# nkf を Homebrew, apt, dnf, MacPorts, Nix, zypper でインストール

nkf のインストール経路、実行ファイル、メタデータ、AI エージェント向けセキュリティノートを確認します。

## インストール

```sh
sudo av install brew:nkf
```

追加のインストールコマンド:

### macOS

- Homebrew (100%):

```sh
brew install nkf
```

  証拠: local Homebrew formula metadata

- MacPorts (94%):

```sh
sudo port install nkf
```

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

### Linux

- Debian apt (92%):

```sh
sudo apt install nkf
```

  証拠: Debian stable package indexes: nkf from https://deb.debian.org/debian/dists/stable/main/binary-amd64/Packages.xz

- dnf (92%):

```sh
sudo dnf install nkf
```

  証拠: Fedora Rawhide package metadata: nkf from https://dl.fedoraproject.org/pub/fedora/linux/development/rawhide/Everything/x86_64/os/repodata/210a2053c8e007daf9ae39c2a21daaed9b2ddd07d63ecffa597050361e73650c-primary.xml.zst

- Nix (92%):

```sh
nix profile install nixpkgs#nkf
```

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

- zypper (92%):

```sh
sudo zypper install nkf
```

  証拠: openSUSE Tumbleweed package metadata: nkf from https://download.opensuse.org/tumbleweed/repo/oss/repodata/50b07339cb64c8ed4091bdbabddadc1ff5737b090e478818a195b40d8a3292861a879139b4a3987c31109699fde9fbf4a716367ddf4eef77da75f96e3193d6ed-primary.xml.zst

## パッケージ情報

- **パッケージキー:** brew:nkf
- **パッケージマネージャ:** Homebrew
- **パッケージマネージャページ:** <https://formulae.brew.sh/formula/nkf>
- **バージョン:** 2.1.5
- **ソース概要:** Network Kanji code conversion Filter (NKF)
- **ホームページ:** <https://github.com/nurse/nkf>
- **リポジトリ:** <https://github.com/nurse/nkf>
- **ライセンス:** Zlib
- **ソースアーカイブ:** <https://deb.debian.org/debian/pool/main/n/nkf/nkf_2.1.5.orig.tar.gz>
- **生成日時:** 2026-08-04T22:13:35+00:00

## 実行可能ファイル

- nkf (cli)
- nkf (エイリアス)

## インストール挙動

- post-install フック: 未定義
- Bottle: 利用可能 対象 arm64_linux, arm64_sequoia, arm64_sonoma, arm64_tahoe, sonoma, x86_64_linux

## バージョンと鮮度

- ページ生成日: 2026-08-04
- マネージャ版: 2.1.5
- ローカルデータ: OK
- 上流リポジトリ: https://github.com/nurse/nkf
- 情報: No package-manager update timestamp was available.
- 情報: No cached GitHub release or tag data was available.
## プロジェクトの歴史と使われ方

nkf, the Network Kanji Filter, is a long-lived Japanese text encoding conversion utility. It converts among encodings such as ISO-2022-JP, Shift_JIS, EUC-JP, UTF-8, UTF-16, and UTF-32, with automatic input-encoding guessing as one of its defining conveniences.

### プロジェクトの歴史

The upstream README credits the original 1987 Fujitsu work by Itaru Ichikawa and the nkf Project's later maintenance from 1996 through 2012. The project's change log shows a major 2.0-era transition in September 2002, including UTF-8/UTF-16 work and migration into SourceForge CVS, which matches nkf's role as Japanese Unix text processing moved from legacy encodings toward Unicode.

### 採用の歴史

nkf has survived because the Japanese encoding problem never fully disappeared: archives, mail, old web content, Windows-31J/CP932 data, and legacy build/test fixtures still need reliable conversion. Homebrew's API reported 144 installs in 30 days, 560 in 90 days, and 4,692 in 365 days when checked on July 1, 2026, and the package is also present across Debian/Ubuntu, Fedora, openSUSE, Nix, MacPorts, and other package systems.

### 使われ方

Typical command-line use is plumbing: guess an unknown Japanese file's encoding, convert Shift_JIS or EUC-JP to UTF-8, normalize line endings, MIME-decode Japanese mail headers, or do in-place conversion with `--overwrite`. Developers also encounter nkf indirectly through language bindings, notably Ruby's NKF extension.

### タイムライン

- 1987: original nkf copyright is attributed to Fujitsu Ltd. and Itaru Ichikawa.
- 1996-2012: README credits ongoing nkf Project copyright.
- 2002-09: 2.0-era notes record UTF support work and SourceForge CVS setup.
- 2018-12-15: v2.1.5 is the stable version carried by Homebrew.

### Related projects

- Ruby NKF extension
- python-nkf
- iconv

### ソース

- <https://formulae.brew.sh/api/formula/nkf.json>
- <https://github.com/nurse/nkf>
- <https://raw.githubusercontent.com/nurse/nkf/master/Changes>
- <https://raw.githubusercontent.com/nurse/nkf/master/nkf.1>
- <https://ruby-doc.org/core-3.1.2/NKF.html>


## セキュリティノート

broad file, network, media, or database tool signal.

