瀬戸弘司 / Koji Seto YouTube Channel Earnings Report & Research

To answer how much does 瀬戸弘司 / Koji Seto make, Branzly runs the channel's estimated 2.3M monthly views through the same ad revenue calculator used across the site: a Lifestyle / Vlogs RPM of $1.4-$4.1 from 2026 niche benchmarks, with the headline figure taken at the middle of that range ($2.8), the same RPM used in the home page calculator. That puts 瀬戸弘司 / Koji Seto YouTube ad revenue at roughly $3,193 to $9,352 per month, or $38,320 to $112.2K per year from AdSense alone.

RPM is what the channel actually keeps per 1,000 views after YouTube's 45% revenue share, unfilled ad inventory and ad blockers, which is why these 瀬戸弘司 / Koji Seto earnings figures sit far below the advertiser-side CPM quotes you may see elsewhere. Views from Tier 1 countries such as the United States, United Kingdom, Canada and Australia pay the most, while Shorts views pay a fraction of long-form RPM.

On top of ad revenue, we assume one integrated-mention sponsorship per month priced on 451.0K average views per video at a Lifestyle cost-per-view rate of $0.01 with a 1× niche multiplier — the identical model in our sponsorship calculator. That suggests a 瀬戸弘司 / Koji Seto sponsored video is worth about $4,925 to $9,850, with a fair midpoint near $7,036.

Sponsorship pricing follows views and engagement, not subscriber count, so a large channel with a quiet video is still only paid for the views that video earns. Brands asking "how much does it cost to sponsor 瀬戸弘司 / Koji Seto?" should expect dedicated videos to cost two to three times an integrated mention.

Channel-level deals work differently again. A retainer is an ongoing fee for a set of deliverables each month, not the sum of every slot the channel could sell, so pricing follows published size bands. With 1.7M subscribers, 瀬戸弘司 / Koji Seto sits in the Macro (1M-5M subs) band, where retainers typically run $18,000 to $40,000 a month. Niche demand, engagement, cadence across 5 uploads a month and how much of the audience watches each upload decide where in that band a deal lands. Spread back across uploads, that adds about $6,011 of value to each video.

Put simply, 瀬戸弘司 / Koji Seto YouTube earnings are estimated at roughly $29,156 to $59,202 per month when ad revenue, one sponsored integrated mention and a retainer are combined, or about $349.9K to $710.4K per year. Channels that publish more sponsored videos, sell merchandise or courses, run memberships, or earn affiliate commissions typically make more than this range.

Net worth estimates for YouTubers like 瀬戸弘司 / Koji Seto usually start from several years of this yearly income, minus taxes, team costs and production spend. Treat any 瀬戸弘司 / Koji Seto net worth figure as a planning range, not a disclosed number.

瀬戸弘司 / Koji Seto (@kojiseto) is a lifestyle YouTube channel that has published 2,334 videos and accumulated 1,052,644,053 lifetime views from an audience of 1,680,000 subscribers. The channel was created in April 2010, which makes it roughly 16 years and 7 months old, and it continues to publish content for viewers interested in lifestyle topics. In the creator's own words: "瀬戸弘司です。 UUUM所属です。 カメラやマイクなど撮影機材、楽器、DTM機材、おもちゃ、食べ物など気になったモノを紹介しつつ、身の回りに起こったことについて語ったり、たまに対談したりもします。 一貫性がないチャンネルなので、好きな動画を探して好きに観て下さい。 このチャンネルがメインチャンネルです。 他にもゲームチャンネル、ミニチャンネルがあります。 よろしくお願いいたします。" Branzly analyses 瀬戸弘司 / Koji Seto using public YouTube data so creators, brands and media buyers can understand the channel's size, output and likely earning power before they reach out, benchmark against it, or plan a collaboration.

瀬戸弘司 / Koji Seto has been on YouTube for approximately 16 years and 7 months, starting in April 2010. Across that period the channel has averaged around 146 uploads per year, which gives a useful signal about publishing consistency: channels that maintain a steady cadence typically build stronger session watch time and more predictable sponsorship inventory than channels that upload in bursts. Longevity also matters for advertisers, because an established back catalogue keeps generating views long after each video's launch week. With 2,334 videos in the library, 瀬戸弘司 / Koji Seto earns a meaningful share of its monthly views from older content rather than from new uploads alone, and that evergreen tail is one reason estimated revenue for lifestyle channels can stay stable between releases.

