diff --git a/sidebars.js b/sidebars.js
index ba83532e..f7d13aca 100644
--- a/sidebars.js
+++ b/sidebars.js
@@ -440,6 +440,11 @@ const sidebars = {
               label: 'SQL Interface',
               collapsible: true,
               items: [
+                {
+                  type: 'doc',
+                  id: 'scalardb-sql/index',
+                  label: 'Overview',
+                },
                 {
                   type: 'doc',
                   id: 'scalardb-sql/jdbc-guide',
@@ -472,6 +477,11 @@ const sidebars = {
               label: 'GraphQL Interface',
               collapsible: true,
               items: [
+                {
+                  type: 'doc',
+                  id: 'scalardb-graphql/index',
+                  label: 'Overview',
+                },
                 {
                   type: 'doc',
                   id: 'scalardb-graphql/how-to-run-two-phase-commit-transaction',
@@ -1356,6 +1366,11 @@ const sidebars = {
               label: 'SQL インターフェース',
               collapsible: true,
               items: [
+                {
+                  type: 'doc',
+                  id: 'scalardb-sql/index',
+                  label: '概要',
+                },
                 {
                   type: 'doc',
                   id: 'scalardb-sql/jdbc-guide',
@@ -1388,6 +1403,11 @@ const sidebars = {
               label: 'GraphQL インターフェース',
               collapsible: true,
               items: [
+                {
+                  type: 'doc',
+                  id: 'scalardb-graphql/index',
+                  label: '概要',
+                },
                 {
                   type: 'doc',
                   id: 'scalardb-graphql/how-to-run-two-phase-commit-transaction',
diff --git a/versioned_sidebars/version-3.13-sidebars.json b/versioned_sidebars/version-3.13-sidebars.json
index 4fd18f6e..28536fb8 100644
--- a/versioned_sidebars/version-3.13-sidebars.json
+++ b/versioned_sidebars/version-3.13-sidebars.json
@@ -375,6 +375,11 @@
               "label": "SQL Interface",
               "collapsible": true,
               "items": [
+                {
+                  "type": "doc",
+                  "id": "scalardb-sql/index",
+                  "label": "Overview"
+                },
                 {
                   "type": "doc",
                   "id": "scalardb-sql/jdbc-guide",
@@ -407,6 +412,11 @@
               "label": "GraphQL Interface",
               "collapsible": true,
               "items": [
+                {
+                  "type": "doc",
+                  "id": "scalardb-graphql/index",
+                  "label": "Overview"
+                },
                 {
                   "type": "doc",
                   "id": "scalardb-graphql/how-to-run-two-phase-commit-transaction",
@@ -1233,6 +1243,11 @@
               "label": "SQL インターフェース",
               "collapsible": true,
               "items": [
+                {
+                  "type": "doc",
+                  "id": "scalardb-sql/index",
+                  "label": "概要"
+                },
                 {
                   "type": "doc",
                   "id": "scalardb-sql/jdbc-guide",
@@ -1265,6 +1280,11 @@
               "label": "GraphQL インターフェース",
               "collapsible": true,
               "items": [
+                {
+                  "type": "doc",
+                  "id": "scalardb-graphql/index",
+                  "label": "概要"
+                },
                 {
                   "type": "doc",
                   "id": "scalardb-graphql/how-to-run-two-phase-commit-transaction",
diff --git a/versioned_sidebars/version-3.14-sidebars.json b/versioned_sidebars/version-3.14-sidebars.json
index 2c6a8ee0..1f4377e8 100644
--- a/versioned_sidebars/version-3.14-sidebars.json
+++ b/versioned_sidebars/version-3.14-sidebars.json
@@ -227,6 +227,16 @@
                   "id": "scalardb-cluster/scalardb-auth-with-sql",
                   "label": "Authenticate and Authorize Users by Using SQL"
                 },
+                {
+                  "type": "doc",
+                  "id": "scalardb-cluster/encrypt-data-at-rest",
+                  "label": "Encrypt Data at Rest"
+                },
+                {
+                  "type": "doc",
+                  "id": "scalardb-cluster/encrypt-wire-communications",
+                  "label": "Encrypt Wire Communications"
+                },
                 {
                   "type": "doc",
                   "id": "scalardb-benchmarks/README",
@@ -380,21 +390,16 @@
               "id": "scalardb-cluster/scalardb-cluster-grpc-api-guide",
               "label": "ScalarDB Cluster gRPC API Guide"
             },
-            {
-              "type": "doc",
-              "id": "scalardb-cluster/encrypt-data-at-rest",
-              "label": "Encrypt Data at Rest"
-            },
-            {
-              "type": "doc",
-              "id": "scalardb-cluster/encrypt-wire-communications",
-              "label": "Encrypt Wire Communications"
-            },
             {
               "type": "category",
               "label": "SQL Interface",
               "collapsible": true,
               "items": [
+                {
+                  "type": "doc",
+                  "id": "scalardb-sql/index",
+                  "label": "Overview"
+                },
                 {
                   "type": "doc",
                   "id": "scalardb-sql/jdbc-guide",
@@ -427,6 +432,11 @@
               "label": "GraphQL Interface",
               "collapsible": true,
               "items": [
+                {
+                  "type": "doc",
+                  "id": "scalardb-graphql/index",
+                  "label": "Overview"
+                },
                 {
                   "type": "doc",
                   "id": "scalardb-graphql/how-to-run-two-phase-commit-transaction",
@@ -1099,6 +1109,16 @@
                   "id": "scalardb-cluster/scalardb-auth-with-sql",
                   "label": "SQL を使用してユーザーを認証および承認"
                 },
+                {
+                  "type": "doc",
+                  "id": "scalardb-cluster/encrypt-data-at-rest",
+                  "label": "保存データを暗号化"
+                },
+                {
+                  "type": "doc",
+                  "id": "scalardb-cluster/encrypt-wire-communications",
+                  "label": "ワイヤ通信を暗号化"
+                },
                 {
                   "type": "doc",
                   "id": "scalardb-benchmarks/README",
@@ -1252,21 +1272,16 @@
               "id": "scalardb-cluster/scalardb-cluster-grpc-api-guide",
               "label": "ScalarDB Cluster gRPC API ガイド"
             },
-            {
-              "type": "doc",
-              "id": "scalardb-cluster/encrypt-data-at-rest",
-              "label": "保存データを暗号化"
-            },
-            {
-              "type": "doc",
-              "id": "scalardb-cluster/encrypt-wire-communications",
-              "label": "ワイヤ通信を暗号化"
-            },
             {
               "type": "category",
               "label": "SQL インターフェース",
               "collapsible": true,
               "items": [
+                {
+                  "type": "doc",
+                  "id": "scalardb-sql/index",
+                  "label": "概要"
+                },
                 {
                   "type": "doc",
                   "id": "scalardb-sql/jdbc-guide",
@@ -1299,6 +1314,11 @@
               "label": "GraphQL インターフェース",
               "collapsible": true,
               "items": [
+                {
+                  "type": "doc",
+                  "id": "scalardb-graphql/index",
+                  "label": "概要"
+                },
                 {
                   "type": "doc",
                   "id": "scalardb-graphql/how-to-run-two-phase-commit-transaction",