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Remote AI training and data labeling jobs in Japan

Looking for remote AI training or data labeling work while located in Japan? OpenTrain is the hiring organization for roles that explicitly accept applicants located in Japan; candidates apply through OpenTrain, and OpenTrain may place or refer successful candidates to the client whose project they will support. Review each live posting carefully because eligibility, hours, qualifications, and pay are specified per role.

  • 100% remote
  • Flexible hours
  • Hourly / per-task pay
  • 6 open roles

Financial Document Review Specialist (French)

Review, edit, and annotate French financial documents to help train AI—remote contractor role with 20+ hours/week and pay between $10–$55/hr. Native French, finance experience, and strong Excel/Word/PowerPoint skills required.

Legal & Finance
Document
Remote · Worldwide
French, English
Part-time · Flexible
Entry level
Hourly · $10–$55/hr

Posted Jun 30, 2026

Financial Documents Specialist (Chinese)

Join OpenTrain as a part-time, remote Financial Documents Specialist working in Chinese to create, review, and format finance documents that help train AI systems. Flexible contractor role (20+ hrs/week, 1–3 months) paying $10–$55/hr for candidates with strong finance document experience.

Legal & Finance
Document
Remote · Worldwide
Chinese, English
Part-time · Flexible
Entry level
Hourly · $10–$55/hr

Posted Jun 30, 2026

Financial Analysis Specialist (Remote, Part-Time Contract)

Join OpenTrain to analyze real-world financial documents, build models, and rate outputs that train next-generation AI. Part-time contractor role (20+ hrs/week), remote, $15–$25/hr; strong Excel, risk-awareness, and clear communication required.

Legal & Finance
Document
Remote · Worldwide
English
Part-time · Flexible
Entry level
Hourly · $15–$25/hr

Posted Jun 30, 2026

Finance AI Training Expert (Remote, Contract)

Review and validate financial documents to help train AI—perform reconciliations, variance analysis, and ERP review. Remote contract, 20+ hrs/week, paid hourly ($10–$55/hr, top rate $55/hr); requires Bachelor's plus 4+ years relevant finance or accounting experience and fluent English.

Legal & Finance
Document
Remote · Worldwide
English
Part-time · Flexible
Entry level
Hourly · $10–$55/hr

Posted Jun 30, 2026

Entrepreneur & Business Systems Specialist

Join OpenTrain to use your real-world business operations experience to evaluate CRMs, project management and automation tools for AI training datasets; part-time contractor work (20+ hrs/week) pays up to $120/hr.

Generative AI & RLHF
Document
Remote · Worldwide
English
Part-time · Flexible
Entry level
Hourly · $50–$120/hr

Posted Jun 30, 2026

English Voice Coach for Voice Synthesis

OpenTrain AI is hiring an English Voice Coach to evaluate and improve AI-generated voice performances—pronunciation, modulation, emotion, and dialect guidance. Part-time contract work (under 20 hrs/week), remote, pay range $30–$65/hr.

Audio & Speech
Audio
Remote · Worldwide
English
Part-time · Flexible
Entry level
Hourly · $30–$65/hr

Posted Jun 30, 2026

English Audio Transcription Specialist

Join OpenTrain AI as a remote English Audio Transcription Specialist transcribing and correcting audio to train next‑generation AI, $20–30/hr. Part‑time contractor role (20+ hours/week) for experienced transcribers who can tag metadata and follow strict quality standards.

Audio & Speech
Audio
Remote · Worldwide
English
Part-time · Flexible
Intermediate level
Hourly · $20–$30/hr

Posted Jun 30, 2026

Engineering Technical Documentation Reviewer

Join OpenTrain AI as a remote Engineering Technical Documentation Reviewer earning $40–$50/hr by reviewing blueprints, CAD outputs, and inspection reports to train AI systems. This part-time contractor role requires 20+ hours/week, English fluency, and real-world technical documentation experience.

