Senior Japanese Localization Linguist

About OpenTrain

OpenTrain AI is the hiring and contracting organization for this role. OpenTrain is the #1 platform for finding and building careers in AI training and data labeling, helping people discover opportunities to teach and improve modern AI systems.

• Free OpenTrain account creation
• Fully remote work
• Hourly contractor engagement
• Work available for candidates in Japan

About AI Training and Localization

AI training is the human side of building artificial intelligence. People review, write, translate, and evaluate examples that help AI systems produce more accurate, useful, and culturally appropriate responses.

In this role, your localization expertise will help assess how AI performs in Japanese, including its reasoning quality, clarity, terminology, tone, cultural nuance, and potential bias.

• Contribute to the development of cutting-edge AI systems
• Use language expertise in flexible, remote work
• Help improve the quality of Japanese AI experiences

The Role

OpenTrain AI is seeking a Senior Japanese Localization Linguist to review and generate AI training content, evaluate AI responses, and provide expert written feedback. You will help test models for accuracy and bias while ensuring localized outputs are clear, accurate, consistent, and culturally appropriate.

This fully remote, hourly contractor role is open to candidates in Japan and pays $24-$31 per hour, with a listed rate of $28 per hour.

• Role type: Contractor
• Location: Remote, Japan
• Language: Japanese, with C1 English required
• Pay: $24-$31 per hour
• Data type: Text
• Work includes evaluation, rating, and text generation

What You'll Do

You will apply professional localization and translation judgment to AI-generated and AI training content. Your evaluations should be supported by clear, consistent rationales that follow structured guidelines.

• Generate and review Japanese AI training content
• Evaluate AI responses for reasoning quality, problem-solving, and clarity
• Assess accuracy, tone, register, inclusivity, terminology consistency, and cultural nuance
• Test AI models for accuracy and bias
• Fact-check localized content, including units, names, dates, and references
• Apply MQM or LQA frameworks using severity, category, and root-cause analysis
• Use CAT tools, translation memory, termbases, and quality assurance workflows
• Write clear explanations and consistent rationales for quality decisions

Requirements

This is a senior-level language and localization role requiring strong Japanese proficiency, advanced English reading and writing ability, and substantial professional experience. Candidates should be comfortable making detailed quality judgments and explaining those decisions in writing.

• Bachelor’s degree or higher in Japanese Translation, Linguistics, Localization, Communications, or a related field
• Native or near-native Japanese proficiency with strong command of Japanese locale conventions
• Minimum C1 English proficiency in reading and writing
• At least 5 years of professional localization or translation experience
• Experience applying MQM or LQA frameworks
• Proficiency with CAT tools, translation memory, termbases, and QA workflows
• Strong fact-checking skills for localized content
• Ability to follow structured guidelines and produce clear, consistent written rationales

Preferred Experience

Experience working with AI data training, annotation, or evaluation is preferred. Familiarity with these workflows can help you transition your localization expertise into model quality and response evaluation.

• Previous AI data training experience
• Previous data annotation experience
• Previous AI response evaluation experience
• Demonstrated attention to cultural nuance and localization quality

How to Apply Through OpenTrain

Create a free OpenTrain account to build your profile and apply for this opportunity. OpenTrain brings together remote AI training work so qualified contributors can find projects and grow experience in this rapidly expanding field.

• Review the role and requirements
• Create or update your OpenTrain profile
• Apply through OpenTrain
• Use your Japanese localization and evaluation expertise to help improve AI