The goal of the renovation was to preserve and expose the dwelling's original structure while creating a minimalist retreat for quiet contemplation.
It has been shortlisted for the hotel and short stay interior of the year at the Dezeen Awards 2020.
"Preserving and highlighting the house's imperfectly aged beauty is the backbone of our design philosophy," said Maana Homes.
"The beauty and soul of a traditional Japanese townhome is in its structural elements."
Prior to the renovation, Maana Kamo was in a poor condition with unsightly vinyl wall coverings, tile ceilings and broken floorboards.
These finishes were all removed, exposing the old house's rough, wooden structure and original walls that are made from clay.
These original details have been teamed with dark, moody furnishings and subdued lighting, alongside new timber walls and floors lined with traditional straw tatami mats.
Ornament is kept to a minimum throughout, while storage spaces for the hotel staff are disguised within the walls.
The lack of ornament is to ensure Maana Kamo guesthouse is "visually quiet" and free from distraction, providing occupants with space to slow down and reflect.
It also allows rooms to be easily adapted, for example, a guest room on the second floor can be quickly converted into a space for yoga and meditation.
One of the biggest changes Shigenori made to the dwelling was the repositioning of the kitchen from a narrow space at the rear of the dwelling to a larger area at the front.
This made space for a large kitchen island that is covered with layers of Urushi – a traditional Japanese lacquer made of tree sap that is water-resistant –and a wall of wooden cabinetry and shelves filled with local, handcrafted kitchenware.
Where the old kitchen once stood, Shigenori has inserted a double-vanity bathroom with a shower that overlooks a private garden at the rear of the dwelling.
The guesthouse is complete with an oversized Japanese-style bathtub that is accessed from the living room. It has a view out to the private garden and is intended to evoke the feeling of bathing in an onsen – a Japanese bathing facility positioned around a hot spring.
In 2016, Shigenori collaborated with Masashi Koyama on the restoration of a century-old machiya house in Kyoto to create an events space. Similarly to Maana Kamo, the goal of the design was to celebrate the architecture and history of the space.
Other projects up for short stay interior of the year at the Dezeen Awards 2020 include the small Escondido Oaxaca Hotel in Mexico by Decada and Carlos Couturier and OHLAB's extension of a rural hotel in Mallorca.
Photos are courtesy of Maana Homes.