Top 10 Things to Be Glad or Regretful About After Changing Jobs: Success Tips Learned from 1,000 Real Voices

When thinking about changing jobs, everyone worries, "Will I really succeed?" Tanaka (32), who works at an IT company in Tokyo, is one of them. While he finds his current job rewarding, he is dissatisfied with his salary and working style, and spends his days browsing job change sites and sighing. What occupies his mind is the question, "Will I regret changing jobs?"

In this article, based on the latest data such as Dentsu's survey of 2,000 people with job change experience (announced March 2026) and the "Things that were good to do and things I wish I had done in your first job change" survey conducted by en-tenshoku (conducted March 2026, 962 valid responses), we introduce rankings of "things that were good to do" and "things that were regretted" when changing jobs. Furthermore, we deliver specific episodes about the advance preparations that actual job changers unanimously say "I wish I had done."

By reading this article, you will gain clarity on the specific actions you can take to succeed in changing jobs and the pitfalls to avoid.

In conclusion: The most important things when changing jobs are actively applying with a "just try it" mindset (1st place in the en-tenshoku survey, 31%) and clarifying your desired conditions (2nd place). Conversely, to prevent regret, comparing and considering multiple job listings (1st place for things you wish you had done) and self-analysis (3rd place) are essential. Data also shows that using a job change agent increases satisfaction (approximately 70% were satisfied in an Adecco survey). Let's start by taking that first step.

Top 5 Things That Were "Worth Doing" When Changing Jobs: The Key to Success Is Unexpected

According to a survey by en-tenshoku (conducted in March 2026, with 962 valid responses), the number one "thing worth doing" for first-time job changers was "taking a proactive approach by just applying" (31%). This was followed by "clarifying your desired conditions" and "self-analysis" (23% each), and in third place, "using job change websites and agents" (22%).

What these results show is that the key to a successful job change lies not in "perfect preparation" but in "taking action." Unless you apply, you won't know whether a job is a good fit for you.

1st Place: Just Apply – Action Changes Everything

There are many voices saying, "Once I applied, it turned out to suit me better than I expected." The biggest hurdle in a job search is taking the first step. Rather than hesitating to apply because you think "I might not be good enough," applying first allows you to learn your market value. Even if you are rejected, the feedback from interviews can be used in your next steps.

2nd Place: Clarifying Your Desired Conditions and Self-Analysis – A Job Search with a Clear Focus

If you change jobs without clarifying "what you value most," mismatches are more likely to occur after joining a company. List the conditions you cannot compromise on, such as salary, work style, job content, and career path. By thoroughly analyzing yourself, your strengths and values become clear, allowing you to give consistent answers in interviews as well.

3rd Place: Using Job Change Websites and Agents – The Amount of Information Determines Success

People who use job change websites and agents can access more job openings and find companies that suit them more easily than those who do not. According to a survey by Adecco (conducted in February 2026, targeting 1,000 company employees nationwide), approximately 70% of people who changed jobs through a recruitment agent responded that they "would like to use a recruitment agent again next time." Agents not only introduce non-public job openings but also support interview preparation and salary negotiations, increasing the probability of a successful job change.

4th Place: Gathering Information – Company Research Directly Affects Post-Hiring Satisfaction

The fourth "thing worth doing" is "company research and information gathering." By collecting information from company websites, review sites, and social media, you can reduce the gap you might feel after joining. In particular, review sites featuring employees' real voices are valuable sources of information.

5th Place: Managing Your Job Search Schedule – Proceeding in a Planned Manner

Job hunting often takes a long time, and without a plan, you can easily become exhausted. By creating a schedule and setting weekly goals, you can maintain your motivation. Additionally, coordinating the timing of your resignation and your start date at the new company is also important.

Top 5 Things People Regret After Changing Jobs: How to Avoid Thinking "I Wish I Had Done That"

Meanwhile, the same survey found that the number one "thing people wish they had done" was "comparing and considering a large number of job listings" (36%). Second was "self-analysis" (28%), and third was "company research" (27%). These regrets tend to occur when you rush through your job search.

