diff --git a/src/main/kotlin/dev/usbharu/hideout/domain/model/ap/Person.kt b/src/main/kotlin/dev/usbharu/hideout/domain/model/ap/Person.kt
index 5c7f1176..e7625b44 100644
--- a/src/main/kotlin/dev/usbharu/hideout/domain/model/ap/Person.kt
+++ b/src/main/kotlin/dev/usbharu/hideout/domain/model/ap/Person.kt
@@ -9,6 +9,8 @@ open class Person : Object {
     private var icon: Image? = null
     var publicKey: Key? = null
     var endpoints: Map<String, String> = emptyMap()
+    var following: String? = null
+    var followers: String? = null
 
     protected constructor() : super()
 
@@ -24,7 +26,9 @@ open class Person : Object {
         url: String?,
         icon: Image?,
         publicKey: Key?,
-        endpoints: Map<String, String> = emptyMap()
+        endpoints: Map<String, String> = emptyMap(),
+        followers: String?,
+        following: String?
     ) : super(add(type, "Person"), name, id = id) {
         this.preferredUsername = preferredUsername
         this.summary = summary
@@ -34,6 +38,8 @@ open class Person : Object {
         this.icon = icon
         this.publicKey = publicKey
         this.endpoints = endpoints
+        this.followers = followers
+        this.following = following
     }
 
     override fun equals(other: Any?): Boolean {
diff --git a/src/main/kotlin/dev/usbharu/hideout/domain/model/hideout/dto/RemoteUserCreateDto.kt b/src/main/kotlin/dev/usbharu/hideout/domain/model/hideout/dto/RemoteUserCreateDto.kt
index f36eed2a..2a6a34fb 100644
--- a/src/main/kotlin/dev/usbharu/hideout/domain/model/hideout/dto/RemoteUserCreateDto.kt
+++ b/src/main/kotlin/dev/usbharu/hideout/domain/model/hideout/dto/RemoteUserCreateDto.kt
@@ -9,4 +9,7 @@ data class RemoteUserCreateDto(
     val outbox: String,
     val url: String,
     val publicKey: String,
+    val keyId: String,
+    val followers: String?,
+    val following: String?
 )
diff --git a/src/main/kotlin/dev/usbharu/hideout/domain/model/hideout/entity/User.kt b/src/main/kotlin/dev/usbharu/hideout/domain/model/hideout/entity/User.kt
index 9a2c4e4a..2beed536 100644
--- a/src/main/kotlin/dev/usbharu/hideout/domain/model/hideout/entity/User.kt
+++ b/src/main/kotlin/dev/usbharu/hideout/domain/model/hideout/entity/User.kt
@@ -16,15 +16,17 @@ data class User private constructor(
     val url: String,
     val publicKey: String,
     val privateKey: String? = null,
-    val createdAt: Instant
+    val createdAt: Instant,
+    val keyId: String,
+    val followers: String? = null,
+    val following: String? = null
 ) {
     override fun toString(): String {
-        return "User(id=$id, name='$name', domain='$domain', screenName='$screenName', description='$description'," +
-            " password=****, inbox='$inbox', outbox='$outbox', url='$url', publicKey='$publicKey'," +
-            " privateKey=****, createdAt=$createdAt)"
+        return "User(id=$id, name='$name', domain='$domain', screenName='$screenName', description='$description', password=$password, inbox='$inbox', outbox='$outbox', url='$url', publicKey='$publicKey', privateKey=$privateKey, createdAt=$createdAt, keyId='$keyId', followers=$followers, following=$following)"
     }
 
     companion object {
+
         private val logger = LoggerFactory.getLogger(User::class.java)
 
         @Suppress("LongParameterList", "FunctionMinLength")
@@ -40,7 +42,10 @@ data class User private constructor(
             url: String,
             publicKey: String,
             privateKey: String? = null,
-            createdAt: Instant
+            createdAt: Instant,
+            keyId: String,
+            following: String? = null,
+            followers: String? = null
         ): User {
             val characterLimit = Config.configData.characterLimit
 
@@ -115,6 +120,10 @@ data class User private constructor(
                 "outbox must not exceed ${characterLimit.general.url} characters."
             }
 
