High-Income Business Professionals Engage in Side Jobs for "Self-Realization" and "Main Job Performance Improvement," Not "Supplementing Living Expenses." "TEKO" Conducts Survey on Synergistic Effects of Main Job x Side Job with 121 Participants.
TEKO LLC conducted a survey on the actual state of side jobs among high-income business professionals, targeting 121 participants of its career development support platform "TEKO." The survey revealed that side jobs are pursued not for supplementing living expenses, but for self-realization and improving main job performance.
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- 📰 Published: May 11, 2026 at 19:42
- 🔍 Collected: May 11, 2026 at 11:01
- 🤖 AI Analyzed: May 11, 2026 at 11:41 (40 min after Collected)
TEKO LLC conducted a survey on the "synergistic effects of main job x side job" targeting 121 individuals with side job experience who participate in its career development support platform "TEKO." This survey revealed that 41% of respondents were business professionals with an annual main job income of 10 million yen or more, and 98% were already earning income from their side jobs. Furthermore, the self-efficacy score through side jobs averaged 4.4 out of 5 points, and 79% of respondents stated that their main job productivity "improved." Traditionally, side jobs were often perceived as a means to "supplement living expenses." However, this survey indicates that business professionals with a certain level of income and career experience are engaging in side jobs not merely for income supplementation, but for self-realization, improved self-efficacy, gaining career autonomy, and enhancing main job performance. In light of these societal trends, TEKO operates as a career development support platform that helps individuals proactively design their careers and asset formation by combining main jobs, side jobs, and investments.
■ Background of the Survey
In recent years, working styles and career options have diversified significantly. Beyond career development based on lifelong employment and seniority systems, an increasing number of business professionals are proactively designing their lives by combining転職 (job changes), side jobs, entrepreneurship, freelancing, and investments. On the other hand, side jobs still carry images such as:
"Will it negatively affect my main job?"
"Isn't it for people who are struggling financially?"
"Will it take up my time and reduce my main job performance?"
However, the reality of business professionals participating in TEKO does not necessarily align with these images. 41% of respondents have an annual main job income of 10 million yen or more, with many active business professionals in their 30s and 40s participating. 81% of respondents are in their 30s and 40s. 41% have an annual main job income of 10 million yen or more, with various occupations. They are not doing side jobs because they are struggling financially; rather, precisely because they have achieved certain results in their main jobs, they seek "power independent of the company," "experience generating income on their own," and "self-realization outside of their main job" as their next career challenges. Therefore, TEKO conducted a survey targeting 121 members to investigate the relationship between main jobs and side jobs, the impact of side jobs on main job performance, and changes in self-efficacy.
■ Key Survey Results
1. 41% of respondents have an annual main job income of 10 million yen or more.
The respondents of this survey consist of a wide range of occupations, including sales, planning/marketing, engineers, specialists, consultants, and administrative departments. Looking at main job annual income, 41% of respondents earned 10 million yen or more. The breakdown is 36% for 10 million to 15 million yen, and 5% for 15 million yen or more. This result shows that side jobs are not necessarily a means to "supplement low income," but have become an important career development tool even for business professionals who already have a certain level of income and achievements in their main jobs.
2. Side job monetization rate is 98%.
Among the 121 respondents, 119 people, or 98% of the total, were already earning 1 yen or more from their side jobs. Regarding the time spent on side jobs, 60% of people dedicated 10 hours or more per week. This indicates that many participants are not just gathering information or pursuing interests, but are actively taking action and achieving monetization.
3. Self-efficacy score averages 4.4/5.
When asked about self-efficacy through side jobs, the average score was 4.4 out of 5 points. Furthermore, approximately 90% of respondents chose a score of 4 or higher. Self-efficacy here refers to the feeling of "being able to generate income on my own," "being able to provide value outside of the company," and "being able to proactively design my own career." Income from side jobs is not just a monetary return. It suggests that the experience of earning income from the market on one's own enhances confidence and autonomy as a business professional.
4. 79% feel an improvement in main job productivity.
When asked about main job productivity after starting a side job, 79% responded that it "improved." The breakdown is 22% for "significantly improved" and 57% for "somewhat improved." Side jobs are often seen as taking away time from the main job, but this survey confirmed that, on the contrary, side jobs lead to increased time density in the main job and improved productivity.
■ Specific Changes Side Jobs Brought to Main Jobs
The most common positive change that side jobs brought to main jobs was "improved time management skills" at 65%.
■ Background of the Survey
In recent years, working styles and career options have diversified significantly. Beyond career development based on lifelong employment and seniority systems, an increasing number of business professionals are proactively designing their lives by combining転職 (job changes), side jobs, entrepreneurship, freelancing, and investments. On the other hand, side jobs still carry images such as:
"Will it negatively affect my main job?"
"Isn't it for people who are struggling financially?"
"Will it take up my time and reduce my main job performance?"
However, the reality of business professionals participating in TEKO does not necessarily align with these images. 41% of respondents have an annual main job income of 10 million yen or more, with many active business professionals in their 30s and 40s participating. 81% of respondents are in their 30s and 40s. 41% have an annual main job income of 10 million yen or more, with various occupations. They are not doing side jobs because they are struggling financially; rather, precisely because they have achieved certain results in their main jobs, they seek "power independent of the company," "experience generating income on their own," and "self-realization outside of their main job" as their next career challenges. Therefore, TEKO conducted a survey targeting 121 members to investigate the relationship between main jobs and side jobs, the impact of side jobs on main job performance, and changes in self-efficacy.
■ Key Survey Results
1. 41% of respondents have an annual main job income of 10 million yen or more.
The respondents of this survey consist of a wide range of occupations, including sales, planning/marketing, engineers, specialists, consultants, and administrative departments. Looking at main job annual income, 41% of respondents earned 10 million yen or more. The breakdown is 36% for 10 million to 15 million yen, and 5% for 15 million yen or more. This result shows that side jobs are not necessarily a means to "supplement low income," but have become an important career development tool even for business professionals who already have a certain level of income and achievements in their main jobs.
2. Side job monetization rate is 98%.
Among the 121 respondents, 119 people, or 98% of the total, were already earning 1 yen or more from their side jobs. Regarding the time spent on side jobs, 60% of people dedicated 10 hours or more per week. This indicates that many participants are not just gathering information or pursuing interests, but are actively taking action and achieving monetization.
3. Self-efficacy score averages 4.4/5.
When asked about self-efficacy through side jobs, the average score was 4.4 out of 5 points. Furthermore, approximately 90% of respondents chose a score of 4 or higher. Self-efficacy here refers to the feeling of "being able to generate income on my own," "being able to provide value outside of the company," and "being able to proactively design my own career." Income from side jobs is not just a monetary return. It suggests that the experience of earning income from the market on one's own enhances confidence and autonomy as a business professional.
4. 79% feel an improvement in main job productivity.
When asked about main job productivity after starting a side job, 79% responded that it "improved." The breakdown is 22% for "significantly improved" and 57% for "somewhat improved." Side jobs are often seen as taking away time from the main job, but this survey confirmed that, on the contrary, side jobs lead to increased time density in the main job and improved productivity.
■ Specific Changes Side Jobs Brought to Main Jobs
The most common positive change that side jobs brought to main jobs was "improved time management skills" at 65%.