[Original Research] Balancing Efficiency and Satisfaction with 'Subject Line Creation Within 10 Minutes' [Combeez Inc.]
Key facts
- [Original Research] Balancing Efficiency and Satisfaction with 'Subject Line Creation Within 10 Minutes' [Combeez Inc.]
- An original survey conducted by Combeez Inc. in May 2026 found that 60% of email newsletter managers complete subject line creation within 10 minutes, and that spending more time does not necessarily lead to higher open rate satisfaction. The company has released AI prompts for efficient email marketing operations.
- Source: PR Times
- Date: June 9, 2026
Direct answer
An original survey conducted by Combeez Inc. in May 2026 found that 60% of email newsletter managers complete subject line creation within 10 minutes, and that spending more time does not necessarily lead to higher open rate satisfaction. The company has released AI prompts for efficient email marketing operations.
- Citation
- [Original Research] Balancing Efficiency and Satisfaction with 'Subject Line Creation Within 10 Minutes' [Combeez Inc.] (June 9, 2026), PR Times
- Source
- PR Times
- Date
- June 9, 2026
An original survey conducted by Combeez Inc. in May 2026 found that 60% of email newsletter managers complete subject line creation within 10 minutes, and that spending more time does not necessarily lead to higher open rate satisfaction. The company has released AI prompts for efficient email marketing operations.
📋 Article Processing Timeline
- 📰 Published: June 9, 2026 at 10:00
- 🔍 Collected: June 9, 2026 at 10:29 (29 min after Published)
- 🤖 AI Analyzed: June 9, 2026 at 18:30 (8h 1m after Collected)
Combeez Inc. (Headquarters: Shibuya-ku, Tokyo; Representative Director: Yuichiro Yamazaki) conducted an original survey on email newsletter operations in May 2026.
This survey examined how much time is spent on creating email newsletter titles (subject lines).
Survey Results
When asked, 'How much time do you spend, at most, on deciding an email newsletter title (subject line)?', 60% of respondents answered that they complete it within 10 minutes, including those who take less than 1 minute.
On the other hand, approximately 40% of respondents spend 10 minutes or more on deciding the subject line.
Furthermore, a cross-analysis comparing the time spent on subject line creation with satisfaction regarding the open rate after distribution showed that approximately 70% of the group that created subject lines within 10 minutes were satisfied, compared to 57% of the group that spent 10 minutes or more. This suggests that spending more time on the subject line does not necessarily lead to higher satisfaction with the open rate.
What the Survey Results Indicate
While the email subject line is an important factor affecting the open rate, thinking about it for a long time does not always lead to better results.
Rather, it is considered important to build a system that allows for the creation of subject lines of a certain quality in a short time, utilizing past performance data, templates, and reader trends.
Combeez Inc. will continue to survey the actual conditions of email newsletter operators and disseminate information useful for efficient email marketing operations.
Survey Overview
Survey Target: Personnel involved in email newsletter operations
Survey Period: May 4, 2026 - May 29, 2026
Number of Respondents: 50 people
Survey Content: Time spent on creating email subject lines and satisfaction with open rates
Result: 60% of respondents create subject lines within 10 minutes. There is a tendency that spending more time does not necessarily increase satisfaction.
*This is an original survey and does not guarantee that the same trends apply to all email newsletter operations.
Combeez's Whitepaper
The company is characterized by content creation that leverages unique ideas, and conducts daily research on marketing and promotion.
Here are the practical email distribution efficiency prompts they have independently researched and created.
▼ 6 AI Prompts to Make Email Newsletter Creation 10 Times Easier ▼
https://x.gd/tlFkZ
▼ AI Prompts to Instantly Create Step Emails for B2B Products ▼
https://x.gd/FKsYn
Company Information
Company Name: Combeez Inc.
Location: Shibuya Scramble Square, 2-24-12 Shibuya, Shibuya-ku, Tokyo 150-6145
Representative Director: Yuichiro Yamazaki
Established: 2002
Business: Sales of email delivery tools 'Combeez Mail', 'Combeez Mail Plus', and 'Combeez Mail Light'
This survey examined how much time is spent on creating email newsletter titles (subject lines).
Survey Results
When asked, 'How much time do you spend, at most, on deciding an email newsletter title (subject line)?', 60% of respondents answered that they complete it within 10 minutes, including those who take less than 1 minute.
On the other hand, approximately 40% of respondents spend 10 minutes or more on deciding the subject line.
Furthermore, a cross-analysis comparing the time spent on subject line creation with satisfaction regarding the open rate after distribution showed that approximately 70% of the group that created subject lines within 10 minutes were satisfied, compared to 57% of the group that spent 10 minutes or more. This suggests that spending more time on the subject line does not necessarily lead to higher satisfaction with the open rate.
What the Survey Results Indicate
While the email subject line is an important factor affecting the open rate, thinking about it for a long time does not always lead to better results.
Rather, it is considered important to build a system that allows for the creation of subject lines of a certain quality in a short time, utilizing past performance data, templates, and reader trends.
Combeez Inc. will continue to survey the actual conditions of email newsletter operators and disseminate information useful for efficient email marketing operations.
Survey Overview
Survey Target: Personnel involved in email newsletter operations
Survey Period: May 4, 2026 - May 29, 2026
Number of Respondents: 50 people
Survey Content: Time spent on creating email subject lines and satisfaction with open rates
Result: 60% of respondents create subject lines within 10 minutes. There is a tendency that spending more time does not necessarily increase satisfaction.
*This is an original survey and does not guarantee that the same trends apply to all email newsletter operations.
Combeez's Whitepaper
The company is characterized by content creation that leverages unique ideas, and conducts daily research on marketing and promotion.
Here are the practical email distribution efficiency prompts they have independently researched and created.
▼ 6 AI Prompts to Make Email Newsletter Creation 10 Times Easier ▼
https://x.gd/tlFkZ
▼ AI Prompts to Instantly Create Step Emails for B2B Products ▼
https://x.gd/FKsYn
Company Information
Company Name: Combeez Inc.
Location: Shibuya Scramble Square, 2-24-12 Shibuya, Shibuya-ku, Tokyo 150-6145
Representative Director: Yuichiro Yamazaki
Established: 2002
Business: Sales of email delivery tools 'Combeez Mail', 'Combeez Mail Plus', and 'Combeez Mail Light'
FAQ
What is the most important finding of this survey?
Spending more than 10 minutes on an email subject line does not lead to higher open rate satisfaction compared to creating it within 10 minutes.
Where can I get the AI prompts offered by Combeez?
They are available from the URLs listed in the press release, such as https://x.gd/tlFkZ.
How can I use these survey results?
Use them as a basis for streamlining email newsletter operations and consider introducing templates or AI tools.