diff --git a/.envrc b/.envrc
deleted file mode 100644
index 1abd480..0000000
--- a/.envrc
+++ /dev/null
@@ -1,3 +0,0 @@
-watch_file nix/devshell.nix
-
-use flake
diff --git a/.gitignore b/.gitignore
index 668095b..a547bf3 100644
--- a/.gitignore
+++ b/.gitignore
@@ -22,5 +22,3 @@ dist-ssr
 *.njsproj
 *.sln
 *.sw?
-
-.direnv
diff --git a/README.md b/README.md
index 8c2d760..cca8384 100644
--- a/README.md
+++ b/README.md
@@ -1,73 +1,42 @@
-# React + TypeScript + Vite
+# Space Simulator
 
-This template provides a minimal setup to get React working in Vite with HMR and some ESLint rules.
+## 前提条件
 
-Currently, two official plugins are available:
+[mise](https://mise.jdx.dev/getting-started.html) をインストールしてください。
 
-- [@vitejs/plugin-react](https://github.com/vitejs/vite-plugin-react/blob/main/packages/plugin-react) uses [Babel](https://babeljs.io/) (or [oxc](https://oxc.rs) when used in [rolldown-vite](https://vite.dev/guide/rolldown)) for Fast Refresh
-- [@vitejs/plugin-react-swc](https://github.com/vitejs/vite-plugin-react/blob/main/packages/plugin-react-swc) uses [SWC](https://swc.rs/) for Fast Refresh
+```sh
+curl https://mise.run | sh
 
-## React Compiler
-
-The React Compiler is not enabled on this template because of its impact on dev & build performances. To add it, see [this documentation](https://react.dev/learn/react-compiler/installation).
+echo 'eval "$(~/.local/bin/mise activate bash)"' >> ~/.bashrc # bash
+echo 'eval "$(~/.local/bin/mise activate zsh)"' >> ~/.zshrc # zsh
+echo '~/.local/bin/mise activate fish | source' >> ~/.config/fish/config.fish # fish
+```
 
-## Expanding the ESLint configuration
+設定後、シェルを再起動してください。
 
-If you are developing a production application, we recommend updating the configuration to enable type-aware lint rules:
+## セットアップ
 
-```js
-export default defineConfig([
-  globalIgnores(["dist"]),
-  {
-    files: ["**/*.{ts,tsx}"],
-    extends: [
-      // Other configs...
+```sh
+mise trust
+mise install # install command line tools
+npm install
+```
 
-      // Remove tseslint.configs.recommended and replace with this
-      tseslint.configs.recommendedTypeChecked,
-      // Alternatively, use this for stricter rules
-      tseslint.configs.strictTypeChecked,
-      // Optionally, add this for stylistic rules
-      tseslint.configs.stylisticTypeChecked,
+## 開発
 
