Wa-shi letter set -KOI BUMI- Refill

  • 1710TSU5M
  • 1710TSU5M
  • 1710TSU5M



Traditional Crafts Letter Set  Koibumi – thousand year love –

It is a product for proposing to help you communicate your feelings through historical traditional crafts, enrich your mind.


This is Ogawa Washi. You can enjoy delicate hues.

Please use it as a refill for Koibumi premium or light.
You can also use it separately.


恋文シリーズ 和紙リフィル



It is a collaboration product of local industry called “Washi” and “paulownia box” traditional crafts in Saitama Prefecture, in Japan.

It is a high-grade letter set that recognizes Japan’s prideful history and culture and feels the beauty of Japanese.




About material


Hosokawa paper (Ogawa Washi) in Ogawamachi Saitama Prefecture -Higashi Chichi village-


Ogawamachi, Saitama Prefecture · Higashi Chichi village is a historic place of 1,300 years, which kept on supporting the paper demand of Edo in the past, the Japanese paper made there is called “Ogawa Washi.”

Craftsmen make better paper as cold winter.

Among even if severe winter cold, they are carefully made one by one.

Ogawa Washi is made with clean water, air and people’s hands.

小川和紙 原料 
小川和紙 工程


The  story of product development


We opened a shop in Bonsai town in Saitama prefecture, which is famous worldwide as a sacred place of BONSAI in April 2014.


和雑貨・手づくり雑貨とワークショップ つくりえ 2015年オープン


As a place for people to gather in common fun (handmade), we operated the workshop space and provided sales opportunities (box shop).

Six months after opening, the store got burned down, the shop closed due to the grueling fire.

At that time, many customers and stakeholders sent encouraging handwritten letters to us.





Until then, I used Internet tools only, except New Year’s cards. For us who were depressed feeling, the handwritten letters gave me a very wonderful courage.

I realized that anyone could write a letter from children to adults. We can easily mail you. Moreover, feelings are transmitted without misunderstanding. We found the letter is the best handmade tool.


We embarked on product development that the letter was perfect as a tool to convey “warmth of handmade” which is also our concept, I came to the material called Ogawa ‘s Washi and Kasukabe’ s paulownia box.


I thought that we could share the work process, the background of the industry, feelings etc if we could actually see the craftsman. (Most of us are actually able to meet craftsmen with whom we associate.)


I want to write a reply when I get a letter. Writing a reply will be an interactive two-way interaction. Among them, I want to write letters to other people. I believe that opportunities to send letters will increase, more people will receive it, and will spend more time warming people’s feelings as time goes slowly to paper.




Japan has a beautiful culture. We value the feeling of the season and choose the item of color, material and quality that fits the situation.


This product is suitable for certain occasions, such as thank-you notes to important customers, letters to my beloved family, and serious feelings for my future self. I hope you find it useful.


About Koibumi Refill



Product content

Approximate weight 20g
Package size (length × width × height) 21.5 × 4.0 × 3.7 cm
Wachi Ogawa papre
(Approximately 18 x 270 cm ,B5 size paper letter for 10.5 sheets)



Please choose the color according to the gift.



(“Koibumi” is a registered trademark of Tsukurie.  Trademark registration No. 5922942)


refill vol.1 Pinkorder number 1710TSU5M-001

Retail Price(Including Tax)
Stock Status
In Stock

refill vol.2 Indigo×whiteorder number 1710TSU5A-001

Retail Price(Including Tax)
Stock Status
In Stock