diff --git a/.coderabbit.yaml b/.coderabbit.yaml
new file mode 100644
index 0000000..35ab409
--- /dev/null
+++ b/.coderabbit.yaml
@@ -0,0 +1,7 @@
+language: ja-JP
+reviews:
+  profile: chill
+  auto_review:
+    enabled: true
+chat:
+  auto_reply: true
diff --git a/.gitignore b/.gitignore
index 33d78ee..273de36 100644
--- a/.gitignore
+++ b/.gitignore
@@ -26,3 +26,7 @@ api/lib/interface
 api/env/*
 api/seeds/*
 web/prod/*
+api/docs/er-diagrams/*
+
+# SchemaSpy
+api/docs/schemaspy/
\ No newline at end of file
diff --git a/Makefile b/Makefile
index c7d2fbb..b5d3cd8 100644
--- a/Makefile
+++ b/Makefile
@@ -85,6 +85,29 @@ mac-seed:
 	sleep 15
 	docker compose -f docker-compose.mac.yml run --rm api go run /app/seeds/seeds.go
 
+.PHONY: schemaspy
+schemaspy:
+	mkdir -p api/docs/schemaspy
+	docker compose run --rm schemaspy
+	mkdir -p api/docs/er-diagrams/summary
+	find api/docs/schemaspy/diagrams -name '*.png' ! -name 'relationships.real.*' -exec cp {} api/docs/er-diagrams/ \;
+	cp api/docs/schemaspy/diagrams/summary/relationships.real.compact.png api/docs/er-diagrams/summary/
+	cp api/docs/schemaspy/diagrams/summary/relationships.real.large.png api/docs/er-diagrams/summary/
+	rm -rf api/docs/schemaspy
+	@echo "ER diagrams saved to api/docs/er-diagrams/"
+
+.PHONY: mac-schemaspy
+mac-schemaspy:
+	mkdir -p api/docs/schemaspy
+	docker compose run --rm schemaspy
+	mkdir -p api/docs/er-diagrams/summary
+	find api/docs/schemaspy/diagrams -name '*.png' ! -name 'relationships.real.*' -exec cp {} api/docs/er-diagrams/ \;
+	cp api/docs/schemaspy/diagrams/summary/relationships.real.compact.png api/docs/er-diagrams/summary/
+	cp api/docs/schemaspy/diagrams/summary/relationships.real.large.png api/docs/er-diagrams/summary/
+	rm -rf api/docs/schemaspy
+	@echo "ER diagrams saved to api/docs/er-diagrams/"
+
+
 # mobile/lib/assetsに512*512のアイコンを用意しておくこと(コマンドのファイル名も変更する)
 # リサイズ用にImageMagickをインストールする（`sudo apt-get install imagemagick` or `brew install imagemagick`）
 .PHONY: mobile-icons-init
diff --git a/README.md b/README.md
index ea0f535..80d8b4c 100644
--- a/README.md
+++ b/README.md
@@ -40,6 +40,20 @@ git submodule update --init
 ### diを編集してからうまく動かないとき
 一度コンテナをdownさせてからupし直してみてください。
 
+## SchemaSpyでDBスキーマを確認する（PostgreSQL）
+- DB初期データは `mysql/db` ディレクトリにありますが、実際のDBはPostgreSQLです。
+- 最終生成物の出力先: `api/docs/er-diagrams/`
+- 一時出力先: `api/docs/schemaspy`（処理後に削除）
+
+```fish
+# 標準（docker-compose.yml）
+make schemaspy
+
+# Mac用composeを使う場合
+make mac-schemaspy
+```
+接続先・認証情報は compose の環境変数（`SCHEMASPY_HOST`, `SCHEMASPY_DB` など）で上書きできます。
+
 ## Author
 NUTMEG（技大祭実行委員会情報局）
 mail: nutfes.info [at] gmail
diff --git a/docker-compose.mac.yml b/docker-compose.mac.yml
index 01c8f4d..ffdec50 100644
--- a/docker-compose.mac.yml
+++ b/docker-compose.mac.yml
@@ -3,7 +3,7 @@ version: "3.8"
 services:
   db:
     container_name: nutfes-seeft-db
-    image: postgres
+    image: postgres:18
     volumes:
       - ./mysql/db:/docker-entrypoint-initdb.d/ # 初期データ
       - ./my.cnf:/etc/mysql/conf.d/my.cnf
@@ -12,6 +12,11 @@ services:
       POSTGRES_USER: seeft
       POSTGRES_PASSWORD: password
       TZ: 'Asia/Tokyo'
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U $$POSTGRES_USER -d $$POSTGRES_DB"]
+      interval: 5s
+      timeout: 5s
+      retries: 10
     ports:
       - 5432:5432
 