-      // Other configs...
-    ],
-    languageOptions: {
-      parserOptions: {
-        project: ["./tsconfig.node.json", "./tsconfig.app.json"],
-        tsconfigRootDir: import.meta.dirname,
-      },
-      // other options...
-    },
-  },
-]);
+```sh
+npm run dev
 ```
 
-You can also install [eslint-plugin-react-x](https://github.com/Rel1cx/eslint-react/tree/main/packages/plugins/eslint-plugin-react-x) and [eslint-plugin-react-dom](https://github.com/Rel1cx/eslint-react/tree/main/packages/plugins/eslint-plugin-react-dom) for React-specific lint rules:
+## コマンド集
+
+### Mise
 
-```js
-// eslint.config.js
-import reactX from "eslint-plugin-react-x";
-import reactDom from "eslint-plugin-react-dom";
+```sh
+mise use node@25 # add a program with a version
+mise install # install all progarms listed in mise.toml with version in mise.lock
 
-export default defineConfig([
-  globalIgnores(["dist"]),
-  {
-    files: ["**/*.{ts,tsx}"],
-    extends: [
-      // Other configs...
-      // Enable lint rules for React
-      reactX.configs["recommended-typescript"],
-      // Enable lint rules for React DOM
-      reactDom.configs.recommended,
-    ],
-    languageOptions: {
-      parserOptions: {
-        project: ["./tsconfig.node.json", "./tsconfig.app.json"],
-        tsconfigRootDir: import.meta.dirname,
-      },
-      // other options...
-    },
-  },
-]);
+# https://mise.jdx.dev/dev-tools/mise-lock.html
+mise upgrade # upgrade packages
+mise lock # generate lockfile
 ```
diff --git a/flake.lock b/flake.lock
deleted file mode 100644
index 28ab3b0..0000000
--- a/flake.lock
+++ /dev/null
@@ -1,61 +0,0 @@
-{
-  "nodes": {
-    "flake-utils": {
-      "inputs": {
-        "systems": "systems"
-      },
-      "locked": {
-        "lastModified": 1731533236,
-        "narHash": "sha256-l0KFg5HjrsfsO/JpG+r7fRrqm12kzFHyUHqHCVpMMbI=",
-        "owner": "numtide",
-        "repo": "flake-utils",
-        "rev": "11707dc2f618dd54ca8739b309ec4fc024de578b",
-        "type": "github"
-      },
-      "original": {
-        "owner": "numtide",
-        "repo": "flake-utils",
-        "type": "github"
-      }
-    },
-    "nixpkgs": {
-      "locked": {
-        "lastModified": 1768127708,
-        "narHash": "sha256-1Sm77VfZh3mU0F5OqKABNLWxOuDeHIlcFjsXeeiPazs=",
-        "owner": "NixOS",
-        "repo": "nixpkgs",
-        "rev": "ffbc9f8cbaacfb331b6017d5a5abb21a492c9a38",
-        "type": "github"
-      },
-      "original": {
-        "owner": "NixOS",
-        "ref": "nixos-unstable",
-        "repo": "nixpkgs",
-        "type": "github"
-      }
-    },
-    "root": {
-      "inputs": {
-        "flake-utils": "flake-utils",
-        "nixpkgs": "nixpkgs"
-      }
-    },
-    "systems": {
-      "locked": {
-        "lastModified": 1681028828,
-        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
-        "owner": "nix-systems",
-        "repo": "default",
-        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
-        "type": "github"
-      },
-      "original": {
-        "owner": "nix-systems",
-        "repo": "default",
-        "type": "github"
-      }
-    }
-  },
-  "root": "root",
-  "version": 7
-}
diff --git a/flake.nix b/flake.nix
deleted file mode 100644
index 75e3ca0..0000000
--- a/flake.nix
+++ /dev/null
@@ -1,19 +0,0 @@
-{
-  description = "Simple flake with a devshell";
-
-  inputs = {
-    nixpkgs.url = "github:NixOS/nixpkgs?ref=nixos-unstable";
-    flake-utils.url = "github:numtide/flake-utils";
-  };
-
-  outputs =
-    { self, nixpkgs, flake-utils }:
-    flake-utils.lib.eachDefaultSystem (system:
-    let
-      pkgs = nixpkgs.legacyPackages.${system};
-    in
-    {
-      devShells.default = import ./nix/devshell.nix { inherit pkgs; };
-      formatter = pkgs.nixpkgs-fmt;
-    });
-}
diff --git a/mise.lock b/mise.lock
new file mode 100644
index 0000000..25ef9c9
--- /dev/null
+++ b/mise.lock
@@ -0,0 +1,8 @@
+[[tools.node]]
+version = "25.6.1"
+backend = "core:node"
+"platforms.linux-arm64" = { checksum = "sha256:90fea701897ecb424aafa2824539476598437ad9f21e649732a85cc2d955d845", url = "https://nodejs.org/dist/v25.6.1/node-v25.6.1-linux-arm64.tar.gz"}
+"platforms.linux-x64" = { checksum = "sha256:3809fdbfd54829bad363b9db8e96ca3600509e2ff20ede74181cfc1ca8451ce3", url = "https://nodejs.org/dist/v25.6.1/node-v25.6.1-linux-x64.tar.gz"}
+"platforms.macos-arm64" = { checksum = "sha256:a80cb252d170a4730f78f5950cf19a46106f156e5886e5c1cc8c5602aea60243", url = "https://nodejs.org/dist/v25.6.1/node-v25.6.1-darwin-arm64.tar.gz"}
+"platforms.macos-x64" = { checksum = "sha256:3b68f847d9d8861c7c8bfef32c540d14f6ca18bfcbf5f6495a595b9529063a9b", url = "https://nodejs.org/dist/v25.6.1/node-v25.6.1-darwin-x64.tar.gz"}
+"platforms.windows-x64" = { checksum = "sha256:0ae2300cdf44c399b5b351edbefb3534d1342a6fabd64302ca8c8e2fb86b0445", url = "https://nodejs.org/dist/v25.6.1/node-v25.6.1-win-x64.zip"}
diff --git a/mise.toml b/mise.toml
new file mode 100644
index 0000000..66d3450
--- /dev/null
+++ b/mise.toml
@@ -0,0 +1,5 @@
+[tools]
+node = "25"
+
+[settings]
+lockfile = true
diff --git a/nix/devshell.nix b/nix/devshell.nix
deleted file mode 100644
index f37dd41..0000000
--- a/nix/devshell.nix
+++ /dev/null
@@ -1,6 +0,0 @@
-{ pkgs }:
-pkgs.mkShell {
-  packages = with pkgs; [
-    nodejs_25
-  ];
-}