activity
20222026
most citedPredicting drug-gene relations via analogy tasks with word embeddings

4 citations · 5 across the 9 of their papers we have counts for

collaborators

10 papers

cs.CL2026

Language Model Maps for Prompt-Response Distributions via Log-Likelihood Vectors

Momose Oyama, Yusuke Takase, Hidetoshi Shimodaira

We propose a method that represents language models by log-likelihood vectors over prompt-response pairs and constructs model maps for comparing their conditional distributions. In…

cs.CL2026

Domain Mixture Design via Log-Likelihood Differences for Aligning Language Models with a Target Model

Ryo Kishino, Riku Shiomi, Hiroaki Yamagiwa +2

Instead of directly distilling a language model, this study addresses the problem of aligning a base model with a target model in distribution by designing the domain mixture of tr…

cs.CL2025

Likelihood Variance as Text Importance for Resampling Texts to Map Language Models

Momose Oyama, Ryo Kishino, Hiroaki Yamagiwa +1

We address the computational cost of constructing a model map, which embeds diverse language models into a common space for comparison via KL divergence. The map relies on log-like…

cs.CL2025

Establishing a Scale for Kullback-Leibler Divergence in Language Models Across Various Settings

Ryo Kishino, Yusuke Takase, Momose Oyama +2

Log-likelihood vectors define a common space for comparing language models as probability distributions, enabling unified comparisons across heterogeneous settings. We extend this…

cs.CL2025

Mapping 1,000+ Language Models via the Log-Likelihood Vector

Momose Oyama, Hiroaki Yamagiwa, Yusuke Takase +1

To compare autoregressive language models at scale, we propose using log-likelihood vectors computed on a predefined text set as model features. This approach has a solid theoretic…

cs.CL2024

Understanding Higher-Order Correlations Among Semantic Components in Embeddings

Momose Oyama, Hiroaki Yamagiwa, Hidetoshi Shimodaira

Independent Component Analysis (ICA) offers interpretable semantic components of embeddings. While ICA theory assumes that embeddings can be linearly decomposed into independent co…

cs.CL2024

Revisiting Cosine Similarity via Normalized ICA-transformed Embeddings

Hiroaki Yamagiwa, Momose Oyama, Hidetoshi Shimodaira

Cosine similarity is widely used to measure the similarity between two embeddings, while interpretations based on angle and correlation coefficient are common. In this study, we fo…

cs.CL2024★ 4 cited

Predicting drug-gene relations via analogy tasks with word embeddings

Hiroaki Yamagiwa, Ryoma Hashimoto, Kiwamu Arakane +6

Natural language processing (NLP) is utilized in a wide range of fields, where words in text are typically transformed into feature vectors called embeddings. BioConceptVec is a sp…

cs.CL2023★ 1 cited

Discovering Universal Geometry in Embeddings with ICA

Hiroaki Yamagiwa, Momose Oyama, Hidetoshi Shimodaira

This study utilizes Independent Component Analysis (ICA) to unveil a consistent semantic structure within embeddings of words or images. Our approach extracts independent semantic…

cs.CL2022

Norm of Word Embedding Encodes Information Gain

Momose Oyama, Sho Yokoi, Hidetoshi Shimodaira

Distributed representations of words encode lexical semantic information, but what type of information is encoded and how? Focusing on the skip-gram with negative-sampling method,…