Starbooked

Seizyuro (誠十郎), handle @sayzyuro, is a Japanese creator from Japan who makes slow, narrated Yukkuri gameplay videos mainly of Elden Ring. The channel has about 47,300 subscribers and a median of roughly 5,000 views per video. He uploads about once a month, and sponsored integrations would cost $150 to $250 per video.

Why brands book 誠十郎

Loyal Japanese Elden Ring audience with steady long-form watch time

  • Median of about 4,955 views per video across the last 30 uploads
  • Roughly 47,300 subscribers and 2.97 percent engagement
  • Long episodes averaging about 25 minutes give sponsors time to integrate
Best forgaming peripheralsgame-related subscription or toolsgaming snacks and drinks
Watch forOnly about 3 uploads in 90 days, so sponsor timelines must be flexible.

Brand fit report

Content

Topics, IAB taxonomy
Video Game70%
Role-Playing Video Game20%
Action Game10%
Formats
narrated gameplay series, live stream vods, numbered episode series
Tone
relaxed, playful
Language
Japanese
On camera
No, voiceover and b-roll
Production
Phone, natural light
Typical length
15 to 25 minutes

Audience

Commercial intent10/100
Comments asking for links, prices or where to buy
Sentiment85/100
Positive share of 30 comments
Engagement3.0%
Likes and comments per view on recent videos
Audience asks abouthow to beat a specific boss or areawhich build or class to pickwhat happens next in the episode series
Age
15%18-24
35%25-34
30%35-44
20%45+
Gender
25%women
75%men
Countries
🇯🇵 Japan92%
🇺🇸 United States3%
LanguagesJapanese 95%English 5%

Commercial

0%of the last 50 videos were sponsored
None seenno sponsored videos in the last 50
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

Profanitylow
Adultlow
Drugslow
Violencemedium
Politicslow

Family friendly
Fantasy combat violence in Elden Ring gameplay, with no profanity or sensitive topics flagged in titles or descriptions.

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

PlatformFollowersMedian viewsUploads, 90d
YouTube47k5k3
X–––

Benchmark score: 26 / 100

Public rule, same for everyone. How it works.

Engagement Median views relative to followers13 / 50
Activity Uploads in the last 90 days3 / 30
Reach Followers on the main platform9 / 20

Recent videos

Last three uploads, latest 33 days ago.

どうも、RAVENZ NETWORKの誠十郎と申します。 団体名を使っていますが、所属は一人だけです。 のんびりマイペースに、ゆっくり実況動画を上げたり、極希にライブ配信をしています。 中身はその辺に生息しているオッサンです🌞 ⚡関連サイト BLOG:http://ravenz.blog.jp/ Discord:https://discord.gg/X6g5G4qyPp チャンネルメンバーシップ:https://bit.ly/3dIGTGo ⚡連絡先等 Twitter:https://twitter.com/ravenz ※日常を呟いています(鍵付ですが申請して頂ければ承認します) Twitter:https://twitter.com/sayzyuro ※動画投稿のお知らせ、ゲームに関する事を呟いています
誠十郎's own profile description on YouTube

Are you 誠十郎? Claim or remove this profile.

About 誠十郎

Seizyuro (誠十郎, @sayzyuro) is a Japanese YouTuber who posts narrated Yukkuri gameplay videos, mainly of Elden Ring. The channel's long-running "Knight's Solo Journey" episode series and its occasional live streams give viewers a steady stream of long, character-driven gameplay content. The creator's own website, ravenz.blog.jp, is listed as a site for production notes; the site does not state a profession or brand work.

The audience is mostly Japanese, with an estimated skew toward adult male viewers aged 25 to 44. These figures are estimates based on the content and language, not platform-reported data. Median views are around 5,000 per video against about 47,300 subscribers.

A sponsored integration would cost about $150 to $250 per video. At a CPM of $20 to $35 per 1,000 views, that is more expensive than typical paid-ad CPM of $10, so the channel suits brands that value an engaged niche over raw reach.

Written from 誠十郎's public YouTube profile, platform data and web mentions. Numbers updated 2026-10-19. 誠十郎 can edit or remove this page at any time.

Questions about 誠十郎

How much does 誠十郎 charge for a sponsored video?

Based on a median of about 4,955 views per video, a sponsored integration is estimated at $150 to $250 per video, which works out to a CPM of $20 to $35 per 1,000 views. Rates are estimates and not a published price list.

What does 誠十郎 post about on YouTube?

The channel posts narrated Yukkuri gameplay videos, mostly of Elden Ring, in numbered episode series. It also does occasional live streams. Most videos run 15 to 25 minutes and are in Japanese.

How do I contact 誠十郎 for a brand deal?

Contact details unlock on Starbooked for $0.80. Boosted creators can be booked through Starbooked directly.

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