Mirai Soaps And Body Care: What Happened To The Brand After Shark Tank?

Koko Hayashi is one of the most memorable entrepreneurs to appear on "Shark Tank." Hayashi charmed audiences with her bombastic personality and unique business concepts, but ultimately was unable to secure a deal in the two times she was invited onto the show. After pitching the concept of face yoga on Season 11 of "Shark Tank" and emerging without an investment deal, many assumed that Hayashi wouldn't return. However, the Japanese businesswoman got a second opportunity to appeal to the sharks with her new venture a few years later. 

In 2025, Hayashi appeared on "Shark Tank" once again; she presented her body care business Mirai Clinical, centering her pitch on the brand's deodorizing persimmon soap — a product targeted at eliminating Nonenal (which is the smell that can form on aging skin after age 40). You may remember Hayashi for her unique outfit (which was covered in photos of her own face) and the upbeat pitch that featured actors dressed in cartoon persimmon costumes waving at the judges. Hayashi came up with the idea for her deodorizing persimmon soap after a childhood friend made a passing comment about her grandmother's smell. Years after witnessing how it impacted her grandmother's confidence, Hayashi would learn the scientific reasoning behind Nonenal odor and create a soap made from Japanese persimmons to combat the chemical reaction.

Prior to presenting Mirai Clinical to the sharks, Hayashi underwent a troubling theft. In June 2024, twelve palettes (containing over 16,000 units) of the brand's body wash was stolen after being loaded onto a fake delivery truck. Hayashi addressed the incident while discussing Mirai Clinical's yearly profits with the panel of sharks, explaining that the FBI had gotten involved. Though no resolution has yet been made public, the theft impacted Hayashi's profits in a significant manner.

While Koko Hayashi's second pitch on "Shark Tank" was better received by the panel of sharks than her first, neither resulted in investment. Hayashi presented her skin care brand Mirai Clinical on Season 16, episode 19 of the series, focusing on her Nonenal-targeting deodorizing persimmon soap. Hayashi explained that Japanese persimmons are scientifically proven to eliminate age-related odors; by smelling younger, Hayashi explained, older adults in America could regain confidence. Hayashi began her pitch by passing around a perfume that imitated the smell of an "old man" to illustrate the effect of Nonenal on individuals over the age of 40. Hayashi asked the sharks for $500,000 for a 5% stake in Mirai Clinical.

At the time of filming, Mirai Clinical had sold $8.7 million on their online storefront over the ten years Hayashi had been in business. However, while the sharks were impressed by the brand's lifetime sales, Hayashi's yearly sales were slightly problematic. While they could have made $4 million for the year, Hayashi said, the theft of over 16,000 units of body wash in transit to their fulfillment center impacted potential sales. Instead, Mirai Clinical made $2.2 million, with $250,000 in net profit (while 30% of the profit being spent on Facebook advertisements). 

However, the sharks were not confident that consumers in the U.S. would see the benefit in Nonenal-specific soap rather than traditional products meant to target generic body odor (there are many body washes to keep you smelling fresh, after all). Although Hayashi tried to make the point that America's population is aging just like the dominant population in Japan, they still weren't convinced. "I don't really think that everybody who is over the age of 40, men and women, smell weird," shark Lori Greiner said. While none of the sharks invested in Mirai Clinical, the business was far from done.

Since her second appearance on "Shark Tank," Koko Hayashi's body care brand Mirai Clinical has thrived. In an interview with Beauty Independent after the episode aired, Hayashi revealed that traffic to the site immediately increased by 100x. Smartly, Hayashi listed a Shark Tank Bundle on the site which included their deodorizing soap with persimmon, the purifying and deodorizing body wash with persimmon, a soap holder, as well as a complimentary bag of wipes. 

While the site traffic increased, it wasn't as high as Hayashi had anticipated. Nevertheless, the business is still around in 2026 and doing well. As Hayashi explained to Beauty Independent, all new beauty products are received with skepticism at first. "Wrinkle cream used to get backlash when it first came out, but now it's mainstream. So, every time you start something new, you always get backlash," Hayashi said. "That's a sign that you are innovating." It's true that both bar soap and body wash each have their own benefits, and there are other nontraditional options out there, like goat milk soap that can be good for your skin.

Mirai Clinical is still in business as of 2026. Koko Hayashi's Nonenal-targeting body care products continue to get thousands of positive reviews, as mature customers have reported that the original deodorizing soap bar has worked wonders on their skin. Customer testimonies are regularly featured on the brand's social media platforms, as Hayashi seeks to prove the "Shark Tank" panel wrong. 

Hayashi's product line has remained the same since the time of filming, with the deodorizing persimmon bar soap, body wash, stick deodorant, and body wipes all still available online. Mirai Clinical has even posted a waitlist for their upcoming persimmon soap with mint, indicating that Hayashi is doing well enough to grow and expand the business. Nevertheless, "Shark Tank" is still helping Hayashi's growth, as she reports that people still recognize her from the series. "The show is impactful. Every time I introduce myself now, I say 'Shark Tank' twice. It's really cool," she told Beauty Independent.

Entrepreneur Koko Hayashi is still working hard to make Mirai Clinical a success. In addition to the development of her KoKo Face Yoga brand on Instagram, Hayashi continues to build Mirai Clinical's social media presence as well. Mirai Clinical is active on Instagram and Facebook, mainly showcasing customer testimonies about the effectiveness of Hayashi's persimmon soap. Hayashi also occasionally reposts clips of her "Shark Tank" pitch on Mirai Clinical's social platforms to maximize visibility. 

Hayashi is certainly dedicated to her concept, as she hasn't changed her product lineup in any significant way since her appearance on "Shark Tank." During an August 2026 interview with SDVoyager, Hayashi explained that she still thinks her experience makes Mirai Clinical unique, as opposed to body care competitors. "What sets us apart is our authenticity. Mirai Clinical was founded by me, a Japanese scientist who brought this well-established Japanese scientific approach to aging-related odor to the U.S.," Hayashi said. "We are proud to have created greater awareness of a sensitive but common issue while offering effective solutions for the body, hair, and home."