Mirai Clinical Update | Shark Tank Season 16
While working in Japan, Koko Hayashi found out that many people over 40 start to smell a certain way, something called Nonenal. Regular soap didn’t fix it, but she noticed people there used persimmons to get rid of the smell. So she made Mirai Clinical, a soap and body care line that helps older adults smell clean and feel good. Will this age-targeted solution impress the sharks? Let’s find out in our Mirai Clinical update and pitch recap.
If you’re short on time, here’s a quick overview of what happened to Mirai Clinical after
Koko entered
In terms of a Mirai Clinical update, the company received a boost in sales after airing on
| Shark | Result |
| Kevin O’Leary | No offer |
| Barbara Corcoran | No offer |
| Lori Greiner | No offer |
| Robert Herjavec | No offer |
| Mark Cuban | No offer |
Shark Tank Mirai Clinical Pitch
- Entrepreneur: Koko Hayashi
- Business: Japanese persimmon-based soap
- Ask: $500,000 for 5% equity
- Result: No deal
- Shark: None
Koko Hayashi returned to
She introduced a line of Japanese persimmon-based body care products designed to eliminate a specific type of age-related body odor called Nonenal, also known as “old man smell” in Japan.
She explained that after age 40, the body starts producing this odor, and persimmon helps neutralize it due to its high tannin content.
The products include soap bars, body wash, deodorizing wipes, and deodorant sticks, all formulated with persimmon extract.
Koko claimed it was effective at neutralizing this odor due to its high tannin content.
Lori Greiner and Robert Herjavec asked how it differs from regular deodorant soap. Koko said American soaps only mask generic body odor, not Nonenal.
She also said a lab in Japan runs tests to confirm effectiveness.
When Kevin O’Leary asked if she had sales, Koko revealed lifetime sales of $8.7 million, with $2.2 million in the most recent year and $250,000 in profit.
However, she said 2024 sales would have reached $4 million if a shipment of body wash hadn’t been stolen en route to their fulfillment center in Nevada. The case was under FBI investigation.
Koko explained that 100% of sales come from online channels, including Amazon and her website.
Additionally, she spent 30% of revenue on Facebook ads and had a 2.5 ROAS (return on ad spend).
Kevin asked about product costs. Koko said her top-selling soap bar makes up 53% of sales, costs $1.85 to produce (including shipping from Japan), and retails for $17.97.
Robert questioned her $10 million valuation, while Mark Cuban said the concept was fun but not something he would invest in.
Koko tried to convince the sharks by highlighting the aging U.S. population and her position in an underserved market.
However, Lori and Barbara Corcoran didn’t believe the problem was widespread or convincing enough to drive mass sales.
Kevin said he was intrigued but couldn’t justify the high ask with the current numbers and unclear marketing strength.
In the end, none of the sharks made an offer.
Koko left without a deal, still confident in her product and surprised the sharks didn’t see its value.
Let’s see if the sharks’ rejection discouraged Koko from pursuing her business in our Mirai Clinical update.
Shark Tank Mirai Clinical Update
Our Mirai Clinical update found that despite not landing a deal, Koko has continued to grow the business.
In 2024, the company reported $3 million in annual revenue and set a goal to double that in 2025.
The exposure for
If you’d like to try some soap, you can find it on the Mirai Clinical website or on Amazon.
As the dust settles, we will be back for another Mirai Clinical update.
For more updates from
Before you go, be sure to check out our list of all the Shark Tank Season 16 products.
Marvin Uzor
Marvin Uzor is a content contributor for Shark Tank Recap. He specializes in crafting engaging, well-researched content that delve into the latest Shark Tank stories, keeping readers hooked. He has a soft spot for his favorite Shark Tank companies, Bombas and Doorbot, known for their innovation and impact.