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Hidetaka Kamigaito

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Who Laughs with Whom? Disentangling Influential Factors in Humor Preferences across User Clusters and LLMs

This study model heterogeneity in humor preferences in Oogiri by clustering users with voting logs and estimating cluster-specific weights over interpretable preference factors using Bradley-Terry-Luce models and finds that user clusters exhibit distinct preference patterns and that the LLM results can resemble those o...

Soichiro Murakami, Hidetaka Kamigaito, Hiroya Takamura et al. · 2 citations
#natural language process... Preprint Sep 2026

Overfitting Mitigation via Singular Value Decomposition in Minimum Bayes Risk Decoding

This work introduces SVD-MBR, which frames the pairwise utility matrix as a noisy information signal, and reveals that this denoising is metric-dependent: neural metrics encode a robust low-rank consensus ideal for SVD, whereas surface-level metrics struggle to separate signal from metric noise.

Riza Setiawan Soetedjo, Yusuke Sakai, Hidetaka Kamigaito et al. · 0 citations
#computer vision Preprint Sep 2026

ExpArt-KG: Artwork Image Description Generation through Iterative Exploration of Knowledge Graphs

This work proposes a framework that efficiently exploits factual information from a knowledge graph via retrieval-augmented generation via retrieval-augmented generation (RAG), with the goal of enabling LVLMs to generate detailed and accurate image explanations.

Y. Kato, Shintaro Ozaki, Kazuki Hayashi et al. · 0 citations
2026

Random Character-Level Perturbations Amplify LLM Jailbreak Attacks

This work finds that models cannot reliably reconstruct the original meaning and layer-wise probe classifiers fail to detect the harmful intent of perturbed prompts, and perturbations can occasionally reduce attack success by inducing off-topic or incoherent responses.

Shuyi Yu, Zhe Cao, Kohei Tsuji et al. · 1 citation

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