Generative AI & RLHF
Document
Remote · Worldwide
English
Part-time · Flexible
Entry level
Hourly · $40–$50/hr

Posted Jun 30, 2026

Excel Data Analyst for AI Training

Join OpenTrain AI as a part-time Excel Data Analyst working 20+ hours/week to clean, validate, and analyze document datasets used for text-generation and evaluation tasks. Earn $40–$55/hr (USD) while producing the reports and visualizations that improve AI training workflows.

Generative AI & RLHF
Document
Remote · Worldwide
English
Part-time · Flexible
Entry level
Hourly · $40–$55/hr

Posted Jun 30, 2026

Child and Online Safety Expert

Join OpenTrain AI as a contracted Child and Online Safety Expert to design taxonomies, detection frameworks, and clinical response rubrics that help AI systems recognize and respond to youth self-harm, eating disorders, and online exploitation. Remote, part-time work (20+ hrs/week) paying $50–$90/hr

Generative AI & RLHF
Text
Remote · Worldwide
English
Part-time · Flexible
Entry level
Hourly · $50–$90/hr

Posted Jun 30, 2026

Remote Chemical Safety & Toxicology Expert

Contract role for chemical safety and toxicology experts to evaluate model outputs and documents; $50–$90/hr, 20+ hours/week, with estimated project earnings of $8,000–$14,400. Work remotely for OpenTrain AI to shape how AI systems handle hazardous-chemicals content.

Medical & Health
Document
Remote · Worldwide
English
Part-time · Flexible
Expert level
Hourly · $50–$90/hr

Posted Jun 30, 2026

Business Presentation Consultant

Use expert PowerPoint and business-communication skills to create and evaluate executive-ready presentations that teach AI how to produce polished slide decks. Remote contract, 20+ hours/week, $30–$55/hr for part-time consultants.

Writing & Editing
Document
Remote · Worldwide
English
Part-time · Flexible
Entry level
Hourly · $30–$55/hr

Posted Jun 30, 2026

Business Document Review Specialist (Portuguese)

Join OpenTrain to evaluate AI-generated business documents in Portuguese, working remotely 20+ hrs/week as a contractor; assess Excel, PowerPoint and Word deliverables and provide actionable feedback. Pay range: $20–$70 USD/hr (up to $70/hr).

Generative AI & RLHF
Document
Remote · Worldwide
Portuguese
Part-time · Flexible
Intermediate level
Hourly · $20–$70/hr

Posted Jun 30, 2026

Business Document Review Specialist (Korean)

Evaluate AI-generated business documents in Korean across finance, strategy, marketing, and operations. Remote contractor role, $30–$70/hr, 20+ hours/week — use Excel/PowerPoint/Word to test realistic scenarios and give actionable feedback that improves AI outputs.

Generative AI & RLHF
Text
Remote · Worldwide
Korean
Part-time · Flexible
Intermediate level
Hourly · $30–$70/hr

Posted Jun 30, 2026

Japanese Business Document Review Specialist

Work remotely reviewing and improving AI-generated business documents in Japanese—provide structured, professional feedback across finance, strategy, marketing, and operations. Part-time contractor role (20+ hrs/week) paying up to $70/hr for experienced business professionals.

Generative AI & RLHF
Document
Remote · Worldwide
Japanese
Part-time · Flexible
Expert level
Hourly · $30–$70/hr

Posted Jun 30, 2026

French Business Document AI Review Expert

Remote contract role evaluating AI-generated French business documents across finance, strategy, marketing, and operations; 20+ hours/week and pay between $20–$70 USD per hour. Use Excel, PowerPoint, and Word to critique outputs, deliver structured feedback, and help make AI business writing more ac

Generative AI & RLHF
Text
Remote · Worldwide
French
Part-time · Flexible
Entry level
Hourly · $20–$70/hr

Posted Jun 30, 2026

Biosecurity & Synthetic Biology Expert (Remote)

Join OpenTrain as a remote Biosecurity & Synthetic Biology Expert to evaluate AI outputs for biosecurity risk, working ~20 hrs/week on a 1–3 month contract at $50–$90/hr (est. $8k–$14.4k). Use your biorisk and synthetic biology expertise to rate model responses and provide clear, evidence-based feed

Generative AI & RLHF
Text
Remote · Worldwide
English
Part-time · Flexible
Entry level
Hourly · $50–$90/hr

Posted Jun 30, 2026

AI Response Evaluator (Remote Contract)

Join OpenTrain to score and annotate AI-generated text, working 20+ hours/week as a remote contractor. Help improve model relevance, coherence, and factual accuracy across business, finance, healthcare, legal, and research topics at $20–$40/hr.

