#Japan #Email Marketing #Survey Results #Shibuya #Combeez

Introduction

In May 2026, Combeez Inc., a company based in Shibuya, Tokyo, led by CEO Yuichiro Yamazaki, conducted a unique survey focusing on the efficiency of crafting subject lines for email newsletters. The survey sought to understand how long marketers spend creating these crucial titles and how this impacts open rates and overall satisfaction.

Survey Findings

The survey posed the question: "How much time do you typically spend determining the subject line of your email newsletter?" The results were striking. Approximately 60% of respondents indicated that they manage to craft their email subject lines within ten minutes or less, including those who took under a minute. On the contrary, around 40% admitted to spending more than ten minutes on this task.

This data presents an interesting perspective on the relationship between the time invested in creating a subject line and the subsequent satisfaction with open rates. A cross-analysis revealed that 70% of those who took ten minutes or less were satisfied with their open rates, while satisfaction dropped to 57% among those who spent over ten minutes. This indicates that simply investing more time in creating a subject line may not inherently lead to higher satisfaction with open rates.

Implications of the Findings

The findings highlight key insights regarding the role of subject lines in email marketing. While it is clear that subject lines significantly influence open rates, the notion that longer contemplation directly correlates with better results does not hold true. Instead, the results suggest that companies should focus on developing efficient systems that leverage past performance data, templates, and an understanding of audience preferences to create quality subject lines in a shorter timeframe.

Combeez is committed to continuously studying the landscape of email newsletter operations and intends to provide valuable information that aids marketers in achieving their goals efficiently.

About the Survey

Conducted from May 4 to May 29, 2026, the survey involved 50 individuals engaged in email newsletter management. The focus was to analyze the time spent on subject line creation and the corresponding satisfaction with open rates. The finding that 60% of subject lines are crafted within ten minutes, coupled with the observation that taking longer does not necessarily equate to higher satisfaction, presents a significant shift in how email marketers approach their strategies.

It is essential to note that this survey is an original investigation by Combeez and does not guarantee that all email marketing operations will share similar trends.

Combeez’s Contribution to Email Marketing

Combeez Inc. stands out for its unique approach to content creation, continuously engaging in research related to marketing and promotion. The company prides itself on its innovative thinking and offers resources to streamline email marketing tasks. For those looking to enhance their efficiency in creating email newsletters, Combeez provides specially designed AI prompts that facilitate the process:

• - Six AI prompts to simplify email creation tenfold: Access Here
• - Instantly create BtoB product step emails using AI prompts: Explore Now

Company Information

Company Name: Combeez Inc.
Location: Shibuya Scramble Square, 2-24-12 Shibuya, Tokyo, 150-6145, Japan
CEO: Yuichiro Yamazaki
Founded: 2002
Business Scope: Sales of email distribution tools, including Combeez Mail, Combeez Mail Plus, and Combeez Mail Lite.