diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 7d7dcec..fcc8380 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -7,9 +7,23 @@ on:
     branches: ["main"]
 
 jobs:
+  create-envfile:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Make envfile
+        uses: SpicyPizza/create-envfile@v2.0
+        with:
+          envkey_REACT_APP_YUMEMI_API_URL: ${{ secrets.YUMEMI_API_URL }}
+          envkey_REACT_APP_YUMEMI_API_KEY: ${{ secrets.YUMEMI_API_KEY }}
+          directory: ./
+          file_name: .env
+          fail_on_empty: false
+          sort_keys: false
+
   build:
     name: build
     runs-on: ubuntu-latest
+    needs: create-envfile
     steps:
       - uses: actions/checkout@v3
       - name: yarn install
diff --git a/.github/workflows/deploy-ph-pages.yml b/.github/workflows/deploy-ph-pages.yml
index 42eaef9..aaa8178 100644
--- a/.github/workflows/deploy-ph-pages.yml
+++ b/.github/workflows/deploy-ph-pages.yml
@@ -22,9 +22,10 @@ jobs:
       - name: Make envfile
         uses: SpicyPizza/create-envfile@v2.0
         with:
+          envkey_REACT_APP_YUMEMI_API_URL: ${{ secrets.YUMEMI_API_URL }}
           envkey_REACT_APP_YUMEMI_API_KEY: ${{ secrets.YUMEMI_API_KEY }}
           directory: ./
-          file_name: .env.production
+          file_name: .env
           fail_on_empty: false
           sort_keys: false
 
diff --git a/.gitignore b/.gitignore
index 4d29575..8692cf6 100644
--- a/.gitignore
+++ b/.gitignore
@@ -13,6 +13,7 @@
 
 # misc
 .DS_Store
+.env
 .env.local
 .env.development.local
 .env.test.local
diff --git a/package.json b/package.json
index bcbca48..718f5c3 100644
--- a/package.json
+++ b/package.json
@@ -11,6 +11,7 @@
     "@types/node": "^16.7.13",
     "@types/react": "^18.0.0",
     "@types/react-dom": "^18.0.0",
+    "axios": "^1.7.9",
     "jest": "^29.7.0",
     "react": "^19.0.0",
     "react-dom": "^19.0.0",
@@ -47,6 +48,7 @@
     "@babel/plugin-proposal-private-property-in-object": "^7.21.11",
     "@eslint/js": "^9.16.0",
     "@testing-library/dom": "^10.4.0",
+    "dotenv": "^16.4.7",
     "eslint": "^9.16.0",
     "eslint-config-prettier": "^9.1.0",
     "eslint-config-react": "^1.1.7",
@@ -60,6 +62,9 @@
     "typescript-eslint": "^8.18.0"
   },
   "jest": {
+    "setupFiles": [
+      "dotenv/config"
+    ],
     "transform": {
       "^.+\\.tsx?$": "ts-jest"
     },
diff --git a/src/api/prefectures.ts b/src/api/prefectures.ts
new file mode 100644
index 0000000..66061b6
--- /dev/null
+++ b/src/api/prefectures.ts
@@ -0,0 +1,23 @@
+import axios from "axios";
+import { Prefecture } from "../types/prefecture";
+
+export const fetchPrefectures = async (): Promise<Prefecture[]> => {
+  try {
+    const response = await axios.get(
+      `${process.env.REACT_APP_YUMEMI_API_URL}/prefectures`,
+      {
+        headers: {
+          "X-API-KEY": process.env.REACT_APP_YUMEMI_API_KEY!,
+        },
+      }
+    );
+
+    if (response.status !== 200) {
+      throw new Error("Failed to fetch prefectures");
+    }
+
+    return response.data as Prefecture[];
+  } catch (error) {
+    throw new Error("Error fetching prefectures: " + error);
+  }
+};
diff --git a/src/tests/prefectures.test.ts b/src/tests/prefectures.test.ts
new file mode 100644
index 0000000..f7fb20a
--- /dev/null
+++ b/src/tests/prefectures.test.ts
@@ -0,0 +1,44 @@
+import axios from "axios";
+import { fetchPrefectures } from "./../api/prefectures";
+import { Prefecture } from "../types/prefecture";
+
+jest.mock("axios");
+const mockedAxios = axios as jest.Mocked<typeof axios>;
+
+describe("fetchPrefectures", () => {
+  it("正常に都道府県データを取得できる", async () => {
+    const mockData: Prefecture[] = [
+      { prefCode: 1, prefName: "北海道" },
+      { prefCode: 2, prefName: "青森県" },
+      { prefCode: 3, prefName: "宮城県" },
+    ];
+
+    mockedAxios.get.mockResolvedValue({ status: 200, data: mockData });
+
+    const result = await fetchPrefectures();
+
+    expect(result).toEqual(mockData);
+    expect(mockedAxios.get).toHaveBeenCalledWith(
+      `${process.env.REACT_APP_YUMEMI_API_URL}/prefectures`,
+      {
+        headers: {
+          "X-API-KEY": process.env.REACT_APP_YUMEMI_API_KEY!,
+        },
+      }
+    );
+  });
+
+  it("APIがエラーを返した場合、エラーをスローする", async () => {
+    mockedAxios.get.mockRejectedValue(new Error("API Error"));
+
+    await expect(fetchPrefectures()).rejects.toThrow("API Error");
+    expect(mockedAxios.get).toHaveBeenCalledWith(
+      `${process.env.REACT_APP_YUMEMI_API_URL}/prefectures`,
+      {
+        headers: {
+          "X-API-KEY": process.env.REACT_APP_YUMEMI_API_KEY!,
+        },
+      }
+    );
+  });
+});
diff --git a/src/types/prefecture.ts b/src/types/prefecture.ts
new file mode 100644
index 0000000..2778524
--- /dev/null
+++ b/src/types/prefecture.ts
@@ -0,0 +1,4 @@
+export interface Prefecture {
+  prefCode: number;
+  prefName: string;
+}
diff --git a/yarn.lock b/yarn.lock
index eb9691d..0b6ec53 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -3147,6 +3147,15 @@ axe-core@^4.10.0:
   resolved "https://registry.yarnpkg.com/axe-core/-/axe-core-4.10.2.tgz#85228e3e1d8b8532a27659b332e39b7fa0e022df"
   integrity sha512-RE3mdQ7P3FRSe7eqCWoeQ/Z9QXrtniSjp1wUjt5nRC3WIpz5rSCve6o3fsZ2aCpJtrZjSZgjwXAoTO5k4tEI0w==
 
