diff --git a/www-apps/kosuzu/Manifest b/www-apps/kosuzu/Manifest
new file mode 100644
index 0000000..316d3b7
--- /dev/null
+++ b/www-apps/kosuzu/Manifest
@@ -0,0 +1 @@
+DIST kosuzu-82.tar.gz 27528 BLAKE2B 5b6f958596015da2f8a7de705d8ad5e0a16ae69e91212ff943d538bdc6f9d69750549bb2825531b61e3a79f45f18499bd85444f28a0ceeb0759c4e06f47ac573 SHA512 143ddc0782df3f35e248955676e1be72f2930d8b21ded688319296b9c5e2f0757660c344e97982576530ffcbf6cbdb7403cc8203eb5b875a18a9e410dcc51ae4
diff --git a/www-apps/kosuzu/kosuzu-82.ebuild b/www-apps/kosuzu/kosuzu-82.ebuild
new file mode 100644
index 0000000..fc4cbf8
--- /dev/null
+++ b/www-apps/kosuzu/kosuzu-82.ebuild
@@ -0,0 +1,26 @@
+# Copyright 2026 Shin'ya Minazuki
+
+EAPI=8
+
+inherit dune
+
+DESCRIPTION="Text archival and exchange"
+HOMEPAGE="https://projects.laidback.moe/kosuzu"
+SRC_URI="https://mirror.chaotic.ninja/software/${P}.tar.gz"
+
+LICENSE="EUPL-1.2"
+SLOT="0"
+KEYWORDS="~amd64"
+
+IUSE="ocamlopt"
+
+DEPEND="
+	>=dev-ml/cmdliner-1.3.0
+	dev-ml/msgpck
+	dev-ml/ocurl
+	dev-ml/text_parse
+"
+RDEPEND="${DEPEND}"
+BDEPEND="${DEPEND}"
+
+S="${WORKDIR}/${PN}"
diff --git a/www-apps/kosuzu/metadata.xml b/www-apps/kosuzu/metadata.xml
new file mode 100644
index 0000000..a9ea785
--- /dev/null
+++ b/www-apps/kosuzu/metadata.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE pkgmetadata SYSTEM "https://www.gentoo.org/dtd/metadata.dtd">
+<pkgmetadata>
+	<maintainer type="person">
+		<email>shinyoukai@laidback.moe</email>
+		<name>Shin'ya Minazuki</name>
+	</maintainer>
+</pkgmetadata>