+            require(keyId.isNotBlank()) {
+                "keyId must contain non-blank characters."
+            }
+
             return User(
                 id = id,
                 name = limitedName,
@@ -127,7 +136,10 @@ data class User private constructor(
                 url = url,
                 publicKey = publicKey,
                 privateKey = privateKey,
-                createdAt = createdAt
+                createdAt = createdAt,
+                keyId = keyId,
+                followers = followers,
+                following = following
             )
         }
     }
diff --git a/src/main/kotlin/dev/usbharu/hideout/query/FollowerQueryServiceImpl.kt b/src/main/kotlin/dev/usbharu/hideout/query/FollowerQueryServiceImpl.kt
index bb4f56fc..10be4068 100644
--- a/src/main/kotlin/dev/usbharu/hideout/query/FollowerQueryServiceImpl.kt
+++ b/src/main/kotlin/dev/usbharu/hideout/query/FollowerQueryServiceImpl.kt
@@ -34,7 +34,10 @@ class FollowerQueryServiceImpl : FollowerQueryService {
                 followers[Users.url],
                 followers[Users.publicKey],
                 followers[Users.privateKey],
-                followers[Users.createdAt]
+                followers[Users.createdAt],
+                followers[Users.keyId],
+                followers[Users.following],
+                followers[Users.followers]
             )
             .select { Users.id eq id }
             .map {
@@ -50,7 +53,10 @@ class FollowerQueryServiceImpl : FollowerQueryService {
                     url = it[followers[Users.url]],
                     publicKey = it[followers[Users.publicKey]],
                     privateKey = it[followers[Users.privateKey]],
-                    createdAt = Instant.ofEpochMilli(it[followers[Users.createdAt]])
+                    createdAt = Instant.ofEpochMilli(it[followers[Users.createdAt]]),
+                    keyId = it[followers[Users.keyId]],
+                    followers = it[followers[Users.followers]],
+                    following = it[followers[Users.following]]
                 )
             }
     }
@@ -79,7 +85,10 @@ class FollowerQueryServiceImpl : FollowerQueryService {
                 followers[Users.url],
                 followers[Users.publicKey],
                 followers[Users.privateKey],
-                followers[Users.createdAt]
+                followers[Users.createdAt],
+                followers[Users.keyId],
+                followers[Users.following],
+                followers[Users.followers]
             )
             .select { Users.name eq name and (Users.domain eq domain) }
             .map {
@@ -95,7 +104,10 @@ class FollowerQueryServiceImpl : FollowerQueryService {
                     url = it[followers[Users.url]],
                     publicKey = it[followers[Users.publicKey]],
                     privateKey = it[followers[Users.privateKey]],
-                    createdAt = Instant.ofEpochMilli(it[followers[Users.createdAt]])
+                    createdAt = Instant.ofEpochMilli(it[followers[Users.createdAt]]),
+                    keyId = it[followers[Users.keyId]],
+                    followers = it[followers[Users.followers]],
+                    following = it[followers[Users.following]]
                 )
             }
     }
@@ -124,7 +136,10 @@ class FollowerQueryServiceImpl : FollowerQueryService {
                 followers[Users.url],
                 followers[Users.publicKey],
                 followers[Users.privateKey],
-                followers[Users.createdAt]
+                followers[Users.createdAt],
+                followers[Users.keyId],
+                followers[Users.following],
+                followers[Users.followers]
             )
             .select { followers[Users.id] eq id }
             .map {
@@ -140,7 +155,10 @@ class FollowerQueryServiceImpl : FollowerQueryService {
                     url = it[followers[Users.url]],
                     publicKey = it[followers[Users.publicKey]],
                     privateKey = it[followers[Users.privateKey]],
-                    createdAt = Instant.ofEpochMilli(it[followers[Users.createdAt]])
+                    createdAt = Instant.ofEpochMilli(it[followers[Users.createdAt]]),
+                    keyId = it[followers[Users.keyId]],
+                    followers = it[followers[Users.followers]],
+                    following = it[followers[Users.following]]
                 )
             }
     }
@@ -169,7 +187,10 @@ class FollowerQueryServiceImpl : FollowerQueryService {
                 followers[Users.url],
                 followers[Users.publicKey],
                 followers[Users.privateKey],
-                followers[Users.createdAt]
+                followers[Users.createdAt],
+                followers[Users.keyId],
+                followers[Users.following],
+                followers[Users.followers]
             )
             .select { followers[Users.name] eq name and (followers[Users.domain] eq domain) }
             .map {
@@ -185,7 +206,10 @@ class FollowerQueryServiceImpl : FollowerQueryService {
                     url = it[followers[Users.url]],
                     publicKey = it[followers[Users.publicKey]],
                     privateKey = it[followers[Users.privateKey]],
-                    createdAt = Instant.ofEpochMilli(it[followers[Users.createdAt]])
+                    createdAt = Instant.ofEpochMilli(it[followers[Users.createdAt]]),
+                    keyId = it[followers[Users.keyId]],
+                    followers = it[followers[Users.followers]],
+                    following = it[followers[Users.following]]
                 )
             }
     }
diff --git a/src/main/kotlin/dev/usbharu/hideout/repository/UserRepositoryImpl.kt b/src/main/kotlin/dev/usbharu/hideout/repository/UserRepositoryImpl.kt
index 10fb3a2e..f8b1c7c3 100644
--- a/src/main/kotlin/dev/usbharu/hideout/repository/UserRepositoryImpl.kt
+++ b/src/main/kotlin/dev/usbharu/hideout/repository/UserRepositoryImpl.kt
@@ -89,6 +89,9 @@ object Users : Table("users") {
         length = Config.configData.characterLimit.general.privateKey
     ).nullable()
     val createdAt: Column<Long> = long("created_at")
+    val keyId = varchar("key_id", length = Config.configData.characterLimit.general.url)
+    val following = varchar("following", length = Config.configData.characterLimit.general.url).nullable()
+    val followers = varchar("followers", length = Config.configData.characterLimit.general.url).nullable()
 
