This guide introduces 50 technology influencers in Japan across eight segments: mass-reach gadget channels, independent testers, PC and desk creators, smartphone reviewers, camera and video creators, audio and smart-home voices, generative-AI educators, and developer-tool and SaaS creators. For gaming hardware and esports, see gaming influencers in Japan.
Mass-Reach Gadget Generalists
Six large YouTube-led gadget channels that give a product launch mainstream visibility with Japanese consumers.
Kazu Channel / カズチャンネル
All creators1.85M YouTube subscribers. Japan’s largest gadget channel, running since 2010 with 3,818 videos and 1.22 billion lifetime views, is built on breaking-news speed: every video published between 9 and 12 September 2026 was Apple-event coverage. His first book was published by KADOKAWA in June 2026. No agency is listed.
Koji Seto / 瀬戸弘司
All creators1.68M YouTube subscribers. A former stage actor, he built the channel on sketch and comedy-format gadget reviews across 2,330 videos and 1.04 billion views, a register a straight spec review cannot reach, and his blunt verdicts on purchases get written up in Japanese media. He is represented by UUUM, which lists him on its official creator page.
Takuya Kajigaya / かじがや卓哉
All creators726K YouTube subscribers. A home appliance and iPhone specialist who cites more than ten years in consumer-electronics retail and the Home Appliance General Adviser qualification, he has a recurring appliance slot on Japanese terrestrial television and covers Apple events in person. He runs his own office, Kajigaya Denkiten.
Kazumasa Watanabe / ワタナベカズマサ
All creators426K YouTube subscribers. He publishes one to three videos a day across gadgets, gaming and camera, 3,169 videos and 256 million views in all, and is a regular name in Japanese crowdfunding launches: Harman’s JBL campaign on GREEN FUNDING and cado’s 190-million-yen Makuake campaign both named him. His Instagram is small next to YouTube.
Satoru Toda / 戸田覚
All creators325K YouTube subscribers. Representative director of Avant-Garde Inc. and the Toda Satoru Office, he publishes several explicitly harsh, scored reviews a day across 3,833 uploads and 159 million views, covering portable monitors, mini PCs, AI smart glasses and business notebooks. He writes an IT column for Nikkei xTECH and states he has written more than 150 books. A smart-lock brand announced his hands-on review in July 2026.
Gadgetomo / ガジェットモ
All creators343.4K TikTok followers and 149K YouTube subscribers. A TikTok-first gadget creator with 15.4 million cumulative TikTok likes and 210 million YouTube views, he has been an official social ambassador for Nreal Japan, now XREAL, and was nominated for Learning Creator of the Year at the TikTok Awards Japan 2025. He also works in English.
Independent Testers — The Tier Money Cannot Reach
Independent testers who buy, compare and take apart products themselves, most of them refusing sponsored reviews.
Takomaru / たこまる
All creators673K YouTube subscribers. He buys PCs, gaming PCs, desk setups and gadgets himself and compares them at volume, such as testing 24 monitor arms before recommending three, funded by Amazon Associates links he discloses openly. He has done a merchandise collaboration with a retail chain, but by his own policy accepts no corporate-sponsored product reviews.
Thomas Gadgemaga / トーマスガジェマガ
All creators511K YouTube subscribers and 90K on X. An independent gadget reviewer running a blog alongside the channel, with 474 videos averaging 290,000 views each. His three-sentence channel description says he is not currently accepting sponsorships, warns that any request to ship products in his name is a scam, and states that the channel earns through affiliate programmes.
Saityo / さいちょう
All creators395K YouTube subscribers. Faceless, synthetic-voice teardowns on a fixed Friday schedule, 228 videos and 84.9 million views, including an investigation series on a calculator that transmits location data and a November 2025 teardown of an Elecom sodium-ion power bank. To preserve review independence he accepts no sponsorships, product supply or tie-ups.
UDN / うどんの機材部屋
All creators78.1K YouTube subscribers. Running since 2007, the channel covers a niche almost nobody in Japan does: local LLMs and image generation on multi-GPU rigs, the deepest Japanese-language testing of that workload for GPUs, power supplies and cooling. He states he has stopped accepting corporate work in the form of a single full-video review; he carries affiliate links and notes that other links may include PR.
ToviWorks / ToviWorks スマホ研究所
All creators35.1K YouTube subscribers. A quantitative smartphone lab: he describes evaluating more than 200 handsets on benchmark, thermal and latency data and cooling modifications, buying most units himself and reselling them afterwards for editorial independence. Raw datasets go early to channel members. His description is bilingual.
