diff --git a/dictation_server/src/common/test/utility.ts b/dictation_server/src/common/test/utility.ts
index d784663..2d531a4 100644
--- a/dictation_server/src/common/test/utility.ts
+++ b/dictation_server/src/common/test/utility.ts
@@ -454,7 +454,6 @@ export const createJobNumber = async (
   });
 };
 
-
 // job_numberテーブルのレコードを更新する
 export const updateJobNumber = async (
   datasource: DataSource,
diff --git a/dictation_server/src/constants/index.ts b/dictation_server/src/constants/index.ts
index 6478a26..c91dd23 100644
--- a/dictation_server/src/constants/index.ts
+++ b/dictation_server/src/constants/index.ts
@@ -339,3 +339,16 @@ export const STORAGE_SIZE_PER_LICENSE = 5;
  * @const {number}
  */
 export const STORAGE_WARNING_THRESHOLD_PERCENT = 80;
+
+/**
+ * JobNumberの初期値
+ * @const {string}
+ */
+export const INITIAL_JOB_NUMBER = '00000000';
+
+
+/**
+ * JobNumberの最大値
+ * @const {string}
+ */
+export const MAX_JOB_NUMBER = '99999999';
diff --git a/dictation_server/src/features/accounts/accounts.service.spec.ts b/dictation_server/src/features/accounts/accounts.service.spec.ts
index dcad6ac..1dc617b 100644
--- a/dictation_server/src/features/accounts/accounts.service.spec.ts
+++ b/dictation_server/src/features/accounts/accounts.service.spec.ts
@@ -49,6 +49,7 @@ import { AccountsService } from './accounts.service';
 import { Context, makeContext } from '../../common/log';
 import {
   ADB2C_SIGN_IN_TYPE,
+  INITIAL_JOB_NUMBER,
   LICENSE_ALLOCATED_STATUS,
   LICENSE_ISSUE_STATUS,
   LICENSE_TYPE,
@@ -223,6 +224,16 @@ describe('createAccount', () => {
     expect(user?.account_id).toBe(accountId);
     expect(user?.role).toBe(role);
 
+    // jobNumberの初期値が正しく設定されているか確認
+    const jobNumber = await getJobNumber(source, accountId);
+    expect(jobNumber?.job_number).toBe(INITIAL_JOB_NUMBER);
+
+    // sortCriteriaが正しく設定されているか確認
+    const sortCriteria = await getSortCriteria(source, user?.id ?? 0);
+    expect(sortCriteria?.user_id).toBe(user?.id);
+    expect(sortCriteria?.direction).toBe('ASC');
+    expect(sortCriteria?.parameter).toBe('JOB_NUMBER');
+
     // 想定通りのメールが送られているか確認
     expect(_subject).toBe('User Registration Notification [U-102]');
     expect(
@@ -878,7 +889,26 @@ describe('createPartnerAccount', () => {
       },
     });
 
-    overrideSendgridService(service, {});
+    let _subject = '';
+    let _url: string | undefined = '';
+    overrideSendgridService(service, {
+      sendMail: async (
+        context: Context,
+        to: string[],
+        cc: string[],
+        from: string,
+        subject: string,
+        text: string,
+        html: string,
+      ) => {
+        const urlPattern = /https?:\/\/[^\s]+/g;
+        const urls = text.match(urlPattern);
+        const url = urls?.pop();
+
+        _subject = subject;
+        _url = url;
+      },
+    });
 
     overrideBlobstorageService(service, {
       createContainer: async () => {
@@ -918,6 +948,19 @@ describe('createPartnerAccount', () => {
       expect(createdAccount?.tier).toBe(2);
       expect(createdAccount?.primary_admin_user_id).toBe(createdUser?.id);
       expect(createdAccount?.secondary_admin_user_id).toBe(null);
+      const sortCriteria = await getSortCriteria(source, createdUser?.id ?? 0);
+      expect(sortCriteria).not.toBeNull();
+      expect(sortCriteria?.user_id).toBe(createdUser?.id);
+      expect(sortCriteria?.direction).toBe('ASC');
+      expect(sortCriteria?.parameter).toBe('JOB_NUMBER');
+      const jobNumber = await getJobNumber(source, accountId);
+      expect(jobNumber?.job_number).toBe(INITIAL_JOB_NUMBER);
+
+      // 想定通りのメールが送られているか確認
+      expect(_subject).toBe('User Registration Notification [U-114]');
+      expect(
+        _url?.startsWith('http://localhost:8081/mail-confirm/user?verify='),
+      ).toBeTruthy();
     }
   });
 
