Guide_3DS/docs/ja_JP/index.md

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title: "3DS 改造ガイド" #
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  cta_label: "Get Started"
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excerpt: "A complete guide to 3DS (and 2DS) custom firmware, <br /> from stock to boot9strap.<br />"
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作業に移る前にガイドの全てのページ(このページも含む) をしっかりと読んでください。
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## What is custom firmware?

**Custom firmware** ("CFW") is a full software modification to your 3DS, comparable to "administrator access" on a computer. It allows you to do anything that the 3DS is physically capable of doing, rather than being limited by whatever Nintendo allows you to do.

Popular uses for custom firmware include:

* Running homebrew software and games made for or ported to the Nintendo 3DS
* Bypassing the region lock, allowing you to play games from other regions
* HOME Menu customization, using community-created [themes and badges](https://themeplaza.art)
* Modification of games ("ROM hacks") through [LayeredFS](https://github.com/knight-ryu12/godmode9-layeredfs-usage/wiki/Using-Luma3DS'-layeredfs-(Only-version-8.0-and-higher))
* Save data editing, backup, and restore
* Emulation of older consoles, as well as native playback of DS and GBA games
* Installing your physical cartridges for digital use

## ごのガイドでインストールされるもの

This guide will:
+ Install **boot9strap** and **Luma3DS custom firmware** on unmodified retail 3DS/2DS consoles
    + Luma3DS will automatically remove the region lock and allow you to run unsigned software
+ Install various pieces of homebrew software, such as a package installer, save file manager, and a homebrew app store
+ Make critical system file backups that can help avoid bricks (and recover data in the event of one)

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### Continue to [Key Information](key-information)
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