Generative AI & RLHF
Text
Remote · Worldwide
English
Part-time · Flexible
Intermediate level
Hourly · $20–$40/hr

Posted Jun 30, 2026

AI Jailbreak & Prompt-Injection Security Expert

OpenTrain AI seeks an adversarial ML / red-team specialist to design safety tests, stress-test LLMs for prompt-injection and tool-use abuse, and build regression suites. Part-time contractor role (remote, 20+ hrs/week) paying USD $50–$90/hr.

Generative AI & RLHF
Text
Remote · Worldwide
English
Part-time · Flexible
Entry level
Hourly · $50–$90/hr

Posted Jun 30, 2026

Image Evaluation Specialist (Remote, Part-Time)

Join OpenTrain AI as a remote Image Evaluation Specialist reviewing images against detailed rubrics for $20–$30/hr, 20+ hours/week. Evaluate image quality, flag edge cases, and write concise review explanations to help calibrate AI training datasets.

Image & Video Annotation
Image
Remote · Worldwide
English
Part-time · Flexible
Entry level
Hourly · $20–$30/hr

Posted Jun 30, 2026

Research and Document Review Specialist (Remote, Contract)

Join OpenTrain as a contractor to conduct in-depth research, review and prepare Word/PDF documents, and synthesize academic and industry literature for AI training projects; remote, 20+ hours/week, hourly pay up to $55.

Writing & Editing
Document
Remote · Worldwide
English
Part-time · Flexible
Intermediate level
Hourly · $20–$55/hr

Posted Jun 30, 2026

Nuclear & Radiological Security Expert (RLHF Evaluation)

Join OpenTrain AI to define safety standards, escalation protocols, and abstraction frameworks for nuclear and radiological risk evaluation; remote, 20+ hrs/week, $50–$90/hr. Help shape how advanced models handle sensitive nuclear security information.

Generative AI & RLHF
Document
Remote · Worldwide
English
Part-time · Flexible
Entry level
Hourly · $50–$90/hr

Posted Jun 30, 2026

Engineering Diagram Graph Annotator

Annotate engineering diagrams as graphs: draw tight bounding boxes for symbols (7 classes plus routing nodes) and label edges (solid/non-solid). Small paid pilot followed by a ~60-sheet batch; tooling experience with Label Studio or CVAT required.

Image & Video Annotation
Image
Remote · Worldwide
Flexible hours
Intermediate level
Fixed price · $499

Posted Jun 30, 2026

Angular Front-End Code Reviewer

Join OpenTrain as a remote Angular code reviewer helping AI learn from expert front-end feedback; contractor, asynchronous work at $30–$90/hr for 20+ hours/week. Apply if you have strong Angular, RxJS, and SCSS/SASS experience and clear written communication.

Coding & Software
Computer Code Programming
Remote · Worldwide
English
Part-time · Flexible
Entry level
Hourly · $30–$90/hr

Posted Jun 29, 2026

Rust Backend Developer, API & AI Tool Evaluation

Join OpenTrain as a remote, contract Rust backend developer to build and harden REST/GraphQL APIs and run focused evaluations of AI-powered coding tools (Cursor). Part-time role (<20 hrs/week) paying $30–$90/hr for clear, well-documented backend feedback.

Coding & Software
Text
Remote · Worldwide
English
Part-time · Flexible
Entry level
Hourly · $30–$90/hr

Posted Jun 29, 2026

Java Backend Engineer, AI Training

Join OpenTrain as a Java Backend Engineer supporting AI system training—build Spring Boot microservices, optimize performance, and deliver high-quality code and documentation. Part-time contractor role, 20+ hrs/week, remote, paid hourly (up to $90/hr).