PC, Components, Desks & Workspaces
Desk-setup, PC-building and workspace creators, several of whom run their own product brands.
Yuta Hiraoka / 平岡雄太 (DRESS CODE.)
All creators430K YouTube subscribers. Workspace and productivity gadgets from the co-representative director of drip Inc., which makes backpacks, mugs, lighting and stationery, so those categories are closed to competitors. Apple Store Marunouchi hosted him for an official Freeform session, and he judged a full annual idea-contest cycle for PFU’s ScanSnap.
Hidetake Horiguchi / 堀口英剛 (monograph)
All creators302K YouTube subscribers. Co-representative director and CEO of drip Inc. after leaving Yahoo! JAPAN, he covers everyday carry, desk setups, Apple accessories and audio across 1,696 videos and 95.2 million views, alongside the monograph blog, whose traffic he self-reports at 500,000 to 700,000 monthly page views. Amazon Associates disclosure is standard in his description.
Tsuneaki Toba / 鳥羽恒彰 (トバログ)
All creators274K YouTube subscribers. White-and-wood desk environments, what’s-in-my-bag interviews and room tours, in which a product appears inside someone else’s working setup. He is representative director of Toba Kikaku Seisaku Inc. (founded 2015, Ginza, product development in its stated business scope).
Serorinne / せろりんね
All creators239K YouTube subscribers. Among the largest female creators in Japan’s DIY PC space, she covers PC building and components across 283 videos and 52.5 million views, with affiliate disclosure. Uploads are infrequent: her latest was 28 August 2026 and the one before it 31 March 2026. No agency is named in her channel description.
Tsuyoshi Mizoguchi / ツヨシ (techyou)
All creators190K YouTube subscribers and 34.9K Instagram followers. A Sapporo-based creator combining smart home and desk setups, with 367 videos and 116 million views; recent coverage includes ECOVACS, Insta360 and XPPen. He launched his own desk brand, techyou, in June 2023, so desk accessories compete with him directly. He openly asks supporters to buy through his affiliate links.
Takahiro Shimizu / 清水貴裕
All creators107K followers on X and 92.9K YouTube subscribers. An extreme overclocker covering CPU coolers, power supplies, cases and memory, whom MSI’s Japanese entity described as world-class with seven national-team selections when it announced a product-development contract with him in November 2020. He publishes unflattering findings on established European brands and runs a company, shimi-lab.
Arai / アライ
All creators51K YouTube subscribers. Considered long-form reviews, one to two a month. He publishes his terms in his channel description: a production fee from 300,000 yen per long-form video, product samples alone not accepted as compensation, and content left to him, good and bad; a request to mention a selling point is acceptable, one to avoid a topic or skip comparison with competitors is not.
Smartphones, Carriers & the China-Brand Gateway
Smartphone, carrier and Chinese-hardware reviewers, from comparison channels to handheld-console specialists.
Chiehon & Tsubaki / モバイルドットコムTV
All creators176K YouTube subscribers. One of Japan’s largest female-fronted smartphone comparison channels, built on a two-presenter format across 887 videos and 69.6 million views. It is run by Archu Inc. of Ogaki, Gifu, founded October 2021, which also operates two owned media sites, so an article and a video can be booked as one package.
Yoshitendo / 吉天堂
All creators76.4K YouTube subscribers. Near-daily reviews of handheld consoles, controllers and XR glasses from Blackview, Lenovo and ALLDOCUBE across 533 videos and 37.2 million views, alongside debunking of counterfeits. His viewers often arrive by searching a model number, which puts them close to a purchase.
Misaki Misa / 美咲みさ
All creators65.2K YouTube subscribers. A DIY PC-building creator with a bilingual channel description, she appeared at CORSAIR’s iCUE LINK launch and Thermaltake’s 25th-anniversary presentation, both hosted in Japan by the national distributor.
Kaonasi Gadget / カオナシガジェット
All creators45.8K YouTube subscribers. Carrier, MVNO and eSIM reviews. His channel description lists the genres he accepts and a sample of past work for SoftBank, and notes that he works in Japanese only. His sponsored work carries clear PR labelling, and his recent affiliate videos carry an affiliate PR line.
Camera, Photography & Video Production
Photographers, filmmakers and camera reviewers across YouTube, Instagram and TikTok.
Photographer Ryo / 写真家Ryo
All creators687K YouTube subscribers. Japan’s largest camera-category creator, with 1,843 videos and 1.076 billion lifetime views, covers photography as a business (studio selection, lighting, pricing) rather than gear specs. He states he is a full member of the Japan Advertising Photographers’ Association, and his main funnel is his own LINE account and photography courses.
