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Yuka U.
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Yuka U.

Japanese QA Tester | Localization QA | Mobile App Testing

I take pride in thorough, detail-oriented work and never cut corners. My goal is to help clients deliver reliable, polished products by finding issues before their users do. Native Japanese QA Tester specializing in localization, manual testing, mobile app testing, UX feedback, and AI evaluation. I help companies deliver natural Japanese experiences by identifying localization issues, UI/UX problems, functional bugs, and inconsistencies before they reach users. My experience includes localization QA, app testing, website testing, game testing, translation review, AI evaluation, and usability testing. I focus on providing clear bug reports with detailed reproduction steps and practical improvement suggestions. My services include: ✅ Localization QA & Translation Review ✅ Manual QA Testing (Web, iOS & Android) ✅ Mobile App & Website Testing ✅ Game Testing & UX Feedback ✅ Bug Reporting with Screenshots & Reproduction Steps ✅ AI Evaluation & Content Review I pay close attention to natural Japanese wording, consistency, usability, and user experience. Rather than translating word-for-word, I evaluate products from the perspective of native Japanese users to ensure they feel intuitive and culturally appropriate. I have successfully completed projects for startups, AI products, mobile applications, websites, games, and localization teams, consistently receiving excellent feedback for my communication, attention to detail, and actionable reports. I particularly enjoy working on games, mobile apps, SaaS products, AI applications, and localization projects where attention to detail makes a real difference. I'm reliable, responsive, easy to work with, and available for both short-term and long-term projects. If you're looking for a detail-oriented Japanese QA tester who genuinely cares about quality and user experience, I'd be happy to help.

🇯🇵Kanazawa, Japan$20/hr100% JSS5.00 (13)Since Mar 2026

Earnings and projects

MRR
$619

Last 6 months ÷ 6

World#68,975 / 412k
🇯🇵Country#147 / 1,269
Revenue, last 30 days
$1.1k

Last 6 months: $3.7k

World#39,136 / 412k
🇯🇵Country#90 / 1,269
Total earnings
$3.9k

Billed in all: $4.1k

World#275,403 / 412k
🇯🇵Country#705 / 1,269
Per project
$171

$218 in the last 6 months

World#275,468 / 412k
🇯🇵Country#872 / 1,269
Projects, last 6 months
17

Across 19 contracts

63% fixed37% hourly
World#7,985 / 412k
🇯🇵Country#8 / 1,269
Projects in all
23

Across 25 contracts

72% fixed28% hourly
World#120,400 / 412k
🇯🇵Country#271 / 1,269

Earnings, last 30 days

$4.1k+$1.1k earned in the last 30 daysBilled in all, before Upwork's fee · drag across the chart to see what was earned in any stretch
$2k$3k$4k$5kOct 8Oct 23Nov 7

Skill rankings: Top 12% in Proofreading

Ranked by MRR among everyone on Upwork with the skill.

  1. #27Localization Testing153 freelancers · 🇯🇵 #1Top 18%
  2. #76English to Japanese Translation529 freelancers · 🇯🇵 #38Top 14%
  3. #103Beta Testing514 freelancers · 🇯🇵 #2Top 20%
  4. #110Japanese898 freelancers · 🇯🇵 #54Top 12%
  5. #140Game Testing852 freelancers · 🇯🇵 #1Top 16%
  6. #161Bug Reports659 freelancers · 🇯🇵 #1Top 24%
  7. #247Localization1,425 freelancers · 🇯🇵 #18Top 17%
  8. #287QA Testing1,392 freelancers · 🇯🇵 #3Top 21%