This is an office relocation project for Katariba, a certified nonprofit organization committed to creating a society where all young people—regardless of their upbringing—can nurture the creativity and motivation to shape their own futures. In a post-pandemic work environment, with around 80% of staff working remotely, the project was developed in close collaboration with the client to explore the purpose and value of gathering in a shared space. In response to the client’s desire to “create spaces that foster dialogue,” the design centers on the concept of the engawa—a traditional Japanese architectural element that blurs the boundary between inside and outside. Engawa-like features were incorporated on each floor to encourage casual, spontaneous interaction, such as placing benches face-to-face or installing high counters along circulation paths. The overall space is unified in soft gray tones, accented by “Katariba Green,” the organization’s signature color, to create a warm and approachable atmosphere. Signage was designed by YOHAK DESIGN STUDIO, and sound design was handled by Sound Couture Inc., resulting in a spatial experience that engages both sight and sound. The conversations and connections that emerge here will continue to deepen the value of the space over time.



















Office @ Nakano, Tokyo
Design: Sunao Koase, (Ayaka Seki) /SNARK Inc.
Client: Katariba
Sign design, Color direction: Taku Sasaki, Yua Houzaki, Leo Arimoto /YOHAK DESIGN STUDIO
Steel products: gambit
Construction: Total Project
Sound design: Sound Couture Inc.
Acoustic design: Fly Sound Inc.
Total area: 485.3㎡
Completion: Oct. 2024
Photo: Ippei Shinzawa
Design: Sunao Koase, (Ayaka Seki) /SNARK Inc.
Client: Katariba
Sign design, Color direction: Taku Sasaki, Yua Houzaki, Leo Arimoto /YOHAK DESIGN STUDIO
Steel products: gambit
Construction: Total Project
Sound design: Sound Couture Inc.
Acoustic design: Fly Sound Inc.
Total area: 485.3㎡
Completion: Oct. 2024
Photo: Ippei Shinzawa