Kei K.
Japanese AI Data Annotator | Model Evaluation & Quality Assurance
Native Japanese AI data annotator and model evaluator with fluent English, specializing in Japanese-language AI training data, multimodal evaluation, and quality assurance. I currently work on ongoing AI annotation and quality evaluation projects, covering image generation and image editing evaluation, audio transcription, proofreading, and Japanese text quality assessment. I am certified across multiple production workflows and regularly evaluate AI outputs using detailed quality rubrics. What I bring beyond task execution: • Native Japanese judgment I work from English-language guidelines and evaluate Japanese content at a native level, including culturally specific material where literal translation alone is not sufficient. • AI output evaluation experience I assess instruction adherence, visual and structural quality, linguistic accuracy, cultural relevance, and overall output quality across text and multimodal AI tasks. • Strong guideline discipline I work accurately from long, frequently updated specifications and identify ambiguity, edge cases, and overlapping criteria rather than making unsupported assumptions. • Japanese food and hospitality expertise Before moving into AI data work, I spent 20 years in the Japanese restaurant industry, including business and team management. This gives me practical subject-matter expertise when evaluating Japanese food, cooking, hospitality, and cultural content. I am currently completing the Google Data Analytics Professional Certificate and have also completed the Futures Thinking Specialization from the Institute for the Future / Coursera. Available 30+ hours per week for AI annotation, model evaluation, Japanese localization QA, data labeling, and related projects. Clear English communication and reliable turnaround.
Earnings and projects
Last 6 months ÷ 6
Last 6 months: $4k
Billed in all: $4,260$4.3k
$2k in the last 6 months
Across 4 contracts
Across 7 contracts
Earnings, last 30 days
Skill rankings: Top 11% in Proofreading
Ranked by MRR among everyone on Upwork with the skill.
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- #64Data Quality Assessment258 freelancers · 🇯🇵 #1Top 25%🇯🇵#1 of 1
- #72English to Japanese Translation529 freelancers · 🇯🇵 #35Top 14%🇯🇵#35 of 301
- #104Japanese898 freelancers · 🇯🇵 #52Top 12%🇯🇵#52 of 485
- #127Image Annotation592 freelancers · 🇯🇵 #1Top 21%🇯🇵#1 of 1
- #132AI Text-to-Image739 freelancers · 🇯🇵 #1Top 18%🇯🇵#1 of 2
- #229AI Model Training1,135 freelancers · 🇯🇵 #2Top 20%🇯🇵#2 of 7
- #231Data Labeling1,093 freelancers · 🇯🇵 #1Top 21%🇯🇵#1 of 6