     override val primaryKey: PrimaryKey = PrimaryKey(id)
 
@@ -110,7 +113,10 @@ fun ResultRow.toUser(): User {
         url = this[Users.url],
         publicKey = this[Users.publicKey],
         privateKey = this[Users.privateKey],
-        createdAt = Instant.ofEpochMilli((this[Users.createdAt]))
+        createdAt = Instant.ofEpochMilli((this[Users.createdAt])),
+        keyId = this[Users.keyId],
+        followers = this[Users.followers],
+        following = this[Users.following]
     )
 }
 
diff --git a/src/main/kotlin/dev/usbharu/hideout/service/ap/APUserService.kt b/src/main/kotlin/dev/usbharu/hideout/service/ap/APUserService.kt
index 5909d3f5..23f7b57b 100644
--- a/src/main/kotlin/dev/usbharu/hideout/service/ap/APUserService.kt
+++ b/src/main/kotlin/dev/usbharu/hideout/service/ap/APUserService.kt
@@ -64,11 +64,13 @@ class APUserServiceImpl(
             publicKey = Key(
                 type = emptyList(),
                 name = "Public Key",
-                id = "$userUrl#pubkey",
+                id = userEntity.keyId,
                 owner = userUrl,
                 publicKeyPem = userEntity.publicKey
             ),
-            endpoints = mapOf("sharedInbox" to "${applicationConfig.url}/inbox")
+            endpoints = mapOf("sharedInbox" to "${applicationConfig.url}/inbox"),
+            followers = userEntity.followers,
+            following = userEntity.following
         )
     }
 
