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Koichi Tomikawa

Koichi Tomikawa

Versatile Bilingual LLM Evaluator & Audio QC Specialist (Japanese)

Japan flagTosu, Japan
$30.00/hrIntermediateOneformaInternal Proprietary Tooling

Key Skills

Software

OneFormaOneForma
Internal/Proprietary Tooling

Top Subject Matter

No subject matter listed

Top Data Types

AudioAudio
DocumentDocument
TextText

Top Task Types

Classification
Evaluation Rating
Translation Localization

Freelancer Overview

Versatile AI Training Specialist with 3+ years of experience in Language Evaluation, Content QA, and Speech/Audio production. I am a proficient Bilingual LLM Evaluator specializing in assessing AI-generated responses for accuracy, clarity, and intent alignment in Japanese and English. My expertise includes providing structured feedback to enhance Large Language Model outputs and reviewing complex academic/business texts. I have hands-on experience across key labeling types, including Classification, Evaluation/Preference Ranking, and Transcription, ensuring high data integrity. My unique background includes substantial experience as a Professional Voice-over Artist, where I contributed thousands of recorded phrases for AI training datasets and excelled in Audio Quality Control (QC) for Text-to-Speech (TTS) projects. I am adept at identifying and noting issues related to naturalness and accuracy in audio outputs. I am highly skilled in written English communication, enabling seamless collaboration with international clients across various global projects. My commitment is to leverage linguistic nuance and quality assurance skills to optimize cutting-edge AI systems.

IntermediateEnglishJapanese

Labeling Experience

Bilingual LLM Response Evaluation and Fine-Tuning Data Generation

Internal Proprietary ToolingTextClassificationFine Tuning
Evaluated Japanese LLM outputs for accuracy, clarity, relevance, and safety. Provided structured, detailed English feedback to guide model fine-tuning and improve response quality. Reviewed academic and business documents for content integrity.

Evaluated Japanese LLM outputs for accuracy, clarity, relevance, and safety. Provided structured, detailed English feedback to guide model fine-tuning and improve response quality. Reviewed academic and business documents for content integrity.

2024

AI Training Data Production and Audio Quality Control (QC) (TTS/Speech)

Internal Proprietary ToolingAudioAudio Recording
Produced thousands of recorded conversational phrases for Japanese AI training datasets as a Voice-over Artist. Performed essential self-QC and Conducted Audio QC on TTS outputs, checking for unnatural rhythm, dropouts, and errors to ensure data quality.

Produced thousands of recorded conversational phrases for Japanese AI training datasets as a Voice-over Artist. Performed essential self-QC and Conducted Audio QC on TTS outputs, checking for unnatural rhythm, dropouts, and errors to ensure data quality.

2022

Education

K

Kurume University

Bachelor's Degree, Economics

Bachelor's Degree
2001 - 2005

Work History

S

Social Welfare Corporation

Social Worker

Saga
2008 - 2022