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1<!DOCTYPE html> <html lang="en"> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <title> Haruki Yajima - 矢島陽樹 </title> <meta name="author" content="Haruki Yajima"> <meta name="description" content="Personal website of Haruki Yajima, featuring research, projects, and resume. "> <meta name="keywords" content="haruki yajima, 矢島陽樹, machine learning, systems, portfolio, research"> <link rel="stylesheet" href="/assets/css/bootstrap.min.css?a4b3f509e79c54a512b890d73235ef04"> <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/[email protected]/css/mdb.min.css" integrity="sha256-jpjYvU3G3N6nrrBwXJoVEYI/0zw8htfFnhT9ljN3JJw=" crossorigin="anonymous"> <link defer rel="stylesheet" href="/assets/css/academicons.min.css?f0b7046b84e425c55f3463ac249818f5"> <link defer rel="stylesheet" href="/assets/css/scholar-icons.css?62b2ac103a88034e6882a5be5f3e2772"> <link defer rel="stylesheet" type="text/css" href="https://fonts.googleapis.com/css?family=Roboto:300,400,500,700|Roboto+Slab:100,300,400,500,700|Material+Icons&amp;display=swap"> <link defer rel="stylesheet" href="/assets/css/jekyll-pygments-themes-github.css?591dab5a4e56573bf4ef7fd332894c99" media="" id="highlight_theme_light"> <link rel="shortcut icon" href="/assets/img/favicon.png?d187681e9d711f69f7e4f1e1e5a94f70"> <link rel="stylesheet" href="/assets/css/main.css?d41d8cd98f00b204e9800998ecf8427e"> <link rel="canonical" href="https://haruk1y.github.io/"> </head> <body class="fixed-top-nav "> <header> <nav id="navbar" class="navbar navbar-light navbar-expand-sm fixed-top" role="navigation"> <div class="container"> <button class="navbar-toggler collapsed ml-auto" type="button" data-toggle="collapse" data-target="#navbarNav" aria-controls="navbarNav" aria-expanded="false" aria-label="Toggle navigation"> <span class="sr-only">Toggle navigation</span> <span class="icon-bar top-bar"></span> <span class="icon-bar middle-bar"></span> <span class="icon-bar bottom-bar"></span> </button> <div class="collapse navbar-collapse text-right" id="navbarNav"> <ul class="navbar-nav ml-auto flex-nowrap"> <li class="nav-item active"> <a class="nav-link" href="/">about <span class="sr-only">(current)</span> </a> </li> <li class="nav-item "> <a class="nav-link" href="/cv/">cv </a> </li> <li class="nav-item "> <a class="nav-link" href="/projects/">projects </a> </li> <li class="nav-item "> <a class="nav-link" href="https://haruk1y.github.io/wiki/blog">blog </a> </li> <li class="nav-item "> <a class="nav-link" href="https://haruk1y.github.io/wiki/">wiki </a> </li> <li class="nav-item "> <a class="nav-link" href="/research/">research </a> </li> <li class="nav-item"> <button id="search-toggle" title="Search" onclick="openSearchModal()"> <span class="nav-link">ctrl k <i class="ti ti-search"></i></span> </button> </li> </ul> </div> </div> </nav> <progress id="progress" value="0"> <div class="progress-container"> <span class="progress-bar"></span> </div> </progress> </header> <div class="container mt-5" role="main"> <div class="post"> <article> <div class="about-intro clearfix"> <header class="post-header"> <h1 class="post-title"> Haruki Yajima / 矢島陽樹 </h1> <p class="desc"></p> </header> <div class="profile float-right"> <figure> <picture> <source class="responsive-img-srcset" srcset="/assets/img/haruki_profile-480.webp 480w,/assets/img/haruki_profile-800.webp 800w,/assets/img/haruki_profile-1400.webp 1400w," type="image/webp" sizes="(max-width: 360px) 110px, (max-width: 575px) 140px, (min-width: 930px) 270.0px, 30vw"> <img src="/assets/img/haruki_profile.png?9d44797f2234a3c2f47f225217167ed9" class="img-fluid z-depth-1 rounded" width="100%" height="auto" alt="haruki_profile.png" loading="eager" onerror="this.onerror=null; $('.responsive-img-srcset').remove();"> </source></picture> </figure> </div> <div> <p>I am <span class="text-accent">Haruki Yajima</span>, a first-year master’s student at The University of Tokyo. I am enrolled in the Department of Information and Communication Engineering at the Graduate School of Information Science and Technology.</p> <p>My research interests lie in <span class="text-accent">AI safety</span> and <span class="text-accent">trustworthy AI</span>. I currently work as a research assistant with Prof. <a href="https://research.nii.ac.jp/~iechizen/official/index-e.html" rel="external nofollow noopener" target="_blank">