+axios@^1.7.9:
+  version "1.7.9"
+  resolved "https://registry.yarnpkg.com/axios/-/axios-1.7.9.tgz#d7d071380c132a24accda1b2cfc1535b79ec650a"
+  integrity sha512-LhLcE7Hbiryz8oMDdDptSrWowmB4Bl6RCt6sIJKpRB4XtVf0iEgewX3au/pJqm+Py1kCASkb/FFKjxQaLtxJvw==
+  dependencies:
+    follow-redirects "^1.15.6"
+    form-data "^4.0.0"
+    proxy-from-env "^1.1.0"
+
 axobject-query@^4.1.0:
   version "4.1.0"
   resolved "https://registry.yarnpkg.com/axobject-query/-/axobject-query-4.1.0.tgz#28768c76d0e3cff21bc62a9e2d0b6ac30042a1ee"
@@ -4369,6 +4378,11 @@ dotenv@^10.0.0:
   resolved "https://registry.yarnpkg.com/dotenv/-/dotenv-10.0.0.tgz#3d4227b8fb95f81096cdd2b66653fb2c7085ba81"
   integrity sha512-rlBi9d8jpv9Sf1klPjNfFAuWDjKLwTIJJ/VxtoTwIR6hnZxcEOQCZg2oIL3MWBYw5GpUDKOEnND7LXTbIpQ03Q==
 
+dotenv@^16.4.7:
+  version "16.4.7"
+  resolved "https://registry.yarnpkg.com/dotenv/-/dotenv-16.4.7.tgz#0e20c5b82950140aa99be360a8a5f52335f53c26"
+  integrity sha512-47qPchRCykZC03FhkYAhrvwU4xDBFIj1QPqaarj6mdM/hgUzfPHcpkHJOn3mJAufFeeAxAzeGsr5X0M4k6fLZQ==
+
 dunder-proto@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/dunder-proto/-/dunder-proto-1.0.0.tgz#c2fce098b3c8f8899554905f4377b6d85dabaa80"
@@ -5242,7 +5256,7 @@ flatted@^3.2.9:
   resolved "https://registry.yarnpkg.com/flatted/-/flatted-3.3.2.tgz#adba1448a9841bec72b42c532ea23dbbedef1a27"
   integrity sha512-AiwGJM8YcNOaobumgtng+6NHuOqC3A7MixFeDafM3X9cIUM+xUXoS5Vfgf+OihAYe20fxqNM9yPBXJzRtZ/4eA==
 
-follow-redirects@^1.0.0:
+follow-redirects@^1.0.0, follow-redirects@^1.15.6:
   version "1.15.9"
   resolved "https://registry.yarnpkg.com/follow-redirects/-/follow-redirects-1.15.9.tgz#a604fa10e443bf98ca94228d9eebcc2e8a2c8ee1"
   integrity sha512-gew4GsXizNgdoRyqmyfMHyAmXsZDk6mHkSxZFCzW9gwlbtOW44CDtYavM+y+72qD/Vq2l550kMF52DT8fOLJqQ==
@@ -8708,6 +8722,11 @@ proxy-addr@~2.0.7:
     forwarded "0.2.0"
     ipaddr.js "1.9.1"
 
+proxy-from-env@^1.1.0:
+  version "1.1.0"
+  resolved "https://registry.yarnpkg.com/proxy-from-env/-/proxy-from-env-1.1.0.tgz#e102f16ca355424865755d2c9e8ea4f24d58c3e2"
+  integrity sha512-D+zkORCbA9f1tdWRK0RaCR3GPv50cMxcrz4X8k5LTSUD1Dkw47mKJEZQNunItRTkWwgtaUSo1RVFRIG9ZXiFYg==
+
 psl@^1.1.33:
   version "1.15.0"
   resolved "https://registry.yarnpkg.com/psl/-/psl-1.15.0.tgz#bdace31896f1d97cec6a79e8224898ce93d974c6"