collaborators

5 papers

cs.CL2026

SoftMatcha 2: A Fast and Soft Pattern Matcher for Trillion-Scale Corpora

Masataka Yoneda, Yusuke Matsushita, Go Kamoda +4

We present SoftMatcha 2, an ultra-fast and flexible search algorithm that enables search over trillion-scale natural language corpora in under 0.3 seconds while allowing semantic v…

cs.AI2026

String Seed of Thought: Prompting LLMs for Distribution-Faithful and Diverse Generation

Kou Misaki, Takuya Akiba

We introduce String Seed of Thought (SSoT), a novel prompting method for LLMs that improves Probabilistic Instruction Following (PIF). We define PIF as a task requiring an LLM to s…

cs.LG2026

UnMaskFork: Test-Time Scaling for Masked Diffusion via Deterministic Action Branching

Kou Misaki, Takuya Akiba

Test-time scaling strategies have effectively leveraged inference-time compute to enhance the reasoning abilities of Autoregressive Large Language Models. In this work, we demonstr…

cs.CL2025

Extending the Context of Pretrained LLMs by Dropping Their Positional Embeddings

Yoav Gelberg, Koshi Eguchi, Takuya Akiba +1

So far, expensive finetuning beyond the pretraining sequence length has been a requirement for effectively extending the context of language models (LM). In this work, we break thi…

cs.AI2025

ALE-Bench: A Benchmark for Long-Horizon Objective-Driven Algorithm Engineering

Yuki Imajuku, Kohki Horie, Yoichi Iwata +3

How well do AI systems perform in algorithm engineering for hard optimization problems in domains such as package-delivery routing, crew scheduling, factory production planning, an…