Why has Mercari's same-day shipping option usage declined by 25% among Tokyo-based sellers in the past quarter?

Introduction

Mercari's same-day shipping option decline among Tokyo-based sellers is a concerning trend that requires immediate attention. To address this issue, I'll employ a systematic approach to identify, validate, and resolve the root cause while considering both short-term fixes and long-term strategic implications.

Step 1

Clarifying Questions (3 minutes)

• Looking at the timing, I'm thinking there might be seasonal factors at play. Has this 25% decline been compared to the same quarter last year?

Why it matters: Seasonal variations could explain the decline and impact our solution approach. Expected answer: Yes, it's been compared and the decline is still significant. Impact on approach: If seasonal, we'd focus on year-over-year trends; if not, we'd investigate recent changes.

• Considering user segments, I'm curious about the seller demographics. Has there been any shift in the types of sellers using the platform in Tokyo?

Why it matters: Changes in seller demographics could indicate a shift in platform usage or preferences. Expected answer: No significant changes in seller demographics have been observed. Impact on approach: If demographics changed, we'd tailor solutions to new seller types; if not, we'd focus on existing seller needs.

• Thinking about recent changes, have there been any updates to the same-day shipping feature or related systems in the past quarter?

Why it matters: Recent changes could directly impact feature usage and help pinpoint the cause. Expected answer: A minor UI update was implemented two months ago. Impact on approach: If changes occurred, we'd investigate their impact; if not, we'd look at external factors or gradual trends.

• Considering competitive landscape, has there been any significant change in same-day shipping offerings from competitors in Tokyo?

Why it matters: Competitive pressures could be driving sellers away from our same-day option. Expected answer: A major competitor launched a new expedited shipping program last month. Impact on approach: If competition increased, we'd focus on differentiation; if not, we'd look more at internal factors.