works

About Our Works

BTK is a collaboration of five companies, each possessing unique metalworking technologies, coming together to create diverse products. We present examples of our works that fuse advanced technical skills with creative design, ranging from precision components to highly artistic pieces.

Transfer eyes/M-2・M3

This interior lighting fixture features a dual-layered structure where the inner part rotates to adjust the lighting. The rotation produces a beautiful moiré pattern. Precise stainless steel bending technology is essential for smooth rotation. This piece requires advanced bending skills and complex calculations to maintain structural integrity.

Material: Stainless steel
Finish: Vibration

Designer

Hidetoshi
Muramatsu

Side by Side

This flower vase, The “Side by Side” series were created by the intersection of various processing techniques on a single sheet of metal. The “Side by Side” series consists of two elements: a tube to hold flowers and a base that enhances the space and supports the flowers and branches. These series of vases provide viewers with an opportunity to think about how to process a single plate of exactly the same shape to create a vase that functions as a three-dimensional object.

Material: Aluminum, Copper
Finish: Vibration polishing, Special polishing, Painting

Designer

Naoyuki Kiyota

Chiba-kun and Friends of Japan Puzzle

Chiba-kun, the mascot character of Chiba Prefecture, is shaped like the prefecture when viewed from the side. For this project, all prefectures have been transformed into characters by adding eyes and noses, creating a Japan map puzzle. Each puzzle piece features unique stainless steel patterns by region (Tohoku, Kanto, Chubu, Kinki, Chugoku, Shikoku, and Kyushu). The background’s blue gradient represents the ocean. Authorized by Chiba Prefecture (Approval No. A1568-21).

Material: Stainless steel 430, Aluminum
Finish: Special polishing, Special printing, Clear coating

Designer

Chiharu
Sakazaki

Photography
Yoshinori Kurosawa

Metal Camper Cooler 18L

This product explores the concept: "How closely can we recreate plastic products in metal?" Achieving this required highly advanced techniques. The product showcases the collective capabilities of the Kawaguchi Machikouba team, incorporating cutting, bending, machining, and mirror finishing.

Material: Iron, Stainless steel, Brass
Finish: Mirror polishing

Designer

Yoshitaka
Tsuchiya

Porta del future – Door to the Future

My life's mission is to help realize children's dreams. I designed this artwork hoping children would envision their future with shining eyes.

Material: Aluminum
Finish: Special polishing, PF coating

Designer

Fukiko
Yamakawa

Stand Mirror Emerging from a Cylinder

This mirror appears to have been cut directly from a solid block. In fact, the cylindrical base and mirror panel were fabricated separately and precisely joined together. The matte black exterior enhances the mirror’s brightness, creating a stand mirror with a striking presence. This simple yet refined form is achievable only through the skills of local workshops.

Material: Stainless steel
Finish: Mirror polishing, Baked painting

Designer

Azumi Masui