1st: Insufficient Comparison of Job Listings – Don't Rush

"I wish I had looked at more job listings before deciding" is the most common regret. The jobs posted on job boards are only a fraction of what's available. If you consult a recruiter, they can also introduce you to non-public positions. By comparing multiple options, you can identify the company that best suits you.

2nd: Insufficient Self-Analysis – A Job Search Without Direction

If you start your job search without doing self-analysis, you won't have a clear criterion for choosing companies, which tends to lead to mismatches. By understanding your strengths and values, your criteria for selecting companies becomes clearer.

3rd: Insufficient Company Research – Shocked by the Gap After Joining

"I wish I had done more thorough company research" is also a common regret. The gap between what you heard in the interview and the actual work environment can become a major source of stress after joining. Use review sites and informational interviews with alumni or current employees to research the actual company culture in advance.

4th: Not Using a Recruiter Enough – Don't Shoulder Everything Alone

"I wish I had used a recruiter" is another common sentiment. Recruiters support you not only with job introductions but also with resume polishing, interview preparation, and salary negotiations. Getting professional help rather than going it alone increases your chances of success.

5th: Poor Timing of Resignation – Avoid Financial Regrets

If you get the timing of your resignation wrong, you may lose out on paid leave, severance pay, or bonuses. Carefully consider your company's policies and your own situation when deciding when to resign.

Satisfaction with Using Job Change Agents: About 70% Say "I Would Use One Again"

According to a survey released by Adecco Co., Ltd. in February 2026 (targeting 1,000 company employees nationwide), among those who changed jobs through a job change agent, about 70% are satisfied with their current workplace, and about 70% answered "I would use a job change agent again next time." This data indicates that using a job change agent contributes to successful job changes.

When choosing an agent, it is important to select one that is strong in your desired industry or occupation. Additionally, by registering with multiple agents, you can access a greater number of job openings.

転職回数と信用：面接で重視される一貫性

According to a survey by 女の転職type (April 2026, targeting 789 working women), a certain number of respondents said they cannot trust people with "5 or more job changes." This survey result suggests that a high number of job changes may work against candidates in the hiring process. What employers worry about is the risk that candidates who repeatedly change jobs in a short period "won't be immediately productive" or "might quit soon." Therefore, more than the number itself, whether you can provide a convincing reason for each job change is what determines the outcome of the selection process.

However, more important than having a high number of job changes is whether there is consistency across each move. In interviews, you need to clearly convey that your career focus has not wavered and that your reasons for changing jobs are clear.

Practical Checklist for a Successful Job Change

Use the following checklist to proceed with your job search in a planned manner.

• Conduct a self-analysis and clarify your strengths and values
• List your desired conditions (salary, work location, job content, etc.)
• Register with multiple job sites and agents
• Compare and review job listings, and attend information sessions or casual interviews for companies of interest
• Thoroughly research companies (review sites, social media, alumni visits, etc.)
• Prepare for interviews (self-introduction, motivation for applying)
• Plan your resignation timing (paid leave usage, bonus periods, etc.)

Frequently Asked Questions (FAQ)

Q1: What is the biggest regret people have when changing jobs?

"Not comparing job listings enough" is the most common regret. According to a survey by en-tenshoku, it ranks first among things people wish they had done, with 36% of respondents citing it. Rather than rushing to decide on one company, it is important to compare multiple job listings and choose a company that fits you.

Q2: Should I use a recruitment agency?

Yes, it is especially recommended. According to a survey by Adecco, about 70% of people who changed jobs through an agency are satisfied with their current workplace and said they would use one again. Professional support such as introductions to non-public job openings and interview preparation increases your chances of success in changing jobs.

Q3: Will having changed jobs many times put me at a disadvantage?

It is hard to say in general, but a survey by Woman's Tenshoku Type found that a certain number of respondents said they cannot trust people who have changed jobs five or more times. What matters is whether you can clearly explain your reasons for changing jobs and the consistency of your career.

Q4: How long should I expect my job search to take?

Generally, it is said to take about three to six months, but it varies by industry and job type. It is important to plan your schedule carefully and proceed with some buffer time.

Q5: Once I receive a job offer, should I resign immediately?

