An四季+ Booster Serum, featuring 'AF Rice Ferment Filtrate' from a Yamagata Prefecture Tsuruoka City Sake Brewery, Wins No. 1 Newcomer Award in Cosme Rurupo 2026 First Half Honest Cosmetics Booster/Introductory Serum Category. Also Achieves No. 2 on LIPS Ranking.

"Cosme Rurupo 2026 First Half Honest Cosmetics Booster/Introductory Serum Category Newcomer Award No. 1"

An四季+ (Anshiki Plus), a skincare brand developed byinfini Inc. (Headquarters: Kawasaki City, Kanagawa Prefecture), is pleased to announce that its first product, 'An四季+ Booster Serum,' has won the 'Cosme Rurupo 2026 First Half Honest Cosmetics Booster/Introductory Serum Category Newcomer Award No. 1.'

We received direct notification of this award from the Cosme Rurupo editorial department, and we are deeply honored to receive this third-party evaluation so soon after the brand's launch.

Furthermore, the product achieved the No. 2 spot in the Booster/Introductory Serum category on the beauty platform 'LIPS' (as of June 2026).

With numerous customer reviews also being posted on @cosme, the brand's support has steadily grown in approximately three months since its release.

An四季+, with its brand concept of 'Everything starts from the foundation,' has proposed a new skincare habit: using a 'No. 00 Serum (Introductory Serum)' immediately after washing your face.

What we value is the idea of 'how to prepare' rather than 'what to layer.'

We believe that the evaluation from many customers and beauty media is a result of our continuous proposal of a new value, 'fermentation x foundational skincare,' centered around 'AF Rice Ferment Filtrate' derived from a sake brewery in Tsuruoka City, Yamagata Prefecture.

Direct Award Notification from Cosme Rurupo Editorial Department

In June 2026, we received notification from the Cosme Rurupo editorial department of our award for 'Cosme Rurupo 2026 First Half Honest Cosmetics Booster/Introductory Serum Category Newcomer Award No. 1.'

Receiving such recognition in the short period of approximately three months since the brand's launch is a great encouragement for An四季+.

We view this award not merely as a result, but as proof that the concept of 'foundational skincare' that the brand has been proposing is gradually reaching customers and beauty media.

An四季+ aims to be a brand that naturally integrates into daily skincare and can be continued for a long time, rather than relying solely on flashy advertising or temporary trends.

That first drop that touches your skin after washing your face.

We want to deliver that single drop not just as a serum, but as an important habit for building future bare skin.

We are sincerely delighted that 'An四季+ Booster Serum,' born from this desire, has led to this third-party award.

【June 2026】Recommended Popular Ranking for Booster/Introductory Serums: No. 2

A Brand Supported by Many Customers in Approximately 3 Months Since Launch

Since its release on March 13, 2026, 'An四季+ Booster Serum' has received numerous comments from customers through our official website, beauty review sites, and social media.

On @cosme, customers who have actually used the product have posted reviews regarding its texture, how it blends into the skin, and its ease of incorporation into daily skincare routines.

While many water-based booster and introductory serums are available, An四季+ has focused on the smooth texture unique to an oil-based formula. We have received many comments about the comfortable feeling of it blending into the skin right after washing, and the new sensation of incorporating it at the beginning of skincare.

In addition, the product has garnered attention on multiple beauty platforms, including achieving the No. 2 spot on the LIPS recommended popular ranking.

Receiving multiple recognitions—the Cosme Rurupo award, the LIPS ranking, and increased reviews on @cosme—in the short period of approximately three months since launch marks a significant turning point for An四季+.

We are not aiming for temporary buzz.

We want it to be something customers naturally reach for after washing their face each day.

We want the time spent facing one's skin to become a little more deliberate with each use.

We want it to be skincare that allows one to feel positive about aging.

An四季+ wants to be a brand that cherishes such small, daily accumulations.

'AF Rice Ferment Filtrate' Born from Tsuruoka City, Yamagata Prefecture

An四季+ embodies the brand concept 'Everything starts from the foundation.' It proposes a new habit of preparing the skin's foundation at the beginning of daily skincare.

Why was An四季+ born?

An四季+ was created to give form to the concept of 'foundational skincare.'

In our pursuit of a serum that could be used throughout one's life, the answer we arrived at was not 'to supplement what is lacking,' but the idea of 'preparing the skin's foundation.'

An四季+ is a booster serum born under the concept 'Everything starts from the foundation,' inspired by the blessings of fermentation derived from Japanese seasons and sake breweries.

The core of An四季+ is 'AF Rice Ferment Filtrate,' jointly developed by Koken Co., Ltd. and a sake brewery, with the cooperation of rice farmers and sake breweries in Tsuruoka City, Yamagata Prefecture.

Tsuruoka City, Yamagata Prefecture, is a land blessed with abundant nature, where rice cultivation and fermentation culture thrive.

Rice cultivation and fermentation culture both start from the foundation.