1Isao Echizen</a> on AI safety. As an undergraduate, I worked with Prof. <a href="https://yusukematsui.me/index.html" rel="external nofollow noopener" target="_blank">Yusuke Matsui</a> on reliable pruning methods for machine learning models. This work was accepted to ICML 2026 (CORE: A*).</p> <p>I am also interested in bringing AI technologies into real-world applications. At <a href="https://ailab.supercell.com/" rel="external nofollow noopener" target="_blank">Supercell AI Innovation Lab</a>, with support from Supercell, I explore new game experiences powered by AI. As an ML engineer intern at <a href="https://mindinadevice.com/" rel="external nofollow noopener" target="_blank">MinD in a Device</a>, I worked on inspection and measurement applications using 3D reconstruction technologies.</p> </div> </div> <h2> <a href="/news/" style="color: inherit">news</a> </h2> <div class="news"> <div class="table-responsive"> <table class="table table-sm table-borderless"> <tr> <th scope="row" style="width: 20%">May 01, 2026</th> <td> My first-author paper has been accepted to ICML 2026! </td> </tr> <tr> <th scope="row" style="width: 20%">Mar 23, 2026</th> <td> I have joined the Supercell AI Innovation Lab! </td> </tr> </table> </div> </div> <h2> <a href="/research/" style="color: inherit">research</a> </h2> <div class="publications publications-home"> <ol class="bibliography"><li> <div class="row"> <div class="col col-sm-2 abbr"> <figure> <picture> <img src="/assets/img/publication_preview/pine_thumbnail.png" class="preview z-depth-1 rounded" width="100%" height="auto" alt="pine_thumbnail.png" data-zoomable loading="eager" onerror="this.onerror=null; $('.responsive-img-srcset').remove();"> </picture> </figure> <abbr class="badge rounded w-100" style="background-color:#2563eb"> <a href="https://icml.cc/" rel="external nofollow noopener" target="_blank">ICML (CORE:A*)</a> </abbr> </div> <div id="yajima2026pine" class="col-sm-8"> <div class="title">PINE: Pruning Boosted Tree Ensembles with Conformal In-Distribution Prediction Equivalence</div> <div class="author"> <em>Haruki Yajima</em> and Yusuke Matsui </div> <div class="periodical"> <em>International Conference on Machine Learning (ICML)</em>, 2026 </div> <div class="links"> <a href="https://haruk1y.github.io/pine-icml/" class="btn btn-sm z-depth-0" role="button">Project Page</a> <a href="https://arxiv.org/abs/2605.28068" class="btn btn-sm z-depth-0" role="button" rel="external nofollow noopener" target="_blank">Paper</a> <a href="https://github.com/Haruk1y/pine" class="btn btn-sm z-depth-0" role="button" rel="external nofollow noopener" target="_blank">Code</a> </div> </div> </div> </li></ol> </div> <div class="social"> <div class="contact-icons"> <a href="mailto:%79%61%6A%69%6D%61.%63%6F%64%65@%67%6D%61%69%6C.%63%6F%6D" title="email"><i class="fa-solid fa-envelope"></i></a> <a href="https://github.com/Haruk1y" title="GitHub" rel="external nofollow noopener" target="_blank"><i class="fa-brands fa-github"></i></a> <a href="https://www.linkedin.com/in/haruki-yajima" title="LinkedIn" rel="external nofollow noopener" target="_blank"><i class="fa-brands fa-linkedin"></i></a> <a href="https://scholar.google.com/citations?user=AJD7xnQAAAAJ" title="Google Scholar" rel="external nofollow noopener" target="_blank"><i class="ai ai-google-scholar"></i></a> <a href="https://twitter.com/Haruk1y_" title="X" rel="external nofollow noopener" target="_blank"><i class="fa-brands fa-x-twitter"></i></a> </div> <div class="contact-note">The fastest way to reach me is email. </div> </div> </article> </div> </div> <footer class="fixed-bottom" role="contentinfo"> <div class="container mt-0"> © Copyright 2026 Haruki Yajima. © Haruki Yajima. </div> </footer> 

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