Kunie / くにえ
All creators693.5K Instagram followers, 592.1K on TikTok and 75.2K YouTube subscribers. A Kyoto street photographer whose kimono and street scenes, with titles and hashtags mainly in English, reach an international audience under one handle on all three platforms. Her profile says she shoots a Canon EOS R1 and lists no agency.
KIONA PRODUCE / キオナ
All creators367.3K Instagram followers and 52.5K YouTube subscribers. Instagram-led photo and video production from a creator who names four titles in his channel description: DJI Japan Creator, Sony Xperia Ambassador, YASHICA Ambassador and official creator for the Asakusa tourism association.
JETDAISUKE / ジェットダイスケ
All creators281K YouTube subscribers. Opened in February 2006, the oldest channel in this guide, it now holds 4,157 videos and 276 million views. His channel also lists photography exhibitions year by year, at EIZO Galleria Ginza, the Sony Store in Osaka, Fujifilm Photo Gallery Ginza and with the papermaker Awagami, and his affiliate disclosure is clear.
Keisuke Takasawa / 高澤けーすけ
All creators241K YouTube subscribers. Camera, travel and gadget videos, 1,443 of them with 81.2 million views. He has appeared on Insta360’s CP+ booth stage two years running, with a creator talk in 2025 and a joint session with Antigravity in 2026. He runs three Instagram accounts, so name the campaign account in the brief.
Yu-tobi / ゆ〜とび
All creators188K YouTube subscribers and 87.2K Instagram followers. Camera and lens reviews, including embargoed first looks: his OM SYSTEM PEN video went live on announcement day in September 2026. He delivers both stills and video, useful when a brand needs sample imagery alongside a review, and one recent video credited equipment cooperation from SIGMA.
Yuichi Ishida
All creators87K YouTube subscribers. A filmmaker who describes himself as a Sony Alpha Academy video instructor and a video consultant to a United Nations agency, with genuinely cinematic self-produced documentary work, so the brand film itself can be commissioned from him. He also runs his own online school and community.
Kei Shinohara
All creators48K YouTube subscribers. An action camera and drone specialist who follows product lines through their lifecycle: his recent videos centre on Insta360 and DJI, with others on Antigravity, PGYTECH, Neewer and RANVOO. He is represented by FunMake, which lists him on its official creator page.
Audio, Smart Home & Home Appliances
Earphone, smart-home and home-appliance creators, many drawing on careers in retail or engineering.
Kajikaji / カジェログ
All creators157K YouTube subscribers. Earphone and headphone reviews from a creator who states he managed an earphone specialist store, with nine years in audio retail. Recent coverage includes Sennheiser, Bose, Skullcandy, SOUNDPEATS, HIFIMAN, beyerdynamic and MOONDROP, and he also runs a blog he self-reports at about 400,000 monthly page views.
Raramaro / ららまろ
All creators120K YouTube subscribers. Audio reviews covering Sennheiser, AVIOT, Xiaomi, JBL, Marshall, Anker and EarFun. Sennheiser named him an officially recognised YouTuber in May 2021, and he runs an Amazon storefront. He is represented by FunMake.
Fugumikan / ふぐみかん
All creators44.4K YouTube subscribers. With 2,561 videos, he covers the deepest end of Chinese portable audio, mostly wired earphones and cables, including brands with no Japanese distribution. His links use Amazon Associates, AliExpress, Rakuten and HiFiGo, and he says the income funds more reviews. He takes supplied-product reviews.
MiD / MiD'S LIFE
All creators108K YouTube subscribers. Japan’s leading smart-home and charging-accessory channel: twelve of his fifteen most recent videos featured SwitchBot, MOFT, CIO, MATECH or Anker, in running series. His description lists the categories he cannot currently take (software and apps, services, large appliances, large furniture and office chairs) and notes that YouTube is not his full-time work.
Shachipan / シャチパン
All creators101K YouTube subscribers. Home appliance and TV comparisons from a creator who states he has spent over fifteen years in design and development at a listed manufacturer. He investigates products he thinks others have over-praised, and his description lists three requests he will not accept: say nothing unfavourable, do not touch price, do not mention electricity costs on a high-consumption product.
Kaden no Tora / 家電の虎
All creators125K YouTube subscribers. A working consumer-electronics retail employee by his own account, he covers TVs, refrigerators, washers and air conditioners from the sales floor, in a what-staff-would-rather-not-tell-you register: how products sell, get priced and move.
