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Kei K.

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.

🇯🇵Tokyo, Japan$20/hr100% JSSSince May 2023

Earnings and projects

MRR
$664

Last 6 months ÷ 6

World#65,960 / 412k
🇯🇵Country#141 / 1,269
Revenue, last 30 days
$214

Last 6 months: $4k

World#80,741 / 412k
🇯🇵Country#209 / 1,269
Total earnings
$4.3k

Billed in all: $4.3k

World#268,499 / 412k
🇯🇵Country#680 / 1,269
Per project
$851

$2k in the last 6 months

World#136,594 / 412k
🇯🇵Country#298 / 1,269
Projects, last 6 months
2

Across 4 contracts

100% fixed0% hourly
World#88,918 / 412k
🇯🇵Country#274 / 1,269
Projects in all
5

Across 7 contracts

100% fixed0% hourly
World#266,042 / 412k
🇯🇵Country#775 / 1,269

Earnings, last 30 days

$4.3k+$214 earned in the last 30 daysBilled in all, before Upwork's fee · drag across the chart to see what was earned in any stretch
$4.0k$4.2k$4.4kOct 8Oct 23Nov 7

Skill rankings: Top 11% in Proofreading

Ranked by MRR among everyone on Upwork with the skill.

  1. #15AI-Generated Transcription89 freelancers · 🇯🇵 #1Top 17%
  2. #64Data Quality Assessment258 freelancers · 🇯🇵 #1Top 25%
  3. #72English to Japanese Translation529 freelancers · 🇯🇵 #35Top 14%
  4. #104Japanese898 freelancers · 🇯🇵 #52Top 12%
  5. #127Image Annotation592 freelancers · 🇯🇵 #1Top 21%
  6. #132AI Text-to-Image739 freelancers · 🇯🇵 #1Top 18%
  7. #229AI Model Training1,135 freelancers · 🇯🇵 #2Top 20%
  8. #231Data Labeling1,093 freelancers · 🇯🇵 #1Top 21%