Seven Seas BUNCO

Seven Seas BUNCO

Tomoe River Notebook for
fountain pens in an
easy-to-carry A6 size.

Ink blotting paper included
【The following is a list of regions in which we are able to do business.】Under the license agreement with Nanami Paper, we are only able to sell these products in Europe, Asia, and the Middle East.


2 colors

Ruled lines: : Plain / 7mm grid lines
Size: : A6 (148mm x 105mm)
Number of pages:: 384 pages
Material: : Paper
Country of manufacture: : Japan
Seven Seas BUNCO by Watanabe Bookbinding

The Seven Seas series
now includes the portable
Seven Seas BUNCO

The Seven Seas series, popular among fountain pen and glass pen users, now has a sister product, “BUNCO,” in an A6 size for easy transport. Its lightweight design comes in a compact size, perfect for on-the-go. Carry it in your hand or in your bag along with your favorite fountain pen so it’s there when you need it.

Seven Seas BUNCO by Watanabe Bookbinding

Conceived in California
born in Japan

Nanami Paper, a stationery store in California once reached out to us, “We would like to sell notebooks with Tomoe River Paper, but we can’t manufacture the thin paper locally, can we work with Watanabe Bookbinding to make a special notebook series?” The Seven Seas series of notebooks was created in response to this request and Seven Seas CROSSFIELD is the Japanese remodeled version of that series.

Seven Seas BUNCO by Watanabe Bookbinding

The beloved Tomoe
River paper

We use Tomoe River Pocketbook Paper, which is smooth and comfortable to write on, has less ink bleeding and bleeding through, and is highly compatible with fountain pens. This paper is thin and lightweight and in addition to the standard black and blue-black inks, colored inks also look beautiful on it.

Seven Seas BUNCO by Watanabe Bookbinding

Slightly larger 7mm
square grid.

The slightly larger 7mm square grid makes it easy to write difficult kanji and is also suitable for bold fountain pens. The blue-gray ruled lines are composed of dashed lines so that they do not repel ink. Printed in a color that is not too dark, it’s designed to not bother the user when writing.

Seven Seas BUNCO by Watanabe Bookbinding

Lay-flat Binding”
Meticulously Crafted for
Comfortable Writing

Even this large volume opens flat, allowing for stress-free writing right up to the center line. Each book is finished by skilled craftsmen using the Lay-flat Binding method, which combines the advantages of both machine and hand processing.

Seven Seas BUNCO by Watanabe Bookbinding

Durable cover material
with Japanese essence

The cover is finished with a binding cloth material often used on academic books to minimize deterioration over long-term use. Covers come in two light colors to match the lightweight design. The gold logo is designed to look like a Japanese family crest.

Seven Seas BUNCO by Watanabe Bookbinding

The name "BUNCO" is
rooted in Japanese
culture and history.

The product name “BUNCO” refers to the A6-size format used by Japanese publishers in the 1920s to promote literary works in a convenient size. Today, it remains a standard for published paperbacks due to its practicality, allowing Japanese people to enjoy their favorite book while traveling on the train or grabbing coffee at a café.