- **Geiger リスク:** blue / 中
- broad file, network, media, or database tool signal

## ソースデータベース詳細

- **Source Database:** Homebrew formula API
- **Tap:** homebrew/core
- **Full Name:** nkf
- **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

## 他のパッケージマネージャ記録

- Debian apt - libnkf-perl - 1:2.1.5-1+b8: normalized package name match | Debian stable package indexes: libnkf-perl from https://deb.debian.org/debian/dists/stable/main/binary-amd64/Packages.xz | Network Kanji code conversion Filter for Perl | https://osdn.net/projects/nkf/
- Debian apt - nkf - 1:2.1.5-1+b8: normalized package name match | Debian stable package indexes: nkf from https://deb.debian.org/debian/dists/stable/main/binary-amd64/Packages.xz | Network Kanji code conversion Filter | https://osdn.net/projects/nkf/
- Nix - nkf: normalized package name match | nixpkgs package indexes: pkgs/by-name/nk/nkf/package.nix from https://api.github.com/repos/NixOS/nixpkgs/git/trees/master?recursive=1
- Ubuntu apt - libnkf-perl - 1:2.1.5-1build7: normalized package name match | Ubuntu 24.04 LTS package indexes: libnkf-perl from https://archive.ubuntu.com/ubuntu/dists/noble/universe/binary-amd64/Packages.gz | Network Kanji code conversion Filter for Perl | https://osdn.net/projects/nkf/
- Ubuntu apt - nkf - 1:2.1.5-1build7: normalized package name match | Ubuntu 24.04 LTS package indexes: nkf from https://archive.ubuntu.com/ubuntu/dists/noble/universe/binary-amd64/Packages.gz | Network Kanji code conversion Filter | https://osdn.net/projects/nkf/
- dnf - nkf - 2.1.4-40.fc45: normalized package name match | Fedora Rawhide package metadata: nkf from https://dl.fedoraproject.org/pub/fedora/linux/development/rawhide/Everything/x86_64/os/repodata/210a2053c8e007daf9ae39c2a21daaed9b2ddd07d63ecffa597050361e73650c-primary.xml.zst | A Kanji code conversion filter | http://nkf.osdn.jp/
- dnf - perl-NKF - 2.1.4-40.fc45: normalized package name match | Fedora Rawhide package metadata: perl-NKF from https://dl.fedoraproject.org/pub/fedora/linux/development/rawhide/Everything/x86_64/os/repodata/210a2053c8e007daf9ae39c2a21daaed9b2ddd07d63ecffa597050361e73650c-primary.xml.zst | Perl extension for Network Kanji Filter | http://nkf.osdn.jp/
- zypper - nkf - 2.1.5-1.37: normalized package name match | openSUSE Tumbleweed package metadata: nkf from https://download.opensuse.org/tumbleweed/repo/oss/repodata/50b07339cb64c8ed4091bdbabddadc1ff5737b090e478818a195b40d8a3292861a879139b4a3987c31109699fde9fbf4a716367ddf4eef77da75f96e3193d6ed-primary.xml.zst | Network Kanji Code Conversion Filter | http://sourceforge.jp/projects/nkf/
- zypper - perl-NKF - 2.1.5-1.37: normalized package name match | openSUSE Tumbleweed package metadata: perl-NKF from https://download.opensuse.org/tumbleweed/repo/oss/repodata/50b07339cb64c8ed4091bdbabddadc1ff5737b090e478818a195b40d8a3292861a879139b4a3987c31109699fde9fbf4a716367ddf4eef77da75f96e3193d6ed-primary.xml.zst | Perl extension for nkf (Network Kanji Filter) | http://sourceforge.jp/projects/nkf/
- MacPorts - nkf: normalized package name match | MacPorts ports tree: textproc/nkf/Portfile from https://api.github.com/repos/macports/macports-ports/git/trees/master?recursive=1


## 関連リンク

- [Source-control packages](https://pkg.so/ja/source-control-tools/) - Belongs to a source-control command family.
- [Secret-risk packages](https://pkg.so/ja/secret-risk-packages/) - Has protected-tool coverage, approval-gate, or non-low Geiger security signals.
- [Terminal utility packages](https://pkg.so/ja/terminal-utilities/) - Matched terminal and command-line workflow metadata.
- [Text processing packages](https://pkg.so/ja/text-processing-tools/) - Matched text, document, or structured-data processing metadata.
- [bsdconv](https://pkg.so/ja/brew/bsdconv/) - Shares pkgdb curated category or tags: character-encoding, cli, developer-tools, text-processing.
- [sd](https://pkg.so/ja/brew/sd/) - Shares pkgdb curated category or tags: cli, developer-tools, text-processing.
- [enca](https://pkg.so/ja/brew/enca/) - Shares pkgdb curated category or tags: cli, developer-tools, text-processing.
- [choose-rust](https://pkg.so/ja/brew/choose-rust/) - Shares pkgdb curated category or tags: cli, developer-tools, text-processing.
- [enscript](https://pkg.so/ja/brew/enscript/) - Shares pkgdb curated category or tags: cli, developer-tools, text-processing.
- [recode](https://pkg.so/ja/brew/recode/) - Shares pkgdb curated category or tags: character-encoding, cli, developer-tools, text-processing.
- [rpl](https://pkg.so/ja/brew/rpl/) - Shares pkgdb curated category or tags: cli, developer-tools, text-processing.
- [cmigemo](https://pkg.so/ja/brew/cmigemo/) - Shares pkgdb curated category or tags: cli, developer-tools, text-processing.
- [cconv](https://pkg.so/ja/brew/cconv/) - Local package facts share a topical domain. Shared terms: character, cli, conversion, developer, developer-tools.

## Combined YAML source

View the package source record on GitHub. [combined/nkf.yml](https://github.com/mxcl/pkgdb/blob/main/combined/nkf.yml)


## ソース

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