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How Mirai Clinical Turned Persimmon Soap into a $3M Success Story

The Niche Soap Brand That Cracked The DTC Code With AI

From corporate life in Japan to scaling a niche soap business in the U.S. to over $3 million read how Mirai Clinical created a Persimmon soap to battle the ageing odor.

This week’s DTC daily podcast features founder Koko Hayashi, who shares how embracing Facebook Ads, AI, and a unique marketing strategy led to her success in an unexpected market. 

👉Using Amazon’s DSP to find customers

The challenge: Offer high-end products in a low-cost market

People are hesitant to buy expensive soap when they can get a similar product at a lower price…

Mirai Clinical did two things to overcome this:

  1. Used DSP to educate why their premium product was worth the higher price.

  2. Focused on finding customers who prioritised quality over price.

As Koko puts it:

“We test everything from AI UGC to employee generated content. You never know what’ll win until you try.”

📈 The Growth Driver: AI UGC> human UGC

Surprisingly, they found AI-generated UGC was outperforming real creators in their ad performance.

Why it worked

  • More affordable to create at scale

  • Total control over script, visuals, and delivery

  • Rapid testing of multiple versions to find top performers

Advice for Founders

Thinking of launching a niche business? Here’s Koko’s playbook:
Test everything, assume nothing
Maximise efficiency
Keep trying new technology

🎧 Listen to the full episode to learn how Mirai Clinical turned an unexpected product into a cult hit. Watch on YouTube

👉Amazon

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