Preparing the soil, discerning the water, facing the climate, the craftsman's discernment and skill, and long-honed senses—each step is accumulated.

An四季+ aims to utilize the wisdom of fermentation, deeply rooted in Japan, in modern skincare, and thus encountered the craftsmanship of this region.

Fermentation is a Japanese wisdom that draws out the blessings of ingredients over time.

Something that cannot be born from efficiency alone. Something that cannot be achieved by rushing. Respecting nature's power by facing ingredients without sparing effort.

This attitude is also the very essence of An四季+'s manufacturing process.

'AF Rice Ferment Filtrate,' formulated in 'An四季+ Booster Serum,' is carefully extracted through the craftsman's discernment, skill, and long-honed senses, with the cooperation of rice and sake breweries in Tsuruoka City, Yamagata Prefecture.

Because it is applied directly to the skin, we do not compromise from the raw material selection stage.

Because it is used daily, we choose things that are trustworthy down to their background.

An四季+ has addressed each aspect of raw material origin, manufacturing method, and quality with this philosophy.

Today's bare skin connects to the future.

Skin doesn't change in a day.

However, daily accumulation changes the bare skin of the future.

An四季+ wants to be a presence that supports that accumulation.

Limited to 3,000 bottles per year. Manufacturing that prioritizes quality over mass production.

What An四季+ valued most was 'delivering the original blessings of fermentation with as little loss as possible.'

Unlike typical mass production, extraction using traditional Japanese pressing methods requires significant time and effort for each step.

If we had prioritized only efficiency, we might have been able to produce more, faster.

However, An四季+ did not choose that path.

We believed that to carefully draw out the original blessings of the ingredients, it was necessary to dedicate time and cost without reservation, and to approach each step with sincerity.

As a result, this product has a production system limited to 3,000 bottles per year.

It's not that mass production is impossible; it's that 'we chose not to mass produce.'

This decision is the origin of An四季+'s manufacturing philosophy.

Skincare touches the skin every day.

Therefore, we believe that the difference in quality appears not only in visible splendor but also in the unseen background.

Where did the ingredients come from? How were they made? With what thoughts were they commercialized?

An四季+ will continue its sincere manufacturing, cherishing each of these backgrounds.

*As a 'skincare product containing rice ferment filtrate using traditional Japanese pressing methods' in Japan / Researched by Koken Co., Ltd. and Watarai Honten Co., Ltd. in March 2026.

'No. 00 Serum' Proposes a New Habit of 'Foundational Skincare.'

An四季+, born from the idea of 'preparing,' prepares the skin's foundation with the first drop after washing, comfortably supporting subsequent skincare.

An四季+ aims to create skin that is less susceptible to changes in age and season. It proposes a new beauty habit of preparing the skin at the beginning of daily skincare, not just supplementing what is lacking.

The 'No. 00 Serum' proposed by An四季+ is an introductory serum used before lotion, before serum, at the very beginning of skincare.

Delivering that first drop to freshly washed, bare skin.

We aim to prepare the skin with that single drop and support the blending of subsequent skincare.

As people age, many experience changes in their skin.

Lack of firmness due to dryness. Difficulty for skincare to blend in. Skin fluctuations due to season or environment.

An四季+ focuses on 'how to prepare the skin first,' rather than 'what else to add' in response to these changes.

By preparing the skin at the beginning of skincare, it supports the comfortable incorporation of daily care, from lotion and serum to cream that follows.

This is what An四季+ considers 'foundational skincare.'

From the concept of preparing the skin to the idea of preparing the skin's foundation.

The 'No. 00 Serum,' used immediately after washing, is a proposal to incorporate that idea into a daily habit.

Everything Starts from the Foundation. An四季+ Aims for Well-Aging.

Daily skincare begins with preparing the skin's foundation. This is An四季+'s philosophy, symbolizing the brand concept 'Everything starts from the foundation.'

When the foundation is prepared, bare skin changes surprisingly.

An四季+ was born from the idea of 'how to prepare,' not 'what to layer.' By preparing the skin with the first drop after washing, it proposes a new beauty habit that comfortably incorporates subsequent skincare.

An四季+'s brand concept is 'Everything starts from the foundation.'

Whether it's preparing soil for farming, building a house, or building a body, beautiful results are built on a solid foundation.

We believe skin is the same.

Instead of just superficially layering something, prepare the skin in the first step of daily care.

That accumulation leads to the impression of future bare skin.

Today's care creates tomorrow's bare skin.

An四季+'s proposed 'foundational skincare' is based on the concept of well-aging, which views aging positively.

Not getting old, but growing older.

Being beautiful along with changes, rather than denying them.

Skin, mind, and daily habits.

Carefully preparing all of these is what An四季+ considers adult beauty.

We want to deliver skincare that faces the future skin while cherishing the present self.

