install

Additional install commands

macOS

Homebrewverified · 100%

brew install jumanpp

local Homebrew formula metadata

Linux

Nixverified · 92%

nix profile install nixpkgs#jumanpp

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

overview

Package summary

Japanese Morphological Analyzer based on RNNLM

Project links

Commands and aliases

jumanpp
mkdarts_jumanpp

history

Project history and usage

Juman++ is a Japanese morphological analyzer from Kyoto University's NLP group. It was designed to consider semantic plausibility in word sequences with recurrent neural network language models, and version 2 rewrote the toolkit around a faster open C++ implementation.

Project history

Kyoto University's Juman++ page links the project as a Japanese morphological analyzer and cites the 2015 EMNLP paper on morphological analysis for unsegmented languages using recurrent neural network language models.

The GitHub README describes Juman++ as a new analyzer that uses an RNN language model, and states that version 2 improved accuracy and analysis speed by more than 250 times compared with the original Juman++.

The 2018 ACL Anthology system-demonstration paper describes the version 2 toolkit as a C++11/14 lattice-based morphological-analysis library with linear and recurrent neural net language models, plus tools for exposing model problems and partial annotation.

Adoption history

Juman++ gained adoption in Japanese NLP because it improved the accuracy and speed tradeoff of the JUMAN/Jumandic line while keeping a command-line analyzer usable in pipelines.

The Homebrew and Nix packages made the analyzer easy to install for developers outside Kyoto University's downloadable tarball workflow. The project also remained academically citeable through EMNLP 2015, ANLP 2018, EMNLP 2018, and a 2020 Journal of Natural Language Processing paper listed by the README.

How it is used

Users run `jumanpp` with UTF-8 Japanese text and receive one analyzed morpheme per line followed by `EOS`. The README documents options such as `--model`, `--beam`, `--specifics`, `--version`, and `--help`.

The package distribution includes a pretrained model, while the README warns that building directly from Git does not by itself provide a usable model for analysis.

Why package nerds care

Juman++ is notable to package maintainers because the source tree alone is not the product: usable packages need the analyzer and model assets. That tension is visible in the README's warning that release packages are much larger than source snapshots because they include a pretrained model.

It is also a bridge between classic Japanese morphological analyzers and neural NLP tooling: it keeps the Unix filter style while using neural language-model scoring under the hood.

Timeline

2015-09: The RNNLM-based Juman++ work appeared at EMNLP 2015.
2017-12-02: GitHub release v2.0.0-rc1 was published as the first preview.
2018-03-14: GitHub release v2.0.0-rc2 was published.
2018-11: The Juman++ toolkit paper appeared in the EMNLP 2018 system demonstrations.
2023-10-03: GitHub release v2.0.0-rc4 was published.

Related projects

Juman++ is closely related to JUMAN, Jumandic, KNP, PyKNP, and the Kyoto University Text Corpus ecosystem.
The README points to `jumanpp-jumandic` for training a Jumandic model and to tutorial code for building analyzers for other scriptio continua settings.

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.
Installs with 1 runtime dependencies.
Build metadata lists 1 build dependencies.

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	Note
`jumanpp`	cli	global executable
`mkdarts_jumanpp`	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 version1.02

manager updated

local dataok

upstreamnot checked

latest detectednot detected

https://nlp.ist.i.kyoto-u.ac.jp/EN/index.php?JUMAN%2B%2B

infoNo package-manager update timestamp was available.low confidence
infoRelease/tag comparison is only available for GitHub repositories.https://nlp.ist.i.kyoto-u.ac.jp/EN/index.php?JUMAN%2B%2Bnone confidence

install metadata

Package metadata

Package key	brew:jumanpp
Version	1.02
Package manager	Homebrew
Package manager page	https://formulae.brew.sh/formula/jumanpp
Homepage	https://nlp.ist.i.kyoto-u.ac.jp/EN/index.php?JUMAN%2B%2B
Repository	https://github.com/ku-nlp/jumanpp
Upstream docs	https://github.com/ku-nlp/jumanpp#readme
License	Apache-2.0
Source archive	https://lotus.kuee.kyoto-u.ac.jp/nl-resource/jumanpp/jumanpp-1.02.tar.xz
Dependencies	gperftools
Build dependencies	boost
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	jumanpp
Version Scheme	0
Revision	0
Bottle Stable Root URL	https://ghcr.io/v2/homebrew/core
Deprecated	no
Disabled	no
Keg Only	no
URL Keys	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%

jumanpp

nix profile install nixpkgs#jumanpp

normalized package name match
Matched by: Jumanpp

nixpkgs package indexes · api.github.com · nixpkgs package indexes: pkgs/by-name/ju/jumanpp/package.nix from https://api.github.com/repos/NixOS/nixpkgs/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/jumanpp.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 jumanpp with Homebrew, Nix