山口和也

@kkkzzzyyy324 · JP · JA

guitar gear reviews electric guitars guitar pedals

Kazuya Yamaguchi (@kkkzzzyyy324) is a Japanese guitarist from Japan who reviews guitars, amps and pedals. His channel has about 86,400 subscribers and 16,400 median views per video, with roughly 50 uploads in the last 90 days. Sponsored integrations cost $20 to $35 per 1,000 median views, about $330 to $580 per video. Distinctive detail: his gear reviews are presented as blind-style ギタチェク comparisons.

Why brands book 山口和也

Japanese guitar reviewer with 16,000 median views and weekly gear comparisons

Median of 16,421 views per video across 1,511 uploads
About 50 uploads in 90 days keeps gear content frequent
Recent Telecaster and Les Paul comparison videos drew up to 236,513 views

Best forguitar and amplifier brandspedal and accessory launchesJapanese music retail

Watch forChannel views are mostly Japanese-speaking, and sponsorship has not been disclosed in the last 50 videos so far.

Brand fit report

Content

Topics, IAB taxonomy

Music70%

Gadgets20%

Shopping10%

Formats: gear comparison reviews, live playing demos, guitar shop walkthroughs
Tone: enthusiastic, knowledgeable
Language: Japanese
On camera: Yes, talking head
Production: Clean, lightly edited
Typical length: 3 to 15 minutes

Audience

Commercial intent55/100

Comments asking for links, prices or where to buy

Sentiment85/100

Estimated from titles, descriptions and engagement

Engagement0.5%

Likes and comments per view on recent videos

Audience asks aboutwhich guitar or amp sounds best for the moneyhow a specific model compares to a rivalwhere to buy a particular guitar or pedal

Age

15%18-24

30%25-34

30%35-44

25%45+

Gender

15%women

85%men

Countries

🇯🇵 Japan95%

🇺🇸 United States2%

Other3%

LanguagesJapanese 100%

Commercial

0%of the last 50 videos were sponsored

None seenno sponsored videos in the last 50

Brands seen: None yet
Categories promoted: guitars, guitar amplifiers, guitar effects pedals
Affiliate links: Yes

No sponsorship disclosures found in the last 50 videos, though the channel description states that gear reviews may include product placement and paid promotion.

Suitability GARM Brand Safety Floor + Suitability

Profanitylow

Adultlow

Drugslow

Violencelow

Politicslow

Family friendly
Guitar gear reviews and performance videos with no sensitive content flagged in the recent titles.

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

Platform	Followers	Median views	Uploads, 90d
YouTube	86k	16k	50

Benchmark score: 71 / 100

Public rule, same for everyone. How it works.

Engagement Median views relative to followers24 / 50

Activity Uploads in the last 90 days30 / 30

Reach Followers on the main platform17 / 20

Recent videos

▶【ギタリストの一生を体験！】話題のゲーム『80億分の1』のギタリスト版！ビンテージギターを爆買い！？有名ロックバンドに加 · 1.6k views

Last three uploads, latest today.

ギタリスト山口和也のチャンネルです。ギター演奏、様々な機材についての試奏動画を公開しています！ ※当チャンネル機材レビュー動画にはプロダクトプレースメント、スポンサーシップ、おすすめ情報などの有料プロモーションが含まれています。お仕事のご依頼、ギターセミナー、個人レッスン等各種お問い合わせはinfo@k-guitar.main.jpまで。

山口和也's own profile description on YouTube

Are you 山口和也? Claim or remove this profile.

About 山口和也

Kazuya Yamaguchi runs a Japanese-language YouTube channel focused on guitar gear, covering electric and acoustic guitars, amplifiers and pedals. Videos are mostly comparison reviews and live playing demos, often filmed in guitar shops and used-gear stores. The channel has about 86,400 subscribers and about 70 million total views.

Viewers are estimated to be mainly Japanese adult guitar players, with a male-leaning split and a strong interest in buying decisions. Recent uploads show a range of view counts, with median views near 16,400 and occasional breakouts above 200,000.

Brands in guitars, amplifiers and effects should consider the channel. Sponsored integrations are estimated at $20 to $35 per 1,000 median views, or about $330 to $580 per video, a CPM comparable to the $10 to $30 typical for paid ads.

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

Questions about 山口和也

How much does Kazuya Yamaguchi charge for a sponsored video?

Kazuya Yamaguchi's sponsored integrations are estimated at $20 to $35 per 1,000 median views, which works out to roughly $330 to $580 per video based on a median of about 16,400 views. Final pricing depends on the format, usage rights and the deliverables agreed with the brand.

What does Kazuya Yamaguchi post about on YouTube?

Kazuya Yamaguchi posts Japanese-language guitar gear content, including electric and acoustic guitar comparisons, amplifier reviews, pedal demos and live playing. His titles often frame videos as side-by-side tests, such as vintage versus current models or budget versus high-end instruments.

How do I contact Kazuya Yamaguchi for a brand deal?

Contact details unlock on Starbooked for $0.80. Boosted creators can be booked through Starbooked directly, so you can send a brief and agree on terms in one place.

Similar creators

YouTube and other creators in guitar gear reviews, ranked by score.

Creator	Niches	Followers	Median views	Rate	Score
三木楽器 / MIKIGAKKI 公式チャンネル@mikigakki_official · JP	electric guitars guitar gear reviews	9.4k	4.4k	$150–250	82
西尾知矢@西尾知矢 · JP	electric guitar guitar gear reviews	99k	18k	$370–640	73
Alexousky@alexousky · FR	guitar guitar gear reviews	2k	891	$150–250	53
Peavey Japan Official / 逸品館MI事業部@peaveyjapanofficialmi4072 · JP	guitar amplifiers bass amplifiers	1.6k	1k	$150–250	51
Klangdraht - moderner Gitarrenunterricht@klangdraht-gitarrenunterricht · DE	guitar lessons guitar gear reviews	3.8k	2k	$150–250	51
SHINOS AMPLIFIER COMPANY@shinosamplifiercompany · JP	guitar amplifiers guitar gear reviews	22k	7.5k	$150–260	47