Glass Studio JUNCOBO

Glass Studio JUNCOBO works with a local woodworker to offer products made of wood and glass. Its icicle-like sake cups are a condensation of the winter landscape in Asahikawa.


The Kigurasu

The Kigurasu (Wood Glass) series of sake cups combines a stand made from Hokkaido-grown wood and a conical, blown-glass drinking vessel, and is a collaborative effort between Glass Studio JUNCOBO, a glasswork specialist, and a local woodwork artist. The cup is lifted from the stand when drinking. The glass cups have just the right thickness and unevenness to fit in one’s hand, and light is refracted in different ways depending on the angle they are held, making the drink even more appetizing. Sipping sake, wine, or other drink from these cups is one way of enjoying the cold and long winter nights of Asahikawa.

Guinomi (Sake Cups)

Guinomi are cups to gulp down sake in a single draft, and like other items in the Kugurasu series, the cups are lifted from the stand when using them. The surface of the Guinomi cups are designed in the image of icicles that form in front of homes in snowy Asahikawa and have motifs that call to mind snow swirls, blizzards, and crevices. In addition to sake, they can also be used as shot glasses to drink whiskey.


Katakuchi (Sake Servers)

These servers are made from hand-blown glass, and so each has a distinctive shape and character. The aroma and taste of sake will change depending on the vessel in which it is served, and is often said that the most aromatic and gentlest-tasting sake is one that is first poured into a Katakuchi server from a large bottle and then into a cup.

Product List

Junsuke Sugai


Born in 1952. Mesmerized by the plate glass he saw at Biei Station, Sugai decided to become a glass artist. After working a glass factory, he established Glass Studio JUNCOBO in Kitanoarashiyama in 1986. Sugai makes special order plate glass for public buildings and private residences. “Ki-glass,” which he co-developed with a wooden crafts artist in the Asahikawa region, is one of his most well known works. His works incorporate Asahikawa’s unique landscape while using the materials’ natural form.

I want to make designs that nestle up to,
rather than dominates, the materials used.




Glass melted in the furnace is collected using a blowpipe. The artisan shapes the glass by rotating the blowpipe and slowly blowing air into the glass.
The artisan has a trained eye and an acute intuition, which he uses to finalize the form of the glass while making sure that its shape and size are perfect.
Sheet glass initially stimulated Sugai’s interest in glass. The walls of his studio entrance are made of his handmade sheet glass.

The Asahioka district of the city of Asahikawa is located in a hilly, scenic area some 5 kilometers northwest of downtown. Known as the “Arashiyama of the North” after the famed district in Kyoto, Asahioka is a residential neighborhood that boasts many workshops for woodworking, ceramics, and dyeing, as well as restaurants and galleries. One such workshop is Glass Studio JUNCOBO, a glassworks studio founded by Junsuke Sugai in 1986. While specializing in glassworking, Juncobo has collaborated with woodworking artists in the Asahioka district to launch a series of items combining wood and glass. The square, white-walled building that houses Glass Studio JUNCOBO doubles as a studio and showroom, and the entrance features various sheet glass products, which initially piqued Sugai’s interest in glass.

Glass Studio JUNCOBO

2-8-1 Asahioka, Asahikawa, Hokkaido