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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

Azure OpenAI Developer, Code Review & Evaluation

Hire as a part-time Azure OpenAI developer to review, label, and improve AI-generated code and deployment guidance; requires 5+ years hands-on Azure OpenAI experience, strong English writing, and availability under 20 hrs/week at $20/hr.

Generative AI & RLHF
Computer Code Programming
Remote · Worldwide
Part-time · Flexible
Entry level
Hourly · $20/hr

Posted Mar 10, 2025

Transformers Developer, Code Evaluation & AI Review

Experienced Transformers developer needed to evaluate AI-generated Transformers code, run technical interviews, and provide structured feedback to improve model usage and documentation. Remote, contract, part-time work at $27/hr for contributors with hands-on Hugging Face experience.

Generative AI & RLHF
Computer Code Programming
Remote · Worldwide
Part-time · Flexible
Entry level
Hourly · $27/hr

Posted Mar 10, 2025

ChromaDB Developer, Code Review & Evaluation

OpenTrain AI seeks a ChromaDB developer to review and label AI-generated ChromaDB code, provide structured technical feedback, and run technical screening interviews; part-time contractor, $25/hr, under 20 hrs/week, fully remote.

Coding & Software
Computer Code Programming
Remote · Worldwide
Part-time · Flexible
Entry level
Hourly · $25/hr

Posted Mar 10, 2025

LlamaIndex Developer, Code Review & Evaluation

Join OpenTrain to review and evaluate AI-generated LlamaIndex code and prompts, providing detailed, structured feedback to improve RAG integrations. Remote contract, up to 20 hrs/week at $25/hr; requires 5+ years hands-on LlamaIndex experience and strong English writing.

Coding & Software
Computer Code Programming
Remote · Worldwide
Part-time · Flexible
Entry level
Hourly · $25/hr

Posted Mar 10, 2025

Godot v4 Developer for AI Code Review

Seeking an experienced Godot v4 developer (5+ years) to review, label, and critique AI-generated Godot v4 code and explanations; provide clear, structured feedback to improve AI outputs. Part-time contractor, remote, $25/hr, under 20 hours/week.

Coding & Software
Computer Code Programming
Remote · Worldwide
Part-time · Flexible
Entry level
Hourly · $25/hr

Posted Mar 10, 2025

Angular v17 Developer, AI Code Evaluation

Join OpenTrain as a remote, part-time Angular v17 developer to evaluate and label AI-generated code responses; you’ll identify bugs, suggest improvements, and provide clear written feedback. Requires 5+ years hands-on Angular v17 experience and strong English writing; $20/hr.

Coding & Software
Computer Code Programming
Remote · Worldwide
Part-time · Flexible
Entry level
Hourly · $20/hr

Posted Mar 10, 2025

Shanghainese Speech Evaluator (Remote, Part-Time)

Use your Shanghainese expertise to record and rate AI speech for pronunciation and fluency — remote, flexible contract work at $23/hr. Help iterate AI responses until multiple outputs receive a perfect 7/7 naturalness score.

Audio & Speech
Text
Remote · Worldwide
Part-time · Flexible
Entry level
Hourly · $23/hr

Posted Mar 7, 2025

Singlish Chatbot Trainer: Write, Edit and Rate AI Responses

Join OpenTrain as a part-time contractor helping train an AI chatbot to understand and speak natural Singlish. This role pays $23/hr, requires Singapore native residency, and involves writing, editing, and rating AI-generated Singlish text.

Generative AI & RLHF
Text
Remote · Worldwide
Part-time · Flexible
Entry level
Hourly · $23/hr

Posted Mar 7, 2025

C# Godot Expert, Code Review & Model Evaluation

Join OpenTrain as a remote C# Godot specialist to review and annotate AI-generated C# Godot code, providing clear feedback that improves model output. This part-time contractor role requires 5+ years of Godot experience, excellent English writing, and pays $25/hr for under 20 hours/week.

Coding & Software
Computer Code Programming
Remote · Worldwide
Part-time · Flexible
Entry level
Hourly · $25/hr

Posted Mar 7, 2025

Angular Expert, AI Code Evaluation & Review

Review AI-generated Angular code, assess correctness and best practices, and provide clear written feedback to improve model outputs. Part-time contractor role, $25/hr, remote worldwide, under 20 hours/week.

