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Yuu Jinnai

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Preprint Jul 2026

JOR-Bench: Japanese Operations Research Benchmarks for Large Language Models

JOR-Bench is a solver-independent benchmark that can be used with any solver or programming language, and consists of pairs of Japanese problem statements and expected numerical answers, which show that OR formulation ability is largely language-neutral for strong multilingual models.

Yuu Jinnai · 0 citations
Preprint Jul 2026

Cost of Reasoning in non-English Languages: A Case Study on Japanese

Reasoning Language Models (RLMs) achieve their strongest performance when they reason in English, the language for which reasoning-oriented training data is most abundant. However, reasoning trace is a clue for model interpretability and safety, and useful in practice for both the model users and for model developers....

Yuu Jinnai · 1 citation
#artificial intelligence Preprint Aug 2026

Orienteering Problem with Uncertain Time-Varying Rewards: Framework and Benchmark for Everyday Service Robotics

We present the orienteering problem with uncertain time-varying rewards (OP-UTVR), a novel variant of the orienteering problem (OP). While most existing OP formulations assume rewards to be known in advance, practical applications involve uncertain and time-varying rewards, as with shifting customer demand for delivery...

Masafumi Endo, Kohei Honda, Yuu Jinnai et al. · 0 citations

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