The city of Choshi in Chiba prefecture, Japan has an abundance of interesting geological features. The oldest strata date as far back as the Jurassic period (150 million years ago) and the Cretaceous period (120 million years ago). Even the newest strata, which created Byobugaura Ciffs pictured above, are from the Neogene period (23 million years ago).


These Geo-mugs and Geo-guinomi sake cups were created to help to promote the activities of the Choshi Citizens Geopark Promotion Committee, set up in order to gain recognition for these geographical features with the aim of preserving Choshi's precious natutal heritage. On September 24th, 2012, the city succeeded in achieving recognition as an area of important geological features from the Japanese Geoparks Network and "Choshi Geopark" officially came into being.


Each item has been especially created for us by Tokoname craftsman, Mr. Kenji Hotta, who is renowned for his “nerikomi” technique. This is a process by which different colored clays are blended together to create the marbled effect seen on these items. The marbling creates layers of color which reflect the strata of the Byobugaura Cliffs in Choshi.

The pieces are all individually handcrafted on the potter’s wheel, ensuring that no piece is exactly alike and each item seems to take on a familiar character the more it is used.


Choshi Citizens Geopark Promotion Committee (in Japanese):


Below is a selection of items available. If you have any particular preferences regarding color, size etc. there may be other items in stock to meet your needs. Please do not hesitate to contact us and we will do our best to help.


Choshi Geo Mug
(The vol. is measured by filling upto the rim.)

Large Mugs

#1 - Approx. size: diameter: 3.4" (8.7cm), Height: 4.7" (12cm) , Vol. approx.18.9 oz (560ml) SOLD OUT


#2 - Approx. size: diameter: 3.2" (8.3cm), Height: 4.7" (12cm) , Vol. approx.20 oz (600ml) SOLD OUT


#3 - Approx. size: diameter: 3.6" (9.3cm), Height: 4.6" (11.7cm) , Vol. approx.17.5 oz (520ml) SOLD OUT


US$37.00 each+shipping


#4 - Approx. size: diameter: 2.8" (7.3cm), Height: 3.6" (9.2cm) , Vol. approx.11.4 oz (340ml) SOLD OUT


#5 - Approx. size: diameter: 2.9" (7.5cm), Height: 3.8" (9.7cm) , Vol. approx.12.5 oz (370ml) SOLD OUT


#6 - Approx. size: diameter: 3.1" (8.1cm), Height: 4" (10.2cm) , Vol. approx.10.4 oz (310ml) SOLD OUT


US$30.00 each+shipping

Choshi Geo Guinomi

Guinomi sake cup

#1 - Approx. size: diameter: 2.3" (5.9cm), Height: 1.5" (4cm) , Vol. approx.2.1 oz (65ml) SOLD OUT


#2 - Approx. size: diameter: 2.1" (5.4cm), Height: 2" (5.2cm) , Vol. approx.2.3 oz (70ml)


#3 - Approx. size: diameter: 2.1" (5.4cm), Height: 1.9" (3.8cm) , Vol. approx.1.6 oz (50ml) SOLD OUT


US$20.00 each+shipping


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