?hl=ja ◇管理者：山田暢司(さいえんすヨージ)
About らくらく科学実験
Yoji Yamada, known on YouTube as @raku-science and as Science Yoji, posts short hands-on science experiment videos in Japanese. The channel's videos are mostly under three minutes, filmed in a low-production style, and focus on chemistry and physics demonstrations for teachers and students. The description is also backed by his blog Rakuraku Rika Kyoshitsu on his website.
The channel has about 5,070 subscribers and roughly 1,294 videos, with a median of 140 views per video across recent uploads. The audience is likely Japanese educators, students and science hobbyists, though these demographics are estimates. The channel has no sponsorships so far.
A sponsored video would cost roughly $150 to $250, which works out to a CPM of $20 to $35 per 1,000 views. That compares with $10 to $30 CPM for paid ads. Brands selling classroom science supplies or STEM kits should consider booking.
Written from らくらく科学実験's public YouTube profile, platform data and web mentions. Numbers updated 2026-10-19. らくらく科学実験 can edit or remove this page at any time.
Questions about らくらく科学実験
How much does Yoji Yamada charge for a sponsored video?
A sponsored video from Yoji Yamada would cost roughly $150 to $250 per video, based on his median of 140 views and the standard long-form rate. That is a CPM of $20 to $35 per 1,000 views, compared with $10 to $30 for typical paid ads.
What does Yoji Yamada post about on YouTube?
Yoji Yamada posts short Japanese-language videos of hands-on science experiments for teachers and students, covering chemistry and physics demos such as metal reactions, electromagnetism and home-made devices. Most videos run under three minutes.
How do I contact Yoji Yamada for a brand deal?
Contact details unlock on Starbooked for $0.80. Boosted creators can be booked through Starbooked directly.
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