Yoshikazu Ichikawa / 市川義一
All creators68.4K YouTube subscribers. Appliance reviews from the straight man of a comedy duo, who states he belongs to Yoshimoto Kogyo, a major talent agency. His description separates PR or supplied videos (free product, no fee) from paid promotion, and states that the channel does not dwell on a product’s drawbacks.
Generative AI & Business-Productivity Educators
Generative-AI and productivity educators teaching Japanese business users, most of them running their own training companies.
Youseful / ユースフル
All creators476K YouTube subscribers. A corporate channel led by Kohei Osanai that teaches the Microsoft stack: Excel, Teams, PowerPoint, Copilot and Power Automate. Its commercial model is content licensing rather than sponsorship, with a resale agreement with a corporate training firm and a video supply arrangement with an e-learning company.
Keito Miura / 三浦圭人 (KEITO)
All creators210K YouTube subscribers. Same-day testing of new AI model releases across 542 videos, posted every few days, on a channel branded explicitly around trustworthiness. He offers consulting, advisory and speaking through his company.
Tomohiro Ikeda / 池田朋弘 (いけともch)
All creators210K YouTube subscribers on the main channel. A weekly AI news digest of fifteen or sixteen items per episode, with recent episodes covering OpenAI and Google releases, plus a second channel on AI deployment inside companies and an interview series with generative-AI leaders. He states he founded Pop Insight and advises a listed company.
Kohei Imanishi / 今西航平 (いまにゅ)
All creators188K YouTube subscribers. AI coding for business people: the channel’s premise is that you do not write the code, the AI does, with practical coverage of Claude Code, Cursor and Codex. He states he has published Python and data-science titles with KADOKAWA and teaches on Udemy and at a digital university. He runs his own company.
Takumi Usui / 臼井拓水 (usutaku)
All creators324.9K Instagram followers, 168K YouTube subscribers and 92K on X. Japan’s largest individual Microsoft Copilot educator, he is CEO of a generative-AI training company and runs a paid community. He states he worked at a venture fund and at Amazon Japan before founding his firm in October 2023, and he has written a book on Notion AI.
Takayuki Fukatsu / 深津貴之
All creators232K followers on X, plus 81,000 on note, where he posts once or twice a month; he has no YouTube channel. CXO of note Inc. and part of THE GUILD, he writes conceptual pieces framing what generative AI changes, and the vocabulary he popularised is quoted onward across Japanese AI discourse. Salesforce Japan has interviewed him on its Japanese blog.
Kento Kajitani / 梶谷健人
All creators72K followers on X and 45,000 on note, across 316 pieces. He writes on AI strategy and organisational design for executives and product teams, runs POSTS, and states that he advises more than ten companies, founded an XR company and has written two business books. Paid posts and a paid membership are his revenue base.
Developer Tools & Product-Native SaaS Creators
Creators for engineers and SaaS users, from AI-assisted development and AWS to Notion.
Kiyoto Yamaura / 山浦清透
All creators127K YouTube subscribers. AI-assisted development for working engineers, with his 2026 output centred on Claude Code and agentic workflows. He publishes working sample code on GitHub, states that his Udemy courses have been taken by more than 60,000 people, and runs a programming learning service. He posts one to two videos a month.
Shimabu / しまぶー
All creators121K YouTube subscribers. Engineering-career and technology commentary for people studying programming, interested in IT or job-hunting; his channel states 35% of viewers are aged 18-24 and 38% aged 25-34. His online salon is his main revenue, and he also runs a Voicy audio channel.
Yuji Tsuburaya / 円谷雄二
All creators65.9K YouTube subscribers. Notion implementation consulting is his business: he is an official Notion ambassador, was selected by Notion Labs as a certified consultant in July 2024, is listed individually on Notion’s consulting-partner directory and sells his own product built on Notion. Notion competitors cannot work with him.
Rei / Rei (暮らしとNotion)
All creators54.1K YouTube subscribers. Notion for everyday life across YouTube, X and Instagram under one handle, plus a store selling her own templates and Udemy courses and her own task-management product. She is an official Notion ambassador and states that her book with a Japanese technical publisher has passed 20,000 copies.
Kohei Kurokawa / くろかわこうへい
All creators25.5K YouTube subscribers. AWS education for systems-integrator, SES and internal-IT engineers; his channel reports an audience 94.6% male. He posts rarely and mainly runs an AWS learning service. His description requires a decision-maker at any meeting, and refuses briefs paid only in product.
Junichi Ito / 伊藤淳一 (jnchito)
All creators13K followers on X. A Ruby programmer at SonicGarden Inc., listed on Qiita with 8,229 followers and 408 posts, he wrote the standard Japanese introduction to Ruby and in April 2026 published a book on how to write technical articles.
