JAMMEval: A Refined Collection of Japanese Benchmarks for Reliable VLM Evaluation

Fuente: arXiv
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Hauptverfasser: Sugiura, Issa, Maeda, Koki, Kurita, Shuhei, Oda, Yusuke, Kawahara, Daisuke, Okazaki, Naoaki
Format: Preprint
Veröffentlicht: 2026
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author Sugiura, Issa
Maeda, Koki
Kurita, Shuhei
Oda, Yusuke
Kawahara, Daisuke
Okazaki, Naoaki
author_facet Sugiura, Issa
Maeda, Koki
Kurita, Shuhei
Oda, Yusuke
Kawahara, Daisuke
Okazaki, Naoaki
contents Reliable evaluation is essential for the development of vision-language models (VLMs). However, Japanese VQA benchmarks have undergone far less iterative refinement than their English counterparts. As a result, many existing benchmarks contain issues such as ambiguous questions, incorrect answers, and instances that can be solved without visual grounding, undermining evaluation reliability and leading to misleading conclusions in model comparisons. To address these limitations, we introduce JAMMEval, a refined collection of Japanese benchmarks for reliable VLM evaluation. It is constructed by systematically refining seven existing Japanese benchmark datasets through two rounds of human annotation, improving both data quality and evaluation reliability. In our experiments, we evaluate open-weight and proprietary VLMs on JAMMEval and analyze the capabilities of recent models on Japanese VQA. We further demonstrate the effectiveness of our refinement by showing that the resulting benchmarks yield evaluation scores that better reflect model capability, exhibit lower run-to-run variance, and improve the ability to distinguish between models of different capability levels. We release our dataset and code to advance reliable evaluation of VLMs.
format Preprint
id arxiv_https___arxiv_org_abs_2604_00909
institution arXiv
publishDate 2026
record_format arxiv
spellingShingle JAMMEval: A Refined Collection of Japanese Benchmarks for Reliable VLM Evaluation
Sugiura, Issa
Maeda, Koki
Kurita, Shuhei
Oda, Yusuke
Kawahara, Daisuke
Okazaki, Naoaki
Computer Vision and Pattern Recognition
Reliable evaluation is essential for the development of vision-language models (VLMs). However, Japanese VQA benchmarks have undergone far less iterative refinement than their English counterparts. As a result, many existing benchmarks contain issues such as ambiguous questions, incorrect answers, and instances that can be solved without visual grounding, undermining evaluation reliability and leading to misleading conclusions in model comparisons. To address these limitations, we introduce JAMMEval, a refined collection of Japanese benchmarks for reliable VLM evaluation. It is constructed by systematically refining seven existing Japanese benchmark datasets through two rounds of human annotation, improving both data quality and evaluation reliability. In our experiments, we evaluate open-weight and proprietary VLMs on JAMMEval and analyze the capabilities of recent models on Japanese VQA. We further demonstrate the effectiveness of our refinement by showing that the resulting benchmarks yield evaluation scores that better reflect model capability, exhibit lower run-to-run variance, and improve the ability to distinguish between models of different capability levels. We release our dataset and code to advance reliable evaluation of VLMs.
title JAMMEval: A Refined Collection of Japanese Benchmarks for Reliable VLM Evaluation
topic Computer Vision and Pattern Recognition
url https://arxiv.org/abs/2604.00909