Even after receiving an offer, decide your resignation timing carefully. It is important to consider the handover period, use of paid leave, and bonus timing, and aim for a smooth departure from your current company.

Q6: What are the key points to avoid failure at a new job?

It is important to thoroughly research the company before joining and to have a good understanding of the corporate culture and job content. Also, after joining, actively communicate with others, and if you feel a gap, consult with someone early.

Q7: What is the fastest route to a successful job change?

Taking proactive action—"just apply first"—is the fastest route. It ranked first in the en-tenshoku survey as well, and applying helps you understand your market value. At the same time, it is important not to neglect self-analysis and company research.

Summary: The Key to a Successful Job Change Lies in Balancing "Action" and "Preparation"

Like Mr. Tanaka, many people feel anxious about changing jobs. However, as the data shows, the key to a successful job change lies in balancing the initiative to "just apply and see" with thorough preparation such as "comparing job listings" and "self-analysis."

Changing jobs is a major turning point in life. To avoid regrets, use the rankings introduced in this article as a reference and proceed in a planned manner. And take that first step.

Risk Warning: Always verify job-change-related information from multiple sources and act at your own discretion. Changing jobs always carries risks. Especially if you are changing jobs for the first time or are unsure about your career direction, we strongly recommend using the job-change agents introduced in this article. Incorporating a professional, objective perspective can significantly reduce the risk of mismatches.

FAQ

What is the biggest regret people have about changing jobs?

The most common regret is "not comparing enough job listings." According to a survey by En転職, this was the top thing people wished they had done, cited by 36% of respondents. Rather than rushing to decide on one company, it's important to compare multiple job listings and choose an employer that suits you.

Should I use a recruitment agency?

Yes, it is especially recommended. According to a survey by Adecco, about 70% of people who changed jobs through an agency are satisfied with their current employer and said they would use the service again. Receiving professional support, such as introductions to non-public job openings and interview preparation, increases your chances of a successful job change.

Will having many job changes put me at a disadvantage?

It is hard to say in general, but a survey by 女の転職type found that a certain number of respondents said they cannot trust people who have changed jobs five or more times. What matters is whether you can clearly explain your reasons for changing jobs and the consistency of your career.

How long should I expect my job search to take?

Generally, it is said to take about three to six months, but this varies by industry and position. It is important to plan your schedule carefully and proceed with some buffer time.

Once I receive a job offer, should I resign immediately?

Even after receiving an offer, decide your resignation timing carefully. Consider the handover period, use of paid leave, and bonus timing, and aim for a smooth and amicable departure.

What are the key points to avoid failure at a new job?

Before joining, thoroughly research the company and make sure you understand its culture and the nature of the work. After joining, actively communicate with others, and if you feel a gap, consult with someone early.

What is the fastest route to a successful job change?

Taking proactive action—"just apply first"—is the fastest route. It ranked first in the En転職 survey as well, and applying helps you understand your market value. At the same time, it is important not to neglect self-analysis and company research.

Sources & Verification

This article was fact-checked on 2026-08-17. Key claims:

• "According to a Dentsu survey, 2,000 people with job-change experience were surveyed." — verified via https://www.dentsu.co.jp/news/item-cms/2026020-0325.pdf on 2026-08-17
• "According to an en-tenshoku survey, the top thing people were glad they did in their first job change was 'taking a proactive approach to applying, such as just trying out applications' (31%)." — verified via https://employment.en-japan.com/enquete/report-131/ on 2026-08-17
• "According to an en-tenshoku survey, the top thing people wished they had done was 'comparing and considering a large number of job listings' (36%)." — verified via https://employment.en-japan.com/enquete/report-131/ on 2026-08-17
• "According to an Adecco survey, approximately 70% of office workers who changed jobs through a recruitment agency responded that they would like to use a recruitment agency again next time." — verified via https://www.adeccogroup.jp/pressroom/2026/0224 on 2026-08-17
• "According to an Onna no Tenshoku type survey, the credibility of '5 or more job changes' was surveyed among 789 working women." — verified via https://note.com/woman_type/n/n5fcc8717555b on 2026-08-17