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Takuya Akiba

13 accepted papers

2026

A Fast and Soft Pattern Matcher for Trillion-Scale Corpus

ICML 2026poster

We present an ultra-fast and flexible search algorithm that enables search over trillion-scale natural language corpora in under 0.3 seconds while handling semantic variations (substitution, insertion, and deletion). Our approach employs string matching based on suffix arrays that scales well with c…

Cited by 0SourceScholar
2026

DiffusionBlocks: Block-wise Neural Network Training via Diffusion Interpretation

ICLR 2026poster

End-to-end backpropagation requires storing activations throughout all layers, creating memory bottlenecks that limit model scalability. Existing block-wise training methods offer means to alleviate this problem, but they rely on ad-hoc local objectives and remain largely unexplored beyond classific…

Cited by 0SourcecodeScholar
2026

Extending the Context of Pretrained LLMs by Dropping Their Positional Embedding

ICLR 2026poster

So far, expensive finetuning beyond the pretraining sequence length has been a prerequisite to effectively extend the context of language models (LM). In this work, we break this key bottleneck by ***Dro**pping the **P**ositional **E**mbeddings of LMs after training (DroPE)*. Our simple method is mo…

Cited by 17SourcecodeScholar
2025

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

NeurIPS 2025poster

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, and power-grid balancing? We introduce $\textit{ALE-Bench}$, a new benchmark for evaluating AI systems on score-based algo…

Cited by 0SourcecodeScholar
2025

Agent Skill Acquisition for Large Language Models via CycleQD

ICLR 2025poster

Training large language models to acquire specific skills remains a challenging endeavor. Conventional training approaches often struggle with data distribution imbalances and inadequacies in objective functions that do not align well with task-specific performance. To address these challenges, we i…

2025

Drop-Upcycling: Training Sparse Mixture of Experts with Partial Re-initialization

ICLR 2025poster

The Mixture of Experts (MoE) architecture reduces the training and inference cost significantly compared to a dense model of equivalent capacity. Upcycling is an approach that initializes and trains an MoE model using a pre-trained dense model. While upcycling leads to initial performance gains, the…

Cited by 1SourcePDFScholar
2025

TAID: Temporally Adaptive Interpolated Distillation for Efficient Knowledge Transfer in Language Models

ICLR 2025spotlight

Causal language models have demonstrated remarkable capabilities, but their size poses significant challenges for deployment in resource-constrained environments. Knowledge distillation, a widely-used technique for transferring knowledge from a large teacher model to a small student model, presents…

Cited by 0SourcePDFScholar
2025

Wider or Deeper? Scaling LLM Inference-Time Compute with Adaptive Branching Tree Search

NeurIPS 2025spotlight

Recent advances demonstrate that increasing inference-time computation can significantly boost the reasoning capabilities of large language models (LLMs). Although repeated sampling (i.e., generating multiple candidate outputs) is a highly effective strategy, it does not leverage external feedback s…

Cited by 0SourceScholar
2019

A Graph Theoretic Framework of Recomputation Algorithms for Memory-Efficient Backpropagation

NeurIPS 2019poster

Recomputation algorithms collectively refer to a family of methods that aims to reduce the memory consumption of the backpropagation by selectively discarding the intermediate results of the forward propagation and recomputing the discarded results as needed. In this paper, we will propose a novel…

2019

Sampling Techniques for Large-Scale Object Detection From Sparsely Annotated Objects

CVPR 2019oral

Efficient and reliable methods for training of object detectors are in higher demand than ever, and more and more data relevant to the field is becoming available. However, large datasets like Open Images Dataset v4 (OID) are sparsely annotated, and some measure must be taken in order to ensure the…

Cited by 47PDFScholar
2018

Variance-based Gradient Compression for Efficient Distributed Deep Learning

ICLR 2018workshop

Due to the substantial computational cost, training state-of-the-art deep neural networks for large-scale datasets often requires distributed training using multiple computation workers. However, by nature, workers need to frequently communicate gradients, causing severe bottlenecks, especially on l…

Cited by 94SourceScholar