Mirai Clinical Net Worth & Shark Tank Update: From Shark Tank Rejection to Revenue Growth in 2025

When Mirai Clinical stepped into the Shark Tank spotlight, it introduced something most Americans had never heard of: Nonenal, a body odor associated with aging. Backed by centuries-old Japanese tradition and powered by natural persimmon extract, the brand made a bold ask, $500,000 for 5% equity, valuing itself at $10 million. The Sharks didn’t bite. But was that the end of the road for Mirai Clinical? Not at all.

This deep dive explores what happened after the show, breaks down the company’s net worth in 2025, and explains why Mirai Clinical may be winning despite the Sharks walking away.

What Happened After Shark Tank?

Mirai Clinical appeared in Season 16, Episode 19, which aired on May 9, 2025. Founder Koko Hayashi presented a passionate pitch rooted in personal experience and Japanese culture. She introduced a product line addressing a very specific issue: Nonenal, or “aging odor,” a common yet little-discussed problem after age 40.

Although the pitch was compelling, the Sharks declined the deal. The main concerns were:

• A valuation they felt was too high at $10 million
• Doubts about the size of the U.S. market for “old person smell” solutions
• Skepticism about consumer awareness of Nonenal

Despite the rejection, the show gave Mirai Clinical massive exposure. The company focused on educating the market, refining its e-commerce presence, and retaining its loyal customer base.

Today, Mirai Clinical remains fully operational, selling directly to consumers via its website and on platforms like Amazon and Walmart.com.

Mirai Clinical Net Worth in 2025

Net worth estimates for Mirai Clinical often hover around $10 million, but verified data tells a different story. Based on real revenue reports from credible sources, here’s a more accurate view of their financial standing:

• In 2024, the company generated $3 million in revenue
• For 2025, they aimed to double their revenue to $6 million

Considering these numbers and applying standard revenue multiples for the consumer products space, Mirai Clinical’s net worth is more realistically estimated at under $10 million.

The original $10 million figure likely originated from their Shark Tank valuation, which was never validated by an investment. Given their post-show revenue, a more realistic multiple would place their value between $4 million and $7 million, depending on profitability and operational costs.

Why the Sharks Declined to Invest

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Several critical factors led the Sharks to pass on the opportunity:

• The Sharks were skeptical of the $10 million valuation given the company’s $3 million in prior-year revenue. Kevin O’Leary expressed concern over the risk-reward ratio.
• Lori Greiner and Barbara Corcoran questioned whether “aging odor” was a recognized issue in Western markets. Corcoran even said her older husband “smells great,” casting doubt on the demand.
• The concept of Nonenal is well known in Japan but not in the U.S., which made the pitch feel early or misaligned with U.S. consumer awareness.

Still, the rejection didn’t stop the company. In fact, it gave Mirai Clinical an opportunity to take a different route to success.

The Visionary Founder: Koko Hayashi

Koko Hayashi, born in Hokkaido, Japan, founded Mirai Clinical in 2014 after a personal experience from childhood. She remembered classmates mocking her grandmother’s scent, which sparked her desire to develop respectful and effective solutions for aging-related body odor.

Before launching Mirai Clinical, Koko worked at NTT DATA and Avergence Inc., building her business foundation. She later earned an MBA in Entrepreneurship from CUHK Business School, adding academic strength to her practical knowledge.

She also previously appeared on Shark Tank Season 11 with Koko Face Yoga, a natural facial exercise method. Though she didn’t get a deal then either, that experience helped her build confidence in pitching to a national audience.

Koko’s product philosophy reflects traditional Japanese values. Mirai Clinical embraces a “less is more” skincare approach, using minimal and natural ingredients to deliver effective results.

The Product Line That Set Them Apart

Mirai Clinical’s entire product line is based on Japanese persimmon extract, which contains high levels of tannins, natural compounds that neutralize odor-causing chemicals like 2-Nonenal.

Their most popular products include:

• Deodorizing Soap with Persimmon (also available in a sensitive version)
• Purifying & Deodorizing Body Wash
• Aluminum-Free Natural Deodorant
• Persimmon-infused Shampoo and Body Wipes

What makes them unique is their claim of using a 97% tannin concentration, one of the highest in the market. This makes their products especially useful for consumers over 40 who deal with body odor that regular soap can’t handle.

Do Customers Actually Like It?

Yes, and the reviews speak volumes.

On Amazon, Mirai Clinical’s soap averages 4.4 out of 5 stars, with customers praising:

• Its ability to eliminate long-standing odor
• Its gentle formulation, suitable for mature or sensitive skin
• The natural, fragrance-free formula that avoids irritants

On platforms like Reddit, especially in forums like r/Menopause and r/30PlusSkincare, users describe their experience with Nonenal and how Mirai Clinical helped. The brand is frequently compared to Lume, another odor-control product, but often preferred for its targeted ingredients.

Common complaints include:

• The soap bars are considered pricey for their size
• Some customers would prefer a stronger scent

A Strange Twist: The Body Wash Heist

In a strange turn of events, over 16,000 bottles of Mirai Clinical’s body wash disappeared just before the Shark Tank episode aired.

Here’s what happened:

• A truck carrying the body wash vanished on its way to the warehouse
• The license plate on the truck was reported stolen years earlier
• The stolen bottles later appeared on sketchy websites at very low prices

Mirai Clinical warned customers not to buy from these unauthorized sellers, citing safety concerns. Though the theft was a big financial loss, the company continued operations without interruption, showing resilience in a difficult moment.

Where You Can Buy Mirai Clinical Products

Mirai Clinical focuses on e-commerce, selling products through:

• Their official website (miraiclinical.com)
• Amazon
• Walmart.com

They don’t currently sell in retail stores, which allows them to keep a tighter grip on branding, logistics, and customer service.

The company also supports international shipping, thanks to Passport Global, making their product line available to consumers worldwide.

The Science Behind the Soap

Scientific studies support the idea that 2-Nonenal is an odor molecule that forms after age 40 due to oxidation in the skin. It’s oil-based and hard to remove with regular soap.

Persimmon extract, rich in tannins, binds to and neutralizes these molecules. Several peer-reviewed sources and patent filings confirm that persimmon tannins are effective in eliminating these specific odors.

Mirai Clinical claims its formula includes a 97% tannin concentrate and is developed in collaboration with a Japanese pharmaceutical lab specializing in persimmon-based skincare, adding credibility to its claims.

Final Verdict: Are the Sharks Missing Out?

The Sharks didn’t believe in the product or market. But Koko Hayashi believed in both.

Mirai Clinical’s 2024 revenue was $3 million, with a goal to reach $6 million in 2025. Customers love their products, and online reviews are mostly positive. Although they didn’t get a deal, the company gained credibility and exposure, and it kept growing afterward.

Koko’s mission to introduce ancient Japanese skincare wisdom to the U.S. may have started quietly, but her strategy of focusing on education and direct-to-consumer sales seems to be working.