Materials, Manufacturing, Containers: All Made in Japan

An四季+, born from inspiration from Japanese seasons and fermentation culture, supports the skin's foundation through daily skincare while embracing the changing skin.

Women's skin changes daily due to age, season, and living environment. An四季+ proposes a new habit of 'foundational skincare' that supports the skin's beauty at each moment, mirroring the changing Japanese seasons.

An四季+ is committed to domestic manufacturing not only for the product's contents but also for container quality and manufacturing background.

Japanese fermentation culture. Japanese materials. Japanese craftsmanship.

An四季+ aims to be a brand that delivers the value of J-Beauty as modern skincare.

From the formulation applied directly to the skin, to the weight in hand, the sensation of drawing a drop with the dropper, and the beauty of the gesture felt with each daily use.

Skincare is not just about function; it is also a small experience within daily life.

An四季+ wants to cherish this entire experience.

We have pursued the balance of quality and usability by developing products with reliable domestic partners, from raw material procurement to manufacturing, filling, and final product realization.

Differences in quality appear in the unseen parts.

With this philosophy, we aim to create products that can be used with confidence every day.

Post-Launch Response and Expanding Brand Expectations

Since its launch, An四季+ has received inquiries and collaboration requests not only from customers' reviews but also from various media outlets, including beauty magazines and women's magazines.

This Cosme Rurupo award and the No. 2 ranking on LIPS have been significant milestones in the brand's journey.

However, what is truly important to An四季+ is not the rankings or awards themselves.

It is that customers choose and continue to use An四季+ in their daily skincare routines.

And that their voices gradually spread.

We believe that this accumulation leads to the brand's trust.

An四季+ will continue to work on improving products and brand communication while listening to the voices of each and every customer.

Tsuruoka City, Yamagata Prefecture. A land of fermentation with over 400 years of history.

Future Prospects - Japanese Fermentation Culture for Future Bare Skin

Starting with its first product, the booster serum, An四季+ will proceed with product development centered on 'fermentation x foundational skincare.'

In the future, to further expand the skincare habit that begins with the first drop after washing, we will strengthen new product development, communication through beauty media, and brand communication via social media.

Japanese seasons. Japanese fermentation culture. Sincere Japanese manufacturing.

An四季+ aims to be a brand that connects these values to modern skincare and disseminates them both domestically and internationally.

Because it is applied directly to the skin, we do not compromise on raw materials, manufacturing methods, containers, or usability.

And to be a presence that quietly accompanies customers' daily lives and supports the creation of future bare skin.

An四季+ will continue to deliver new value in fermentation and foundational skincare under the brand concept 'Everything starts from the foundation.'

Product Overview

Product Name: An四季+ Booster Serum Volume: 30mL Price: 16,500 yen (tax included) Release Date: March 13, 2026 Sales: Official Online Store Official Website: https://an-shikiplus.com/

Features

・ Contains 'AF Rice Ferment Filtrate' from a Yamagata Prefecture Tsuruoka City sake brewery

・ 'No. 00 Serum (Introductory Serum)' used immediately after washing face

・ Foundational skincare with the concept 'Everything starts from the foundation.'

・ Adopts rice ferment filtrate using traditional Japanese pressing methods (*)

・ Limited production of 3,000 bottles per year

・ Made in Japan

Awards and Achievements

・ Cosme Rurupo 2026 First Half Honest Cosmetics Booster/Introductory Serum Category Newcomer Award No. 1

・ LIPS Booster/Introductory Serum Recommended Popular Ranking No. 2 (as of June 2026)

・ Received numerous reviews on @cosme

Company Overview

Company Name:infini Inc. Location: Kawasaki City, Kanagawa Prefecture Representative: Ai Hashimoto Inquiries: info@an-shikiplus.com

'An四季+ Booster Serum,' winner of the No. 1 Newcomer Award in the Booster/Introductory Serum Category at the 2026 First Half Honest Cosmetics Awards.

An四季+ Booster Serum. Contains rice ferment filtrate* from a sake brewery in Tsuruoka City, Yamagata Prefecture, and is a booster serum that prepares the skin with 'the first drop after washing.' With the concept 'Everything starts from the foundation,' it proposes the creation of a foundation for daily skincare. *Moisturizing ingredient.

'No. 00 Serum' used immediately after washing. It prepares the skin with the first drop at the start of skincare, comfortably supporting daily care with lotion and serum. After washing your face, use 2-3 drops on your bare skin. Then, proceed with your usual skincare routine.

An四季+ proposes a new skincare habit of preparing the skin's foundation, embracing changes in age and season. Under the brand concept 'Everything starts from the foundation,' it proposes the creation of future bare skin. An四季+ Booster Serum contains 'AF Rice Ferment Filtrate' from a sake brewery in Tsuruoka City, Yamagata Prefecture. It proposes a new skincare habit of 'foundational skincare' that utilizes the blessings of fermentation.

A new skincare habit that begins with the first drop after washing. Explore the new concept of 'foundational skincare' on our official online store.