Culture which is handed down is something old and culture as a tradition is something new.

To hand down culture is to receive the culture exactly as it is from our predecessors and pass it on exactly as it is to the next generation.

Tradition, on the other hand, is something that flows through the ages, adding something new and unique to your age before passing on to the next generation.

"Kenjyo Hakataori - Its Art and Spirit"
by Kisaburo Ogawa, Living National Treasure

What’s New

About Sera Creations

The Japanese traditional music has survived for thousands of years even to this day when things are moving and changing in a time-span of minutes. However, the population of Japanese traditional music is shrinking each year and this is an alarming sign for the future.

It is our firm belief that Japanese musical instrument related conditions, together with the quality of instrument related items must also evolve in order to stop this decline in Japanese traditional music player population, ultimately reversing the
decline so as to regain its glory.

We, the Sera Creations, are working to develop musical instrument related items that will respond to the needs of today’s Japanese traditional music players who seek modern “sound” and “playing”, because we believe that progress in music requires progress not only in “software” but also “hardware” – both working as the two wheels of a vehicle.

Japanese traditional music is a “Music of Japan”. “Japanese” should not feel it as “something far away”. We wish to make Japanese traditional music more casual, easy, and fun for all people – from beginners to professionals.

Sera Creations will continue its effort in serving the needs of all people who love Japanese music.


An innovative idea of “customizing sound with kotoji”. ※ Utility model registration obtained.

The first in the industry to use a cellulose nanofiber made from Japanese bamboos. This new material,“Nanoforest”, is a registered trade mark of Chuetsu Pulp & Paper Co., Ltd.

3 types of forms to create different “brilliance” and “depth” Type I, type II, small pillar (小柱)

Two types of “Tone colors” ―SORA― and ―MIKI―

Allows a very stable pitch ※ using non-slip tools. Endures strong picks or frequently repeated picks which leads to a comfortable performance.

All items are sold “independently”. Purchase your combination of items. Basic set: 12 Kotojis + 1 jinji(巾柱) + 1 shoji (小柱), non-slip sheet, tweezer for mounting Customized selections: From one item to any combination of items.

detail and purchase here

Fine ceramic Kototsume “almost free from lacks or cracks”. ※ Utility model registration obtained.

Two types of “Tone colors” Having almost 3 times more of hardness than stainless steel, 2 times more of rigidity, high wear resistance, corrosion resistance, and heat resistance.
The same material is also used in the fields of space, deep sea, and medicine.

Two types of “Tone colors” Good for any types of Koto.
Usable for all 13/17/20/25 strings Koto.

Two types of “Tone colors” Ideal for plectrums for practice.
Durable and long usable because they are highly wear resistant.

Two types of “Tone colors” Easy to create more volume of sounds, the sound quality is similar to ivory products.
Usable for performances at music halls

Two types of “Tone colors” The products come with variations of sizes S/M/L to match the size or your fingers.
The size ranges from the size of the thumb of a large man to the size of the forefinger of a small child.

detail and purchase here

Serafit – Koto pick-ring glue

箏爪輪糊 セラフィット

Sustainable product made from crab waste. *allergy-free

detail and purchase here

―Zipper ❶―

A simple design for easy carrying.

The case holds each Kotoji securely regardless of the numbers. Safely stores the Kotoji both vertically and horizontally. High quality for a reasonable price.


A nice texture of canvas and modern Japanese design.

The case holds each Kotoji securely regardless of the numbers.
Safely stores the Kotoji both vertically and horizontally.
Limited number of products is introduced time to time using seasonal patterns.
Fabrics used: Canvas no.8 from “SOU・SOU”

product detail & purchase

Story of this product

The products of Sera Creations were developed by people who, in their daily lives, have no relation to Japanese instruments. This, in fact, may be the reason why we were able to think from “outside- the-box” and come up with “unique and liberal ideas”.

Specialists from many fields of profession collaborated with pride, bringing together their skills and know-hows that they accumulated through long years of work. They made the impossible possible.

Sera Creations would like to express its deepest thanks to everyone who participated in this project, for their high “professional skills” and “will”, and most of all their “indomitable spirits” that drove them to continue to “keep on going with innovative thinking until the problem is solved”.

Story of this product

Message from the companies cooperated with for development

Niigata University Sakamoto Lab. Dr Sakamoto
coming soon…

TKS Co. Ltd.

The ceramic used for this Kotoji is a fine-ceramic, high-tech-ceramic. Because of its ivory-like color and strength, we decided to use alumina material.
Although we use machine to make the Kotojis, the finishing process is done manually for each product which is why every item is delicately different in color, gloss, and shape from others. Our goal is to make customers enjoy the unique character of Kotoji in their performance and also to share a small part in environmental protection through the manufacturing of the product.
Fine ceramics- definition by JIS:
Fine Ceramics are produced with precisely controlled chemical compositions, microstructures, microstructural fabric/ grain boundary, configurations and production processes to fulfill intended functions and which are composed mainly of non-metallic, inorganic substances.
Tsukasa Uehara
TKS Co. Ltd.

Chuetsu Pulp & Paper Co. Ltd.

The new Kotojis were given a significantly higher-strenth and higher-elasticity because of our new material “nanoforest” which is made of cellulose nanofibers that, by cutting pulp into nano-level size, gained a completely new characteristics. We are very pleased that our product was used for creating the new Kotojis, because it suggested a new area for the usage of the material. We hope our products to be used more broadly in the field of music.

Union Industry Co., Ltd.

Although we have a long history of making plant origin, ecological materials, it was a new challenge for us to participate in this project,  and have enjoyed studying the quality and volume of sounds.
We made several test products before deciding on the final version and it would be our great pleasure if this new Kotoji could help enhance the development of Japanese Music.


Fuji Rubber Industry is a rubber product manufacturer in Ishikawa prefecture with history of over 40 years.
The silicone anti-slip grip which we developed for Sera Creations is small, but has an important role, so it was quite a challenging task for us to meet the functional standard set by them. However, those standards were met by application of “wisdom gained from experience and innovative thinking”.
We will continue to make effort to create and supply good components to our customers.