Coding & Software
Computer Code Programming
Remote · Worldwide
Part-time · Flexible
Entry level
Hourly · $25/hr

Posted Mar 7, 2025

US Culture-Savvy Book Lovers for AI Chat Feedback

Join OpenTrain AI for three short AI-driven chat sessions (60–90 minutes total) about U.S. books and authors, and give feedback on AI reading suggestions. Must be fluent in English, familiar with U.S. culture, love reading, and available for three 20–30 minute sessions; paid $6.65/hr.

Generative AI & RLHF
Text
Remote · Worldwide
Part-time · Flexible
Entry level
Hourly · $6.65/hr

Posted Mar 3, 2025

Board-Certified Radiologist, Remote Medical Image Annotator

Use your ABR/AOBR board certification to annotate DICOM radiology images remotely for a short, high-pay contract: part-time (5–15 hrs/week), 1–2 months at $150/hr. Flexible schedule; work as a contractor on a secure platform with detailed labeling guidelines.

Medical & Health
Medical Dicom
Remote · Worldwide
Part-time · Flexible
Entry level
Hourly · $150/hr

Posted Feb 27, 2025

Create Gold SQL Queries For Sports Database

Build 100 perfect SQL queries that answer natural-language sports questions using a provided database; contract, remote, 20+ hrs/week at $40/hr while working East Coast hours from Monday 24th to Wednesday 26th.

Coding & Software
Text
Remote · Worldwide
Part-time · Flexible
Intermediate level
Hourly · $40/hr

Posted Feb 22, 2025

LLM Trainer for Medical Data Extraction (MIMIC-4)

Contractor wanted to collect urine output and serum creatinine data from MIMIC-4 using MedPALM2 or BioBERT to train an LLM-based scoring model; intermediate experience preferred. Fixed-price contract: USD 1,000; open worldwide.

Medical & Health
Medical Dicom
Remote · Worldwide
Flexible hours
Intermediate level
Fixed price · $1000

Posted Feb 19, 2025

English Text Annotation & Review (Argentina)

Argentina-based freelancers with B2+ English are needed to review and correct pre-annotated English text tags using an online labeling tool; part-time contractor work under 20 hrs/week at $3.50 USD/hour. Entry-level friendly—previous labeling experience and attention to detail are a plus.

General Annotation
Text
Remote · Worldwide
Part-time · Flexible
Entry level
Hourly · $3.5/hr

Posted Feb 17, 2025

Audio Transcription (Native English, USA/Canada)

Transcribe and label short English audio clips for OpenTrain AI on a remote, part-time contract at $15/hr. Native US/Canada speakers with strong listening skills and attention to detail are needed for a 1+ year commitment (1 hour/day, Mon–Fri).

Audio & Speech
Audio
Remote · Worldwide
Part-time · Flexible
Entry level
Hourly · $15/hr

Posted Feb 11, 2025

Creative Prompt & Response Writer, US/Canada

Write original prompt-and-response pairs from website screenshots to improve AI understanding of visual web content; must be a native English speaker based in the U.S. or Canada, available to start immediately and commit 20+ hours/week at $21/hr.

Generative AI & RLHF
Text
Remote · Worldwide
Part-time · Flexible
Intermediate level
Hourly · $21/hr

Posted Feb 4, 2025

Mandarin Electrical Engineering QA Review With Document Matching

Review 50–100 Mandarin electrical engineering QA pairs, verify each answer against provided documents using a document-finding tool, and add precise citations for RAG. Contract, part-time work at $40/hr, ~20–40 hours total and 20+ hrs/week.

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

Posted Feb 3, 2025

Compare Model and Expert Answers for Dutch Corporate Law

Compare 80 model responses to expert (gold) answers for Dutch corporate financial law documents, identify mismatches, and deliver clear top-level insights; remote, contractor role at $40/hr, ~20+ hours/week.

Legal & Finance
Text
Remote · Worldwide
Part-time · Flexible
Intermediate level
Hourly · $40/hr

Posted Jan 28, 2025

Frontend Web Developer (HTML/CSS/JS), India, C1/C2

OpenTrain is hiring frontend developers in India to create Q&A, sketch annotations, and code edits from website screenshots. Must have official C1/C2 English documentation, 2+ years HTML/CSS/JS, immediate availability, 20+ hrs/week at $13/hr.

