Renovation of a 128-Year-Old Kominka｜JYU ARCHITECT

This project involved converting a kura (traditional storehouse) adjoining a kominka in Saku City—built in 1897 (Meiji 30) and now 128 years old—into a residence.

Work began with temporary shoring of a fractured roof beam and reinforcement of the foundation of the leaning structure. The entrance joinery was heavy and seized, making operation difficult; although the client initially requested new joinery, we explored methods for reuse and were able to restore the original fittings to a smoothly operable condition.

We developed details that accommodate the addition of insulation while also achieving airtightness. The thermal performance of the main building—particularly the roof and exterior walls—was upgraded to provide a comfortable interior that remains cool in summer and sufficiently warm during harsh winters.

Existing floorboards from the kura were reworked and reused as kitchen countertops, stair treads, and counter surfaces. Plaster and paint finishes on walls and ceilings were applied by the occupants together with friends as a DIY effort.

Building Overview

Gross floor area: 80.4 m² (24.32 tsubo)
Contractor: Yoshizawa Construction

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