A deep, calm, and authoritative Japanese narration sample. Perfectly suited for documentaries, corporate videos, and educational content. video explainervideo narration
- Voiceover Artist
Koichi Tomikawa
- Fukuoka, Japan
- 4 projects
I am a professional Japanese voice-over artist and content evaluator specializing in AI training and TTS (Text-to-Speech) research.
About
I am a professional Japanese voice-over artist and content evaluator specializing in AI training and TTS (Text-to-Speech) research. I have extensive experience recording thousands of phrases for AI datasets and performing multi-role conversational scripts with high precision.
Technical Environment: I operate from a dedicated home studio equipped with an Audio-Technica AT2020 microphone and a Focusrite Scarlett Solo Gen4 audio interface. I can deliver high-quality, unprocessed RAW audio (24-bit/48kHz) that meets strict technical specifications.
Specialized Skills: Beyond standard narration, I possess a unique vocal range including specialized techniques such as death metal vocals (growls), providing a diverse spectrum of voice data for advanced AI synthesis. I am also skilled in AI content evaluation (RLHF, LQA/MQM) and SEO strategies.
- Joined December 2025
Industry experience
- Media & Entertainment
- Non-Profit Organization
More experts in Fukuoka, Japan
Projects · 4
Dynamic and expressive voice acting for gaming, animation, and creative AI storytelling. gaming animation acting
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High-energy, persuasive, and engaging tone designed for advertisements and promotional videos. advert commercial promo
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Consistent pacing and atmospheric delivery for long-form narration, audiobooks, and e-learning. audiobook storytelling elearning
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Work experience
Freelance Language EvaluatorJan 2024 – Present · 2 yrs 11 mos
Evaluate Japanese-language content and AI-generated responses for relevance, accuracy, and clarity. Review documents and provide structured feedback to improve LLM outputs. Collaborate with international teams through written English communication.
Freelance Voice-over Artist & Content CreatorJun 2022 – Present · 4 yrs 6 mos
Provided Japanese voice-over services for international clients, including thousands of recorded phrases for AI training datasets with high precision and adherence to technical specs; recorded conversational scripts for TTS research (24-bit / 48kHz RAW audio delivery) and corporate narrations; performed audio QC and prepared read notes for Japanese TTS (naturalness / lip-sync).
Social Worker · Social Welfare CorporationMar 2008 – Jun 2022 · 14 yrs 4 mos
Managed facility operations, admissions, and resident counseling for 14 years.
Education
B.A. in Economics · Kurume University2001 – 2005
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