@@ -96,11 +98,13 @@ class APUserServiceImpl(
                 publicKey = Key(
                     type = emptyList(),
                     name = "Public Key",
-                    id = "$url#pubkey",
+                    id = userEntity.keyId,
                     owner = url,
                     publicKeyPem = userEntity.publicKey
                 ),
-                endpoints = mapOf("sharedInbox" to "${applicationConfig.url}/inbox")
+                endpoints = mapOf("sharedInbox" to "${applicationConfig.url}/inbox"),
+                followers = userEntity.followers,
+                following = userEntity.following
             ) to userEntity
         } catch (ignore: FailedToGetResourcesException) {
             val person = apResourceResolveService.resolve<Person>(url, null as Long?)
@@ -118,6 +122,9 @@ class APUserServiceImpl(
                     url = url,
                     publicKey = person.publicKey?.publicKeyPem
                         ?: throw IllegalActivityPubObjectException("publicKey is null"),
+                    keyId = person.publicKey?.id ?: throw IllegalActivityPubObjectException("publicKey keyId is null"),
+                    following = person.following,
+                    followers = person.followers
                 )
             )
         }
diff --git a/src/main/kotlin/dev/usbharu/hideout/service/user/UserServiceImpl.kt b/src/main/kotlin/dev/usbharu/hideout/service/user/UserServiceImpl.kt
index 0f865526..bb349ff3 100644
--- a/src/main/kotlin/dev/usbharu/hideout/service/user/UserServiceImpl.kt
+++ b/src/main/kotlin/dev/usbharu/hideout/service/user/UserServiceImpl.kt
@@ -34,6 +34,7 @@ class UserServiceImpl(
         val nextId = userRepository.nextId()
         val hashedPassword = userAuthService.hash(user.password)
         val keyPair = userAuthService.generateKeyPair()
+        val userUrl = "${applicationConfig.url}/users/${user.name}"
         val userEntity = User.of(
             id = nextId,
             name = user.name,
@@ -41,12 +42,15 @@ class UserServiceImpl(
             screenName = user.screenName,
             description = user.description,
             password = hashedPassword,
-            inbox = "${applicationConfig.url}/users/${user.name}/inbox",
-            outbox = "${applicationConfig.url}/users/${user.name}/outbox",
-            url = "${applicationConfig.url}/users/${user.name}",
+            inbox = "$userUrl/inbox",
+            outbox = "$userUrl/outbox",
+            url = userUrl,
             publicKey = keyPair.public.toPem(),
             privateKey = keyPair.private.toPem(),
-            createdAt = Instant.now()
+            createdAt = Instant.now(),
+            following = "$userUrl/following",
+            followers = "$userUrl/followers",
+            keyId = "$userUrl#pubkey"
         )
         return userRepository.save(userEntity)
     }
@@ -63,7 +67,10 @@ class UserServiceImpl(
             outbox = user.outbox,
             url = user.url,
             publicKey = user.publicKey,
-            createdAt = Instant.now()
+            createdAt = Instant.now(),
+            followers = user.followers,
+            following = user.following,
+            keyId = user.keyId
         )
         return try {
             userRepository.save(userEntity)
diff --git a/src/test/kotlin/dev/usbharu/hideout/service/ap/APNoteServiceImplTest.kt b/src/test/kotlin/dev/usbharu/hideout/service/ap/APNoteServiceImplTest.kt
index 9d6975f7..bf3b82d5 100644
--- a/src/test/kotlin/dev/usbharu/hideout/service/ap/APNoteServiceImplTest.kt
+++ b/src/test/kotlin/dev/usbharu/hideout/service/ap/APNoteServiceImplTest.kt
@@ -48,7 +48,8 @@ class APNoteServiceImplTest {
                     "https://follower.example.com",
                     "https://follower.example.com",
                     publicKey = "",
-                    createdAt = Instant.now()
+                    createdAt = Instant.now(),
+                    keyId = "a"
                 ),
                 User.of(
                     3L,
@@ -61,7 +62,8 @@ class APNoteServiceImplTest {
                     "https://follower2.example.com",
                     "https://follower2.example.com",
                     publicKey = "",
-                    createdAt = Instant.now()
+                    createdAt = Instant.now(),
+                    keyId = "a"
                 )
             )
             val userQueryService = mock<UserQueryService> {
@@ -77,7 +79,8 @@ class APNoteServiceImplTest {
                     "https://example.com",
                     publicKey = "",
                     privateKey = "a",
-                    createdAt = Instant.now()
+                    createdAt = Instant.now(),
+                    keyId = "a"
                 )
             }
             val followerQueryService = mock<FollowerQueryService> {
diff --git a/src/test/kotlin/dev/usbharu/hideout/service/ap/APReceiveFollowServiceImplTest.kt b/src/test/kotlin/dev/usbharu/hideout/service/ap/APReceiveFollowServiceImplTest.kt
index d16fcc2e..d1d51fa7 100644
--- a/src/test/kotlin/dev/usbharu/hideout/service/ap/APReceiveFollowServiceImplTest.kt
+++ b/src/test/kotlin/dev/usbharu/hideout/service/ap/APReceiveFollowServiceImplTest.kt
@@ -102,7 +102,9 @@ class APReceiveFollowServiceImplTest {
                 id = "https://follower.example.com#main-key",
                 owner = "https://follower.example.com",
                 publicKeyPem = "BEGIN PUBLIC KEY...END PUBLIC KEY",
-            )
+            ),
+            followers = "",
+            following = ""
 
