Zelkova (from Georgian dzelkva, 'stone pillar') is a genus of six species of deciduous trees in the elm family Ulmaceae, native to southern Europe, and southwest and eastern Asia. They vary in size from shrubs (Z. sicula) to large trees up to 35 m (115 ft) tall (Z. carpinifolia). The bark is smooth, dark brown. Unlike the elms, the branchlets are never corky or winged. The leaves are alternate, with serrated margins, and (unlike the related elms) a symmetrical base to the leaf blade. The leaves are in two distinct rows; they have pinnate venation and each vein extends to the leaf margin, where it terminates in a tooth. There are two stipules at each node, though these are caducous (shed early), leaving a pair of scars at the leaf base. Zelkova is polygamous. Staminate flowers are clustered in the lower leaf axils of young branchlets; the perianth is campanulate, with four to six (to seven) lobes, and the stamens are short. Pistillate and hermaphrodite flowers are solitary, or rarely in clusters of two to four, in the upper leaf axils of young branchlets. The fruit is a dry, nut-like drupe with a dorsal keel, produced singly in the leaf axils. The perianth and stigma are persistent.

The name Zelkova derives from the native name of Z. carpinifolia in the Georgian language - one of the Kartvelian languages spoken in the Caucasus, as shown by the Georgian name, dzelkva, from dzeli meaning 'bar' or 'pillar', and kva meaning 'rock', 'stone' The tree was often used for making rock-hard and durable bars for building and furniture.


Zelkova は、大澤建築店株式会社
建築士 渡邉史康のプロジェクト




Zelkova - A Project by Architect: Fumiyasu Watanabe from Osawa Building Corporation
We, Zelkova, learns beautiful Osamari from Japanese traditional technology, and create new value with thinking outside the box.
Osamari-to put materials together and finish work beautifully, finding out the material properties such as wood, stones, and soil, etc.
Those buildings can be easily managed, maintained, and they are sustainable.
Unfettered thought comes from using hand tools (carpenters) or drawing blueprints (architects).
With the well handled ideas and the use of basic tools and precision machines or CAD in combination,
we can create a space that is necessary now.
Developing new ideas based on study of the past. : onkochisinn
This is a project to realize the art that integrates construction with design.
Engawa a bench furnished outside of window-, where you can feel seasons.
Zashiki, where the wind go throw.
The touch and scent of wood and tatami.
The cozy houses kept the goodness of beautiful quaint Japanese style, you will have safety and comfortableness, as well as convenience of modern technology.
Architecture can be anything depends on the environment and the person who lives there.
We produce houses with professionals and owners together.


Fumiyasu Watanabe

大澤建築店株式会社 取締役副社長

渡邉史康(ワタナベ フミヤス)・1981年長野県松本市に生まれる。大工棟梁の三男で自宅兼加工場という環境の中、幼い頃から大工職人たちの仕事ぶりを目の当たりにし、木と大工道具で遊んでいた。

Osawa building corporation vice president Second class architect
Fumiyasu Watanabe Born in Nagano, Matsumoto,1981.
As his father was a carpenter, he enjoyed playing with wood and tools in a perfect environment that has a professional workplace,
During his junior high, and high school days, Fumiyasu was attracted by graphics.
Later he started to have curiosity in arts music, clothes, videos and design.
Graduating a high school, he flew to Britain to learn fine art, then continued studying space design at Tama Art University after coming back to Japan.
In 2000’s, he traveled around Europe, the U.S., and Australia, then touched different art.
He learned various culture and got great assets through visiting museums or everywhere, and also communicating with local people in a lot of cities.
Back to his home ground Matsumoto in 2009.
Thanks to his old brother’s idea, which was to build a house, he started to work as an architect.
As he realized again the beautifulness of Japanese wooden architecture while he saw the world’s buildings, he was strongly impressed by the traditional sukiya works.
After that he got carpenter skills in 11 years experience, and now he has responsibility in all the construction from the choices of wood to sumituke, drawing blueprints, and management.
Keeping learning traditional skills in those processes, he’s now aiming to develop the skills with contemporary tools.

多摩美術大学 造形表現学部 デザイン学部 卒業
大澤建築店株式会社 取締役副社長
『木を見る目・施主と大工』ウッドデザイン賞コミュニケーション分野 受賞
Born in Matsumoto, Nagano
Graduated Tama Art University Majored Design course
Osawa building corporation vice president
Won the prize ‘Wood Design Award (Communication)
A house of Magari-sugihari

Nobuaki Osawa

大澤建築店株式会社 代表取締役社長

大澤伸章(オオサワ ノブアキ)・数寄屋大工「中村外二工務店」で9年修行し、大澤建築店3代目として事業継承したあとも研鑽を続ける大工

Osawa building corporation President First class construction carpenter
Nobuaki Osawa
Trained at Sukiya carpenter ‘Nakamura Sotoji building’ for 9 years, Osawa took over Osawa Building from his father as the third generation president, and has been devoting himself to his studies.
It is great experience for him to have learned how to work from all the seniors, and also he’s been inspired by his colleagues (used to be trainees who worked with him before) for 30 years.
His policy is ‘it’s impossible to build alone, so only when a lot of builders’ skill got together, the best one can be built.’
To make his work better, he has developed his skill day by day and has been training the juniors.
Houses with the passed down skill and experience

Osawa Kenchikuten

大澤建築店 株式会社


Not just the wall, it is Japanese space made of wooden pillars.
Our art that expose its framework and attentive makes the space beautiful.
However, we do need many other carpenters and builders to make those space.
We understand the owners’ thought, then, tell those makers their thought.
Builders’ soul falls on everywhere in the houses, and the people living there feel elated by them.
Osawa Building takes the responsibility to make such places for you.

大澤建築店株式会社 公式HP


Osawa Building provides you a place where your desire lives, here in Shinshu blessed with nature.
Location, planning, design and construction. Houses with selected materials.
Azumino, Hotaka, Mastumoto, and Matsumoto-daira, where you can see its cultural development.
With good access from the center of Tokyo, you can enjoy the scenery of Alpes mountains and the changes of four seasons.
Imagine the clear water flowing torrents, and the wind sinking in your heart in Shinshu.
We propose you new lives in this place surrounded by mountains with selected wooden houses.

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大澤建築店 株式会社HPより

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