Alter Returns to Tokyo With AI Tea Ceremony and Cedar Stools

Seventy-five international designers, most in their 20s and 30s, have taken over Nihonbashi Mitsu Hall in central Tokyo for the second edition of Alter, an exhibition that asks a pointed question about product design's value. The show runs during the 10th edition of Designart Tokyo, on view across the Japanese capital through 8 November 2026.

The exhibitors say the industry's output is growing increasingly rigid, and they want to "re-examine the value of product design". Fine words. The works on display mostly earn them.

What's on show?

A group exhibition, At First Contact, curated by Dutch designer Tim Teven, gathers texture-heavy pieces. It includes a bright green vessel by French designer Audrey Large — protruding, tentacle-like embellishments included, very much her otherworldly register. Dutch creative Teun Zwets contributes a wall-mounted mirrored cabinet in his recognisably glossy lacquered split wood. Paris studio LS Gomma shows a polyurethane rubber scone lamp whose glowing ribbed body loosely resembles a pair of lungs.

Teven's framing is precise. He selected pieces that draw attention to "reflection, gloss and wear".

"The pieces' attention to surface resonates with traditions within Japanese craft, where the effects of making, material behaviour and use remain visible in the finished object," said Teven.

Can AI host a tea ceremony?

Tariki Research Institute presents a "tea ceremony with no host", built to invert the traditional Japanese ritual. No tea master picks the cup. Instead, sensors at locations around the world collect environmental data, an AI algorithm translates it into organic shapes, and each vessel is blow-moulded into a unique form. Visitors were encouraged to drink from them. The machine chooses your cup, in other words, based on the weather somewhere else.

What about the cedar stools?

Bole, a project by London architecture studio Pan Projects with local forestry company Morisho and Nara-based wood specialist Morisuke Mei Tree Industry, takes a blunt material fact as its starting point: a typical Japanese cedar tree yields five logs, each four metres long. The collaborators cut each log into simple discs and made eight stools per log, using every part of it. At Alter, the stools stack into a large totemic column that makes the arithmetic visible.

The economics behind it are bleak.

"Today in the mountains of Japan, the market value of logs is below the value of the labour of the people who grow and care for them," the show organisers explained.

"Even though wood continues to flow through construction and manufacturing sites, most of its value never goes back to the forest. Bole was born as a response to this imbalance."

And the washi paper work?

Japanese designer Yuma Kano, washi paper specialist Gen Taniguchi of Nao Tesuki Washi, and artisan Kurara Omichi of Tokyo's Uchida Dyeing Factory present Capillary Drift: stools, vessels and material experiments in delicately dyed washi paper.

"Rather than seeing washi simply as a flat surface, we approach it as a complex network of interwoven fibres, seeking to reveal expressions hidden within the material itself," said Taniguchi.

The inaugural Alter ran during last year's Designart Tokyo, when the team told Dezeen they wanted to revive the city's "increasingly homogenous" design scene. Two editions in, the exhibition has moved from diagnosis to demonstration — sensor-grown cups and whole-log stools in place of a manifesto. Designart Tokyo 2026 runs 30 October to 8 November at venues across the city.