@@ -43,3 +48,36 @@ services:
     tty: true
     depends_on: [api]
 
+  schemaspy:
+    container_name: nutfes-seeft-schemaspy
+    image: schemaspy/schemaspy:latest
+    depends_on:
+      db:
+        condition: service_healthy
+    environment:
+      SCHEMASPY_HOST: ${SCHEMASPY_HOST:-db}
+      SCHEMASPY_PORT: ${SCHEMASPY_PORT:-5432}
+      SCHEMASPY_DB: ${SCHEMASPY_DB:-seeft_db}
+      SCHEMASPY_USER: ${SCHEMASPY_USER:-seeft}
+      SCHEMASPY_PASSWORD: ${SCHEMASPY_PASSWORD:-password}
+      SCHEMASPY_SCHEMA: ${SCHEMASPY_SCHEMA:-public}
+    volumes:
+      - ./api/docs/schemaspy:/output
+    command:
+      - "-t"
+      - "pgsql"
+      - "-host"
+      - "${SCHEMASPY_HOST:-db}"
+      - "-port"
+      - "${SCHEMASPY_PORT:-5432}"
+      - "-db"
+      - "${SCHEMASPY_DB:-seeft_db}"
+      - "-u"
+      - "${SCHEMASPY_USER:-seeft}"
+      - "-p"
+      - "${SCHEMASPY_PASSWORD:-password}"
+      - "-s"
+      - "${SCHEMASPY_SCHEMA:-public}"
+      - "-o"
+      - "/output"
+
diff --git a/docker-compose.yml b/docker-compose.yml
index eb60dd3..48cbec8 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -1,9 +1,9 @@
-version: "3.8"
+
 
 services:
   db:
     container_name: nutfes-seeft-db
-    image: postgres
+    image: postgres:18
     volumes:
       - ./mysql/db:/docker-entrypoint-initdb.d/ # 初期データ
       - ./my.cnf:/etc/mysql/conf.d/my.cnf
@@ -12,6 +12,11 @@ services:
       POSTGRES_USER: seeft
       POSTGRES_PASSWORD: password
       TZ: 'Asia/Tokyo'
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U $$POSTGRES_USER -d $$POSTGRES_DB"]
+      interval: 5s
+      timeout: 5s
+      retries: 10
     ports:
       - 5432:5432
 
@@ -59,4 +64,39 @@ services:
     tty: true
     depends_on: [api]
 
+  schemaspy:
+    container_name: nutfes-seeft-schemaspy
+    image: schemaspy/schemaspy:latest
+    depends_on:
+      db:
+        condition: service_healthy
+    environment:
+      SCHEMASPY_HOST: ${SCHEMASPY_HOST:-db}
+      SCHEMASPY_PORT: ${SCHEMASPY_PORT:-5432}
+      SCHEMASPY_DB: ${SCHEMASPY_DB:-seeft_db}
+      SCHEMASPY_USER: ${SCHEMASPY_USER:-seeft}
+      SCHEMASPY_PASSWORD: ${SCHEMASPY_PASSWORD:-password}
+      SCHEMASPY_SCHEMA: ${SCHEMASPY_SCHEMA:-public}
+    volumes:
+      - ./api/docs/schemaspy:/output
+    profiles:
+      - tools
+    command:
+      - "-t"
+      - "pgsql"
+      - "-host"
+      - "${SCHEMASPY_HOST:-db}"
+      - "-port"
+      - "${SCHEMASPY_PORT:-5432}"
+      - "-db"
+      - "${SCHEMASPY_DB:-seeft_db}"
+      - "-u"
+      - "${SCHEMASPY_USER:-seeft}"
+      - "-p"
+      - "${SCHEMASPY_PASSWORD:-password}"
+      - "-s"
+      - "${SCHEMASPY_SCHEMA:-public}"
+      # - "-o"
+      # - "/output"
+