Coding & Software
Computer Code Programming
Remote · Worldwide
Part-time · Flexible
Entry level
Hourly · $13/hr

Posted Jan 10, 2025

Dutch Speech Annotation, Remote Contract Work

Join OpenTrain AI to annotate short Dutch audio clips (classification & segmentation) in a remote, entry‑level contract project paid as a fixed price of USD 400.26; training on our proprietary tool is provided.

Audio & Speech
Audio
Remote · Worldwide
Flexible hours
Entry level
Fixed price · $400.26

Posted Jan 9, 2025

Flemish Native Speakers, Audio Annotation (Contract)

Join OpenTrain AI as a part-time contractor to transcribe and label audio; native Flemish required, training provided, 20+ hrs/week commitment, $300 fixed payment per project. Work remotely using internal tooling and basic Google Sheets.

Audio & Speech
Audio
Remote · Worldwide
Part-time · Flexible
Entry level
Fixed price · $300

Posted Jan 8, 2025

Bashkir Audio Transcriber & Annotator, Remote, Part-Time

Join OpenTrain to transcribe and label Bashkir audio using our internal tools; training is provided and no prior experience is required. This contractor role asks for 20+ hrs/week (about 3–5 hours daily) and pays a fixed $300 for the assignment.

Audio & Speech
Audio
Remote · Worldwide
Part-time · Flexible
Entry level
Fixed price · $300

Posted Jan 8, 2025

Kabyle Audio Transcription & Annotation (Remote, Part-Time)

Join OpenTrain AI as a remote contractor to transcribe and label Kabyle audio using our internal tools; entry-level candidates receive full training. This contract pays a fixed USD 270 and expects 20+ hours/week (roughly 3–5 hours/day).

Audio & Speech
Audio
Remote · Worldwide
Part-time · Flexible
Entry level
Fixed price · $270

Posted Jan 7, 2025

Haitian Creole Audio Annotator

Join OpenTrain to annotate Haitian Creole audio: transcribe, label speech segments, and apply quality-focused guidelines. Part-time contractor work (20+ hrs/week, ~3–5 hrs/day) with training provided and a fixed price of $270 for the project.

Audio & Speech
Audio
Remote · Worldwide
Part-time · Flexible
Entry level
Fixed price · $270

Posted Jan 7, 2025

Sindhi Audio Transcriber & Speech Labeler

Native Sindhi speakers wanted to transcribe and label audio remotely — training provided and no prior experience required. Part-time contract work (20+ hrs/week; 3–5 hrs/day typical) with a fixed payment of $200 USD using OpenTrain's annotation tools.

Audio & Speech
Audio
Remote · Worldwide
Part-time · Flexible
Entry level
Fixed price · $200

Posted Jan 7, 2025

Native Gujarati Audio Annotator, Remote Part-Time

OpenTrain AI is hiring native Gujarati speakers for a remote audio annotation project (classification and segmentation). Entry-level, training provided; contractors work 20+ hours/week on a part-time schedule for a fixed $100 project payment.

Audio & Speech
Audio
Remote · Worldwide
Part-time · Flexible
Entry level
Fixed price · $100

Posted Jan 7, 2025

Native Tamil Audio Annotator (Remote, Part-Time)

OpenTrain AI seeks native Tamil speakers to annotate audio: segment speech, classify clips, and transcribe recordings. Entry-level, contractor role with a fixed-price payment of $100; expect to work 3–5 hours daily using OpenTrain AI’s annotation tools and provided guidelines.

Audio & Speech
Audio
Remote · Worldwide
Flexible hours
Entry level
Fixed price · $100

Posted Jan 6, 2025

Gujarati Data Annotation Specialist

Join OpenTrain AI to transcribe and segment Gujarati audio using internal tools — training provided and no prior experience required. This contractor role pays a fixed USD 115, requires native Gujarati and basic Google Sheets skills, and asks for 3–5 hours of daily availability.

Audio & Speech
Audio
Remote · Worldwide
Flexible hours
Entry level
Fixed price · $115

Posted Jan 4, 2025

Operating Systems Subject Matter Expert (India, C1 English)

Join OpenTrain to create and refine high-quality AI training data about operating systems — remote work for India-based experts with strong OS, scripting, and documentation skills. $25/hr, part-time contract, <20 hrs/week.

Coding & Software
Computer Code Programming
Remote · Worldwide
Part-time · Flexible
Entry level
Hourly · $25/hr

Posted Jan 2, 2025

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.