install

Additional install commands

macOS

Homebrewverified · 100%

brew install kytea

local Homebrew formula metadata

MacPortsverified · 94%

sudo port install kytea

MacPorts ports tree · textproc/kytea/Portfile · source: api.github.com

Linux

Nixverified · 92%

nix profile install nixpkgs#kytea

nixpkgs package indexes · pkgs/by-name/ky/kytea/package.nix · source: api.github.com

overview

Package summary

Toolkit for analyzing text, especially Japanese and Chinese

Project links

Commands and aliases

api-example
kytea
train-kytea

history

Project history and usage

KyTea is the Kyoto Text Analysis Toolkit, a C++ toolkit by Graham Neubig for word segmentation, pronunciation estimation, and other analysis tasks, especially for Japanese and other languages where word or morpheme boundaries are not explicit in raw text.

Project history

The KyTea NEWS file records version 0.0.1 on 2009-11-05 as the initial release of KyWs and KyPe. The public GitHub repository and README describe the later project as a general text-analysis toolkit focused on Japanese and languages requiring segmentation.

KyTea's design sits in the statistical NLP toolkit tradition before transformer-based tokenizers became dominant. It gives researchers and language-processing users a trainable analyzer with command-line tools and a library API rather than a closed dictionary-only analyzer.

Adoption history

KyTea's adoption is mostly academic and language-tooling oriented. It appears in package managers such as Homebrew, MacPorts, and Nix because Japanese and Chinese text-processing workflows often need a reproducible segmenter that can be scripted from Unix pipelines.

How it is used

The package installs kytea for analysis and train-kytea for model training. Users run it to segment text, estimate pronunciations, prepare corpora, or build custom models for domains where default Japanese tokenizers are not enough.

Why package nerds care

KyTea is a nice package-manager artifact because it packages research NLP into classic Unix form: a small binary, a training command, headers, and docs. It is especially useful in multilingual text-analysis stacks where tokenization is a prerequisite rather than the final task.

Timeline

2009-11-05: KyTea 0.0.1 was released as the initial release of KyWs and KyPe.
2009-11-16: The ChangeLog records version 0.0.2 with Shift-JIS support and an Autotools build-system change.
2026-07-01: The GitHub releases page for neubig/kytea listed no packaged GitHub releases, so the historical anchor remains the repository NEWS and source documentation.

Related projects

Related tools and concepts include Japanese morphological analyzers, Chinese word segmentation, MeCab-style tokenization workflows, statistical NLP, corpus preparation, and trainable language-specific text-analysis pipelines.

Sources

security posture

Risk level: green

narrow executable package without higher-risk signals.

Risk classifier

green risk · low confidence · appliance

Why

narrow executable package without higher-risk signals

Signals

metadata:no-higher-risk-signals

Install behavior

No Homebrew post-install hook is recorded in formula metadata.
Homebrew bottle metadata is available for 13 platform targets.

Recommended review

Before unattended agent use, check whether the tool reads plaintext credentials, writes remote state, publishes artifacts, or shells out to plugins.

executables

Installed executables

Command	Kind	Exposure
`api-example`	cli	global executable
`kytea`	cli	global executable
`train-kytea`	cli	global executable

freshness

Version and freshness

These signals separate page generation age, package-manager activity, and upstream release comparison. Version lag is warned only when an evidence URL and comparable versions are present.

page generated2026-07-08

manager version0.4.7

manager updated2026-06-19

local dataok

upstreamnot checked

latest detectednot detected

https://www.phontron.com/kytea/

infoRelease/tag comparison is only available for GitHub repositories.https://www.phontron.com/kytea/none confidence

install metadata

Package metadata

Package key	brew:kytea
Version	0.4.7
Package manager	Homebrew
Package manager page	https://formulae.brew.sh/formula/kytea
Homepage	https://www.phontron.com/kytea/
Repository	https://github.com/neubig/kytea
Upstream docs	https://www.phontron.com/kytea
License	Apache-2.0
Source archive	https://www.phontron.com/kytea/download/kytea-0.4.7.tar.gz
Last updated	2026-06-19T12:31:22-07:00
Pulse	updated
Bottle	available (on arm64_big_sur, arm64_linux, arm64_monterey, arm64_sequoia, arm64_sonoma, arm64_tahoe, arm64_ventura, big_sur, catalina, monterey, sonoma, ventura, x86_64_linux)
Homebrew post-install	not defined
Service	none declared

registry facts

Source database details

Source Database	Homebrew formula API
Tap	homebrew/core
Full Name	kytea
Version Scheme	0
Revision	0
Head Version	HEAD
Bottle Stable Root URL	https://ghcr.io/v2/homebrew/core
Deprecated	no
Disabled	no
Keg Only	no
URL Keys	head stable

source database matches

Other package-manager records

Matches are pulled from external package-manager indexes and kept separate from local Automic Vault package links.

Nix95%

kytea

nix profile install nixpkgs#kytea

normalized package name match
Matched by: Kytea

nixpkgs package indexes · api.github.com · nixpkgs package indexes: pkgs/by-name/ky/kytea/package.nix from https://api.github.com/repos/NixOS/nixpkgs/git/trees/master?recursive=1

MacPorts95%

kytea

sudo port install kytea

normalized package name match
Matched by: Kytea

MacPorts ports tree · api.github.com · MacPorts ports tree: textproc/kytea/Portfile from https://api.github.com/repos/macports/macports-ports/git/trees/master?recursive=1

package graph

Links come from deterministic package relationships, av.db category and tag curation, ecosystem matches, and package hub membership.

source trail

Generated from repository data

This page is generated by av-web from the private package SQLite artifact built by scripts/generate-pkg-sqlite.py.

Combined YAML source

View the package source record on GitHub.

combined/kytea.yml

Used sources

Geiger risk classifier
Nucleus package database
av.db category and tag curation
cross-ecosystem install command graph
curated package history
external package-manager database matches
package relationship graph
package version freshness
package-page enrichment

Install kytea with Homebrew, MacPorts, Nix