         )
         val apUserService = mock<APUserService> {
@@ -111,30 +113,32 @@ class APReceiveFollowServiceImplTest {
         val userQueryService = mock<UserQueryService> {
             onBlocking { findByUrl(eq("https://example.com")) } doReturn
                     User.of(
-                    id = 1L,
-                    name = "test",
-                    domain = "example.com",
-                    screenName = "testUser",
-                    description = "This user is test user.",
-                    inbox = "https://example.com/inbox",
-                    outbox = "https://example.com/outbox",
-                    url = "https://example.com",
-                    publicKey = "",
-                    createdAt = Instant.now()
-                )
+                        id = 1L,
+                        name = "test",
+                        domain = "example.com",
+                        screenName = "testUser",
+                        description = "This user is test user.",
+                        inbox = "https://example.com/inbox",
+                        outbox = "https://example.com/outbox",
+                        url = "https://example.com",
+                        publicKey = "",
+                        createdAt = Instant.now(),
+                        keyId = "a"
+                    )
             onBlocking { findByUrl(eq("https://follower.example.com")) } doReturn
                     User.of(
-                    id = 2L,
-                    name = "follower",
-                    domain = "follower.example.com",
-                    screenName = "followerUser",
-                    description = "This user is test follower user.",
-                    inbox = "https://follower.example.com/inbox",
-                    outbox = "https://follower.example.com/outbox",
-                    url = "https://follower.example.com",
-                    publicKey = "",
-                    createdAt = Instant.now()
-                )
+                        id = 2L,
+                        name = "follower",
+                        domain = "follower.example.com",
+                        screenName = "followerUser",
+                        description = "This user is test follower user.",
+                        inbox = "https://follower.example.com/inbox",
+                        outbox = "https://follower.example.com/outbox",
+                        url = "https://follower.example.com",
+                        publicKey = "",
+                        createdAt = Instant.now(),
+                        keyId = "a"
+                    )
         }
 
         val userService = mock<UserService> {
diff --git a/src/test/kotlin/dev/usbharu/hideout/service/ap/resource/APResourceResolveServiceImplTest.kt b/src/test/kotlin/dev/usbharu/hideout/service/ap/resource/APResourceResolveServiceImplTest.kt
index fa244184..344a07d8 100644
--- a/src/test/kotlin/dev/usbharu/hideout/service/ap/resource/APResourceResolveServiceImplTest.kt
+++ b/src/test/kotlin/dev/usbharu/hideout/service/ap/resource/APResourceResolveServiceImplTest.kt
@@ -47,7 +47,8 @@ class APResourceResolveServiceImplTest {
                 "https://follower.example.com",
                 "https://follower.example.com",
                 publicKey = "",
-                createdAt = Instant.now()
+                createdAt = Instant.now(),
+                keyId = ""
             )
         )
 
@@ -82,7 +83,8 @@ class APResourceResolveServiceImplTest {
                 "https://follower.example.com",
                 "https://follower.example.com",
                 publicKey = "",
-                createdAt = Instant.now()
+                createdAt = Instant.now(),
+                keyId = ""
             )
         )
 
@@ -120,7 +122,8 @@ class APResourceResolveServiceImplTest {
                 "https://follower.example.com",
                 "https://follower.example.com",
                 publicKey = "",
-                createdAt = Instant.now()
+                createdAt = Instant.now(),
+                keyId = ""
             )
         )
 
@@ -169,7 +172,8 @@ class APResourceResolveServiceImplTest {
                 "https://follower.example.com",
                 "https://follower.example.com",
                 publicKey = "",
-                createdAt = Instant.now()
+                createdAt = Instant.now(),
+                keyId = ""
             )
         )
 
diff --git a/src/test/kotlin/dev/usbharu/hideout/service/user/UserServiceTest.kt b/src/test/kotlin/dev/usbharu/hideout/service/user/UserServiceTest.kt
index 650fd81c..26e4ebf8 100644
--- a/src/test/kotlin/dev/usbharu/hideout/service/user/UserServiceTest.kt
+++ b/src/test/kotlin/dev/usbharu/hideout/service/user/UserServiceTest.kt
@@ -58,14 +58,17 @@ class UserServiceTest {
         }
         val userService = UserServiceImpl(userRepository, mock(), mock(), mock(), mock(), testApplicationConfig)
         val user = RemoteUserCreateDto(
-            "test",
-            "example.com",
-            "testUser",
-            "test user",
-            "https://example.com/inbox",
-            "https://example.com/outbox",
-            "https://example.com",
-            "-----BEGIN PUBLIC KEY-----...-----END PUBLIC KEY-----"
+            name = "test",
+            domain = "example.com",
+            screenName = "testUser",
+            description = "test user",
+            inbox = "https://example.com/inbox",
+            outbox = "https://example.com/outbox",
+            url = "https://example.com",
+            publicKey = "-----BEGIN PUBLIC KEY-----...-----END PUBLIC KEY-----",
+            keyId = "a",
+            following = "",
+            followers = ""
         )
         userService.createRemoteUser(user)
         verify(userRepository, times(1)).save(any())