Kohei Hasebe — Japanese Writer, Editor & Content Creator
I am a Japan-based freelance writer, editor, and content creator with more than 12 years of experience since becoming independent in 2014.
I have written more than 4,000 articles across a wide range of fields, including entertainment, technology, business, SEO, interviews, and technical content.
In addition to writing, I work on website management, YouTube production, content strategy, localization, and AI-assisted workflow development.
My strength is not limited to writing individual articles. I can also help plan, produce, improve, and maintain content over time.
Editorial Writing & Interviews
I have extensive experience producing articles for Japanese online media, including interviews, event coverage, commentary, and feature articles.
Magmix / Media Vague
Since 2022, I have written entertainment articles for Magmix, a Japanese media outlet covering anime, manga, games, movies, and related culture.
Many of these articles are also distributed through Yahoo! News Japan.
My work includes:
- Anime, manga, and film commentary
- Interviews with creators and industry professionals
- Event and exhibition coverage
- Background research and fact-checking
- Articles based on original interviews and field reporting
Selected assignments have included interviews and coverage related to Mobile Police Patlabor, Fist of the North Star, BLEACH, Tokyo Game Show, manga events, and other entertainment topics.
Some articles have reached large audiences, including articles exceeding one million monthly page views.
SEO Content & Editorial Work
Moovoo / Bouncy
From 2019 to 2023, I worked as a writer and editor for Moovoo and Bouncy, digital media operated by The Asahi Shimbun group.
I produced:
- SEO articles
- Product guides and reviews
- How-to content
- Interviews with specialists and businesses
- Consumer technology articles
- Article editing and revision
My work involved keyword intent, article structure, research, internal linking, readability, and editorial quality control.
I have also developed my own SEO rank-tracking tool using AI-assisted coding to monitor keyword rankings and changes over time.
Technical and User-Support Content
Asurion Japan Holdings
From 2024 to 2025, I worked on technical content for KDDI’s smartphone support service.
The main audience included smartphone beginners and older users.
My responsibilities included:
- iPhone and Android how-to content
- Step-by-step instructions
- UI explanations
- Screenshot instructions
- Troubleshooting content
- Writing according to detailed editorial guidelines
A major part of this work was translating technical procedures into language that non-technical users could understand easily.
I have also worked on manuals, chatbot-related content, technical documentation, error reproduction, and other projects under NDA.
Business Interviews
From 2020 to 2023, I conducted interviews for BizHint, a Japanese business media platform.
My interview subjects included business owners and executives, with topics such as:
- Management
- Organizational development
- Corporate turnaround
- Entrepreneurship
- Sales strategy
I have also conducted recruitment interviews and other business-related interviews for corporate clients.
Website & Marketing Support
I support small organizations and businesses with website content, updates, and digital communication.
Freedom Riding Club
Since 2023, I have supported Freedom Riding Club, a Japanese equestrian organization.
My work includes:
- Wix website management
- Website content updates
- Event information
- Articles and reports
- YouTube integration
- Digital marketing support
- Improving paths from content to inquiries and applications
Projects have included content related to Horse Messe, the Soma Nomaoi Festival, riding tours, and other equestrian events.
This ongoing work has contributed to increased registrations and participation in tours and events.
I also provide website support for related equestrian organizations.
YouTube Production
I have operated my own Japanese YouTube channel, Retro, since 2017.
The channel currently has approximately 47,000 subscribers.
I handle the entire production process myself, including:
- Topic selection
- Research
- Scriptwriting
- Recording
- Video editing
- Thumbnail planning
- Channel management
The channel focuses mainly on anime, science fiction, robots, and Japanese pop culture.
I have also been working on bilingual localization of existing videos, including English subtitles, titles, descriptions, and thumbnails.
More than 100 existing videos have been processed as part of this localization project.
Running my own channel gives me practical experience not only in content creation, but also in maintaining a publishing schedule and communicating with a specialized audience over the long term.
AI-Assisted Workflow & Automation
I actively use AI tools to improve content production and business workflows.
My approach is to use AI as a practical production tool while keeping human review and final responsibility for quality.
Examples include:
- SEO rank-tracking tools
- YouTube localization workflows
- Subtitle processing
- Content research and organization
- Website workflow automation
- Translation support
- Repetitive task automation
I also use AI-assisted coding to build small tools for my own work when existing software does not fit the workflow.
AI Data & Audio Projects
I have participated in AI-related data collection and audio projects for international companies.
My work has included:
- Japanese voice recording
- Role-play conversations
- Audio quality control
- Annotation-related tasks
- Following detailed project guidelines
Some projects are confidential and cannot be described publicly in detail.
Background
Before becoming a freelancer, I worked for a Japanese manufacturer in several roles, including:
- Corporate sales
- Human resources
- Accounting-related work
- Management planning support
This background helps me understand both the editorial side and the business side of client projects.
What I Can Help With
I am available for projects such as:
- Japanese SEO articles
- Interviews and editorial articles
- Japanese content editing
- Website content
- Content planning and strategy
- Technical writing
- YouTube scripts and production
- Japanese localization
- Wix and WordPress content support
- AI-assisted content workflows
Both one-time assignments and ongoing projects are welcome.
I am based in Japan and work remotely.
Japanese is my native language, and I can communicate with international clients in written English with the support of language tools when needed.