@@ -1308,6 +1351,10 @@ describe('createPartnerAccount', () => {
       expect(users.length).toBe(2);
       expect(users[0].external_id).toBe(parentExternalId);
       expect(users[1].external_id).toBe(partnerExternalId);
+      const sortCriteria = await getSortCriteriaList(source);
+      expect(sortCriteria.length).toBe(2);
+      const jobNumber = await getJobNumber(source, accounts[1].id);
+      expect(jobNumber?.job_number).toBe(INITIAL_JOB_NUMBER);
       // ADB2Cユーザー削除メソッドが呼ばれているか確認
       expect(b2cService.deleteUser).toBeCalledWith(partnerExternalId, context);
     }
@@ -1487,6 +1534,10 @@ describe('createPartnerAccount', () => {
       expect(users.length).toBe(2);
       expect(users[0].external_id).toBe(parentExternalId);
       expect(users[1].external_id).toBe(partnerExternalId);
+      const sortCriteria = await getSortCriteriaList(source);
+      expect(sortCriteria.length).toBe(2);
+      const jobNumber = await getJobNumber(source, accounts[1].id);
+      expect(jobNumber?.job_number).toBe(INITIAL_JOB_NUMBER);
       // ADB2Cユーザー削除メソッドが呼ばれているか確認
       expect(b2cService.deleteUser).toBeCalledWith(partnerExternalId, context);
       // コンテナ削除メソッドが呼ばれているか確認
diff --git a/dictation_server/src/repositories/accounts/accounts.repository.service.ts b/dictation_server/src/repositories/accounts/accounts.repository.service.ts
index ecd571f..06ea6ef 100644
--- a/dictation_server/src/repositories/accounts/accounts.repository.service.ts
+++ b/dictation_server/src/repositories/accounts/accounts.repository.service.ts
@@ -26,6 +26,7 @@ import {
   getTaskListSortableAttribute,
 } from '../../common/types/sort/util';
 import {
+  INITIAL_JOB_NUMBER,
   LICENSE_ALLOCATED_STATUS,
   LICENSE_EXPIRATION_THRESHOLD_DAYS,
   LICENSE_ISSUE_STATUS,
@@ -210,6 +211,20 @@ export class AccountsRepositoryService {
         throw new Error(`invalid update. result.affected=${result.affected}`);
       }
 
+      // job_numberの初期値を設定
+      const jobNumberRepo = entityManager.getRepository(JobNumber);
+      const initialJobNumber = jobNumberRepo.create({
+        account_id: persistedAccount.id,
+        job_number: INITIAL_JOB_NUMBER,
+      });
+      await insertEntity(
+        JobNumber,
+        jobNumberRepo,
+        initialJobNumber,
+        this.isCommentOut,
+        context,
+      );
+
       // ユーザーのタスクソート条件を作成
       const sortCriteria = new SortCriteria();
       {
@@ -245,6 +260,14 @@ export class AccountsRepositoryService {
       const accountsRepo = entityManager.getRepository(Account);
       const usersRepo = entityManager.getRepository(User);
       const sortCriteriaRepo = entityManager.getRepository(SortCriteria);
+      const jobNumberRepo = entityManager.getRepository(JobNumber);
+      // JobNumberを削除
+      await deleteEntity(
+        jobNumberRepo,
+        { account_id: accountId },
+        this.isCommentOut,
+        context,
+      );
       // ソート条件を削除
       await deleteEntity(
         sortCriteriaRepo,
diff --git a/dictation_server/src/repositories/tasks/tasks.repository.service.ts b/dictation_server/src/repositories/tasks/tasks.repository.service.ts
index 1e30896..aef734f 100644
--- a/dictation_server/src/repositories/tasks/tasks.repository.service.ts
+++ b/dictation_server/src/repositories/tasks/tasks.repository.service.ts
@@ -12,6 +12,7 @@ import {
 import { Task } from './entity/task.entity';
 import {
   ADMIN_ROLES,
+  MAX_JOB_NUMBER,
   NODE_ENV_TEST,
   TASK_STATUS,
   USER_ROLES,
@@ -921,7 +922,7 @@ export class TasksRepositoryService {
         }
 
         let newJobNumber: string = '';
-        if (currentJobNumberData.job_number === '99999999') {
+        if (currentJobNumberData.job_number === MAX_JOB_NUMBER) {
           // 末尾なら00000001に戻る
           newJobNumber = '00000001';
         } else {