Coding & Software
Computer Code Programming
Remote · Worldwide
English
Part-time · Flexible
Entry level
Hourly · $30–$90/hr

Posted Jun 29, 2026

Business Document AI Review Expert, German Speaker

Remote German-speaking reviewer needed to evaluate and improve AI-generated business documents across finance, strategy, marketing, and operations. Part-time contractor role (20+ hrs/week) with pay up to $70/hr evaluating document quality and delivering structured feedback.

Generative AI & RLHF
Document
Remote · Worldwide
German
Part-time · Flexible
Entry level
Hourly · $20–$70/hr

Posted Jun 29, 2026

Financial Planning and Analysis Expert for AI Training

Join OpenTrain as a Financial Planning & Analysis Expert to support AI training with financial modeling, rubric creation, and evaluation of reporting. Remote, contract role (20+ hrs/week) paid hourly — $35–$58/hr (top rate $58/hr), worldwide applicants welcome.

Generative AI & RLHF
Document
Remote · Worldwide
English
Part-time · Flexible
Intermediate level
Hourly · $35–$58/hr

Posted Jun 29, 2026

Policy Document Review Consultant

Remote contract role reviewing and refining policy, legal, healthcare, academic, and finance documents for AI training workflows. Requires 3+ years in government policy operations, advanced Word/PDF skills, and availability 20+ hrs/week; paid $20–$58/hr.

Legal & Finance
Document
Remote · Worldwide
English
Part-time · Flexible
Intermediate level
Hourly · $20–$58/hr

Posted Jun 29, 2026

Investment Banking AI Reviewer

Contract, part-time remote role reviewing financial models, pitch books, and valuations to train AI; pay $30–$65/hr and 20+ hrs/week. Bring investment banking expertise to improve dataset quality and model outputs.

Legal & Finance
Document
Remote · Worldwide
English
Part-time · Flexible
Entry level
Hourly · $30–$65/hr

Posted Jun 29, 2026

What this work can involve

Work labeled for applicants in Japan covers tasks that help teach and evaluate machine-learning systems. Depending on the posting, that can include annotating images or video, transcribing or recording audio, writing or rating model responses, evaluating search results, translating text, reviewing code, or applying subject-matter knowledge to label or verify content. Exact responsibilities, acceptance criteria, and deliverables vary by assignment, so inspect the individual posting for the project you want to apply to.

  • Annotation and labeling: marking objects, bounding boxes, categories, or attributes in images and video clips.
  • Language and content tasks: transcribing audio, translating text, writing or rating conversational responses, and evaluating search relevance.
  • Specialized reviews: code review, expert validation, or applying subject-matter knowledge to judge accuracy or safety.

How hiring works through OpenTrain

All applications for these roles go through OpenTrain. OpenTrain is the hiring organization for roles open to applicants located in Japan, and OpenTrain may place or refer successful candidates to the client whose project they will support. The live posting for each role is the authoritative source for eligibility, qualifications, hours, pay, location rules, and any client-specific requirements.

  • Apply through OpenTrain; individual listings state required qualifications and eligibility.
  • OpenTrain may place or refer selected candidates to the client whose project they support.

Frequently asked questions

What can this work involve?
AI training work for applicants located in Japan can involve many different tasks used to improve models: tagging or labeling images and video, transcribing or recording speech, translating or checking text, writing or rating model outputs, judging search results, or reviewing code and expert content. Each posting specifies the exact duties, required skills, and any language or regional requirements you must meet, so read the live posting for the role you are considering.
Where can I find role-specific details?
Individual live postings are the only source of truth for details such as who is eligible, what the responsibilities are, required qualifications, hours, schedule, and pay. If a listing accepts applicants located in Japan, that acceptance and any additional restrictions will be named on the posting. Inspect the posting closely to confirm whether you meet the listed requirements before applying.
How does hiring work through OpenTrain?
Hiring for these roles is handled through OpenTrain; candidates apply through OpenTrain, and OpenTrain may place or refer successful candidates to the client whose project they will support. The live posting will indicate any role-specific eligibility, qualifications, and client rules you must meet.