Kentaro Kojima

Key Skills

Software

Data Annotation Tech

Labelbox

Scale AI

Top Subject Matter

Japanese language AI content

Japanese language AI content quality

Japanese AI generative models

Top Data Types

Audio

Text

Video

Top Label Types

Audio Recording

Evaluation Rating

Text Generation

Text Summarization

Translation Localization

Freelancer Overview

Japanese AI Trainer. Brings 13+ years of professional experience across complex professional workflows, research, and quality-focused execution. Core strengths include Scale AI, Cohere, and xAI. AI-training focus includes data types such as Text and labeling workflows including Evaluation and Rating.

Labeling Experience

AI Tutor (Japanese)

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As an AI Tutor at xAI Corp., I specialized in Japanese-language annotation for text, audio, and video content. I worked on multi-step tasks improving generative AI model quality through detailed review and collaborative annotation. This required careful interpretation and high consistency in applying guidelines to diverse media types. • Performed annotation tasks on text, audio, and video data • Collaborated with team on complex, multi-modal projects • Contributed to refining generative model outputs • Maintained high standards for accuracy and quality

As an AI Tutor at xAI Corp., I specialized in Japanese-language annotation for text, audio, and video content. I worked on multi-step tasks improving generative AI model quality through detailed review and collaborative annotation. This required careful interpretation and high consistency in applying guidelines to diverse media types. • Performed annotation tasks on text, audio, and video data • Collaborated with team on complex, multi-modal projects • Contributed to refining generative model outputs • Maintained high standards for accuracy and quality

2025 - 2026

Senior Data Quality Specialist

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As a Senior Data Quality Specialist at Cohere, I completed advanced Japanese-language annotation and evaluation tasks. I regularly reviewed work from other annotators and contributed to training and learning program development. The tasks required careful application of language judgment and consistency in interpreting complex content. • Advanced annotation of AI-generated Japanese texts • Quality review and feedback for other annotators • Supported development of training program materials • Maintained consistent evaluation standards

As a Senior Data Quality Specialist at Cohere, I completed advanced Japanese-language annotation and evaluation tasks. I regularly reviewed work from other annotators and contributed to training and learning program development. The tasks required careful application of language judgment and consistency in interpreting complex content. • Advanced annotation of AI-generated Japanese texts • Quality review and feedback for other annotators • Supported development of training program materials • Maintained consistent evaluation standards

2024 - 2025

Japanese AI Trainer

Scale AIText

As a Japanese AI Trainer at Outlier (through Scale AI), I supported annotation and evaluation of AI-generated Japanese content. My core tasks included reviewing outputs for accuracy, fact-checking, and style evaluation based on detailed instructions. I consistently ensured that cultural nuances and clarity were maintained in all content evaluations. • Focused on accuracy and clarity in language evaluation • Applied fact-checking and instruction-following to content • Ensured outputs aligned with Japanese cultural context • Adhered to rigorous AI annotation guidelines

As a Japanese AI Trainer at Outlier (through Scale AI), I supported annotation and evaluation of AI-generated Japanese content. My core tasks included reviewing outputs for accuracy, fact-checking, and style evaluation based on detailed instructions. I consistently ensured that cultural nuances and clarity were maintained in all content evaluations. • Focused on accuracy and clarity in language evaluation • Applied fact-checking and instruction-following to content • Ensured outputs aligned with Japanese cultural context • Adhered to rigorous AI annotation guidelines

2024 - 2024

Education

Work History