瀬戸弘司 / Koji Seto currently has 1,680,000 subscribers, a figure that places the channel in the million-subscriber tier of YouTube creators. Total channel views stand at 1,052,644,053, and average views per video sit at approximately 451,004. The ratio of lifetime views to subscribers is about 626.6 views for every subscriber, which indicates a strong reach beyond the subscribed audience, typically driven by search, suggested video placements or Shorts distribution. Branzly estimates recent activity at roughly 2,280,954 views per month based on the channel's most recent uploads and publishing history, which is the number our ad revenue calculator uses to model earnings.

The most-watched long-form video currently visible for 瀬戸弘司 / Koji Seto is "【Appleイベント感想】「iPhone Duo」絶対買う！けど、ちょっと引っかかるんだよなあああああああああ！！！！！！" with 1,138,813 views. On the Shorts side, "よっしゃ、WWDC 2026 でも見ようぜ！" leads with 10,286 views. Top-performing titles are worth studying because they reveal which hooks, formats and topics the algorithm rewards for this audience. For brands, they also show the realistic ceiling of a sponsored placement: a dedicated integration on a channel of this size will usually land somewhere between the average video performance of 451,004 views and the outliers shown above.

Based on an estimated 2,280,954 monthly views and typical lifestyle CPM ranges, 瀬戸弘司 / Koji Seto could earn roughly $3,193 to $9,351 per month from YouTube ad revenue, or approximately $38,320 to $112.2K per year. These figures reflect the AdSense share only. Most channels of this size also earn from brand sponsorships, affiliate links, memberships, merchandise and product sales, so total creator income is commonly several times the advertising estimate. Sponsorship value is usually priced per view rather than per thousand impressions, and lifestyle audiences typically command mid-range rates because of advertiser demand in that vertical.

Branzly classifies 瀬戸弘司 / Koji Seto under the Lifestyle category using the channel's description, keywords, topic signals and the language of its best-performing uploads. Category matters more than raw subscriber count when estimating revenue: a lifestyle channel attracts a specific set of advertisers, and CPMs vary widely between verticals such as finance, software, education, gaming and entertainment. The channel lists JP as its primary country, which further shapes its CPM because advertiser spend differs sharply between geographies. Public channel keywords include iPad, iPhone, Canon, 瀬戸弘司, カメラ, Apple, KORG, Ukulele, which supports this classification. Use the Branzly ad revenue, sponsorship and financial freedom calculators to model how a channel like 瀬戸弘司 / Koji Seto converts views into monthly income, sponsorship pricing and long-term wealth.

Every figure on this page comes from the public YouTube Data API, refreshed each time 瀬戸弘司 / Koji Seto is searched on Branzly. Subscriber counts, view counts and video counts are reported directly by YouTube. Monthly views are an estimate: YouTube does not publish per-month analytics for channels you do not own, so Branzly reconstructs recent performance from the views of the channel's latest uploads, falling back to lifetime views divided by channel age when recent data is sparse. Revenue ranges are modelled estimates, not disclosed earnings, and actual payouts depend on monetisation status, watch time, ad formats, seasonality, audience geography and YouTube's revenue share. Nothing on this page is financial advice, and Branzly is not affiliated with or endorsed by 瀬戸弘司 / Koji Seto or YouTube.

Lifestyle channels like 瀬戸弘司 / Koji Seto sit in the Lifestyle / Vlogs RPM bracket. Advertisers pay more for audiences that buy — finance, business and tech pay the highest rates, while entertainment, gaming and music rely on huge view volume. Seasonality matters too: Q4 ad rates commonly run 30–50% higher than January.

Every figure on this 瀬戸弘司 / Koji Seto channel earnings report comes from public YouTube Data API statistics — subscribers, lifetime views, video count and recent upload performance — refreshed when the report is opened. Estimates are modelled, not disclosed income, and not financial advice. Want to test your own assumptions? Open the YouTube money calculator or browse brands that already sponsor similar creators in the sponsors directory.