Koko Hayashi founded Mirai Clinical in 2014 after noticing the problem of a special body odor called nonenal, which happens as people age. She saw this issue when living with her grandmother, whose body odor made visitors uncomfortable. Koko learned that persimmon extract can remove this odor, which regular soap cannot.
Mirai Clinical’s most famous product is a persimmon soap that effectively removes the nonenal odor, helping people feel clean and confident as they get older. Koko appeared on Shark Tank Season 16, Episode 19, to promote her business and ask the Sharks for investment to grow her company.
The company focuses on natural, science-backed skincare products free from harmful chemicals, targeting age-related body odor. Mirai Clinical sells its products online and has gained attention for its unique solution to this common aging problem.
| Company Name | Mirai Clinical | |
| Founder | Koko Hayashi | |
| Founded | 2014 | |
| Product | Deodorizing solutions for any age | |
| Asked For | $500k for 5% equity | |
| Final Deal | No Deal | |
| Sharks | No Sharks | |
| Episode (Shark Tank USA) | S16 E19 | |
| Air Date | May 9th, 2025 | |
| Business Status | In Business | |
| Website | Visit Website | |
| Headquarters | Spring Valley, California, USA | |
| Lifetime Worth (Sales) | $9 Million *estimated | |
| Valuation | $10 Million *estimated | |
Mirai Clinical Body Wash for Strong Body Odor
- Nonenal Eliminator for Women & Men
- Renewing Body Purifying
- Long Lasting Luxury
Who Is The Founder Of Mirai Clinical?
Mirai Clinical was founded in 2014 by Koko Hayashi, a Japan-born U.S. citizen. She completed her Master’s degree in Entrepreneurship at CUHK Business School before working as an Associate at Avergence Inc. for a few years. After that, she started her own deodorizing solutions business, Mirai Clinical. Alongside this, she also runs another business called Koko Face Yoga.
How Was The Shark Tank Pitch Of Mirai Clinical?
Koko Hayashi appeared on Shark Tank asking for $500,000 in exchange for 5% equity in her company Mirai Clinical, valuing it at $10 million.
She explained how her persimmon-based soap helps remove the special body odor that comes with aging. She also offers other products under the Mirai Clinical brand.
Barbara Corcoran showed interest in sales data. Koko shared that her lifetime sales are $8.7 million, with $2.2 million in sales in 2023 and a net profit of $250,000. She expects $4 million in sales for 2024.
Koko said she sells products online through her official website and Amazon. She spends about 30% of her revenue on Facebook ads, with a return on ad spend (ROAS) of 2.5. Most sales (53%) come from the soap bar, which costs $1.85 to make and sells retail for $17.97.
Mark Cuban was not interested and declined. Robert Herjavec said Koko did not provide enough valuable data to justify the $10 million valuation, so he declined. Lori Greiner said it was not a product she wanted to invest in and declined.
Barbara Corcoran said she married an old man who smells fine, so she is out. Kevin O’Leary thought the valuation was too high and also declined.
In the end, Koko did not get any investment from the Sharks.
Breakdown Sharks Offer
Note: Here’s a quick summary of the offers and counteroffers between the Sharks and Koko Hayashi:
| Sharks | Offers |
| Kevin O’Leary | No Offer |
| Barbara Corcoran | No Offer |
| Mark Cuban | No Offer |
| Lori Greiner | No Offer |
| Robert Herjavec | No Offer |
| Founder’s (Countered) | No Counter |
| Final Deals | No Deal |
Mirai Clinical Shark Tank Update
Koko Hayashi entered Shark Tank with a very high valuation for her company Mirai Clinical, which led all the Sharks to refuse investing. Despite this, she had generated strong sales through heavy social media marketing.
Mirai Clinical sells natural body care products made using persimmon fruit, including soap, body wash, shampoo, wipes, and deodorant. The persimmon ingredient helps remove the special body odor that comes with aging.
Although Koko did not secure investment on the show, her company gained national exposure through the Shark Tank promotion, increasing public awareness of Mirai Clinical’s unique products.
What Is the Net Worth of Mirai Clinical?
Based on the last valuation of $10 million and lifetime sales exceeding $9 million in 2024, Mirai Clinical’s current net worth is estimated to be around $12 million. This estimate takes into account typical market growth and sales data trends for the company.
