Kengo Kuma and Ryuichi Sakamoto team up to create architectural building blocks

Where Denmark has Lego, Japan has 'tsumiki'. Meaning 'wooden blocks' in Japanese, Tsumiki is also the name of the new project that has just been launched by internationally acclaimed, Tokyo based architect Kengo Kuma, who is behind this new set of playful wooden blocks for children of all ages.
'I have loved tsumiki my whole life, ever since I was a young boy,' says Kuma. 'And my dream came true, I designed tsumiki myself, the sort which hadn't existed before.' The set is 'not a heavy, masonry kind of wood block, but a light, transparent system just like what you see in traditional Japanese architecture', continues the architect.
Known for his tireless explorations of timber construction, which have resulted in striking wood crafted works such as the Asakusa Culture and Tourism Center and the Daiwa Computing Research Building, Kuma is passionate about the age-old building material. This new foray into scaled wood construction is sure to bring out the child – and the architect – in everyone. Made of Japanese cedar wood, the elements can be combined and stacked to create small buildings and sculptures.
Created in collaboration with musician Ryuichi Sakamoto and his forest conservation organisation More Trees, this architectural game can be used to create structures of all shapes and sizes - as well as raise awareness about the environmental problems caused by the dangerous deforestation on our planet.
The project was created in collaboration with musician Ryuichi Sakamoto and his forest conservation organisation, More Trees
Kuma always loved tsumiki, he explains, and now he had the chance to design a set of his own
Apart from providing the building blocks to create structures of all shapes and sizes, the set also helps raise awareness about the environmental problems caused by deforestation
INFORMATION
For more information on Kengo Kuma visit the website
Photography: Ikunori Yamamoto
Wallpaper* Newsletter
Receive our daily digest of inspiration, escapism and design stories from around the world direct to your inbox.
Ellie Stathaki is the Architecture & Environment Director at Wallpaper*. She trained as an architect at the Aristotle University of Thessaloniki in Greece and studied architectural history at the Bartlett in London. Now an established journalist, she has been a member of the Wallpaper* team since 2006, visiting buildings across the globe and interviewing leading architects such as Tadao Ando and Rem Koolhaas. Ellie has also taken part in judging panels, moderated events, curated shows and contributed in books, such as The Contemporary House (Thames & Hudson, 2018), Glenn Sestig Architecture Diary (2020) and House London (2022).
-
Slate is an ultra-simple EV truck intended as an affordable and customisable workhorse
Slate designer Tisha Johnson discusses her role at the US electric truck start-up, a company that wants its customers to have complete freedom of expression
-
Teenage Engineering switches to the dark side with the Field System Black series
None more black: TE’s studio in a pocket is reissued in a new matte black finish to match the cult audio company’s OP-XY sequencer
-
The world of Bart Prince, where architecture is born from the inside out
For the Albuquerque architect Bart Prince, function trumps form, and all building starts from the inside out; we revisit a profile from the Wallpaper* archive, first published in April 2009
-
Naoshima New Museum of Art is a home for Asian art, and a lasting legacy, in Seto Inland Sea
The Naoshima New Museum of Art opens, marking a seminal addition to the Japanese island's renowned Benesse Art Site Naoshima; we explore Tadao Ando's design
-
Behind a contemporary veil, this Kyoto house has tradition at its core
Designed by Apollo Architects & Associates, a Kyoto house in Uji City is split into a series of courtyards, adding a sense of wellbeing to its residential environment
-
Kazuyo Sejima and Ryue Nishizawa on harmony, nature and their RIBA gong
The SANAA duo are celebrating their RIBA Royal Gold Medal 2025 in London today, and talked to us about self-reflection, the year ahead, and the need to create harmony in our environment
-
New book 'I-IN' brings together Japanese heritage and minimalist architecture at its finest
Japanese architecture studio I-IN flaunts its expert command of 21st-century minimalism in a new book by Frame Publishers
-
Giant rings! Timber futurism! It’s the Osaka Expo 2025
The Osaka Expo 2025 opens its microcosm of experimental architecture, futuristic innovations and optimistic spirit; welcome to our pick of the global event’s design trends and highlights
-
2025 Expo Osaka: Ireland is having a moment in Japan
At 2025 Expo Osaka, a new sculpture for the Irish pavilion brings together two nations for a harmonious dialogue between place and time, material and form
-
Tour the brutalist Ginza Sony Park, Tokyo's newest urban hub
Ginza Sony Park opens in all its brutalist glory, the tech giant’s new building that is designed to embrace the public, offering exhibitions and freely accessible space
-
A first look at Expo 2025 Osaka's experimental architecture
Expo 2025 Osaka prepares to throw open its doors in April; we preview the world festival, its developments and highlights