Limited to 3,000 bottles per year. Introducing 'An四季+' (Anshiki Plus), a well-aging introductory serum formulated with 'AF Rice Ferment Extract' using Japan's only traditional pressing method.

株式会社infini (Infini Inc.) (Headquarters: Kawasaki City, Kanagawa Prefecture) will release the introductory serum 'An四季+ Booster Serum' as the first product from its skincare brand 'An四季+'.

The core of this product is our unique ingredient, 'AF Rice Ferment Extract,' which is extracted using Japan's only traditional pressing method, born from the cooperation of rice farmers and sake breweries in Tsuruoka City, Yamagata Prefecture.

※ As a 'skincare product containing rice ferment extract extracted by traditional Japanese pressing method' in Japan / Researched March 2026 by Koken Co., Ltd. and Watarai Honten Co., Ltd.

■ The Reason It Cannot Be Mass-Produced Lies Here

An四季+ prioritized 'delivering the original power of fermentation with as little loss as possible'.

Unlike general mass production, the extraction using the traditional Japanese pressing method requires a great deal of time and effort for each step.

However, we did not choose that path.

We believe that to carefully draw out the original benefits of the ingredients, one must dedicate themselves to each step without sparing time or cost.

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 a decision not to choose mass production.

This is the starting point of An四季+'s product manufacturing.

■ The Blessings of Fermentation from Tsuruoka City, Yamagata Prefecture

The 'AF Rice Ferment Extract' formulated in this product is carefully extracted using the traditional Japanese pressing method under the rich natural environment of Tsuruoka City, Yamagata Prefecture.

Fermentation, a wisdom deeply rooted in Japan, brought into modern skincare.

Because it is a manufacturing method that respects the original value of fermentation rather than mass production efficiency, it has been completed as a unique ingredient that cannot be achieved elsewhere.

Something used directly on the skin.

Because it is something used daily,

We have not compromised at all, right from the ingredient selection stage.

■ A New Concept: The 'No. 00' Serum After Washing Your Face

The first drop after washing your face changes the future of your bare skin.

As people age, many experience:

• Skincare products are difficult to absorb.

• Loss of firmness due to dryness.

• Instability in the skin's foundation.

An四季+ focuses not on 'what to layer,' but on 'how to prepare the skin',

The importance of the 'first drop.'

A new habit of using a 'No. 00' serum immediately after washing your face. By preparing the skin at the beginning of your skincare routine, it supports the absorption of subsequent lotions and serums and delivers moisture to the stratum corneum.

From the concept of preparing the skin,

To the idea of preparing the skin's foundation.

This is the 'foundation beauty' concept for well-aging proposed by An四季+.

■ First Product: An四季+ Booster Serum

As the first product in the An四季+ series, we present the 'An四季+ Booster Serum'.

This single drop, used first after washing, is designed to prepare the skin's foundation. By incorporating it as the first step in your daily skincare routine, it leads to a healthy, moisturized skin impression.

With continuous use in mind, we have paid close attention to every detail, from texture and usability to skin compatibility.

■ All from the Foundation.

Whether it's building a field,

Building a house,

Or building a body.

Beautiful results always come from a solid foundation...