Zeals CEO Masahiro Shimizu speaks near a picture of the company's semi-domestic compact humanoid "D1" helper robot during a press preview at Shibuya Scramble Hall in Tokyo on August 5, 2026. (Photo by Andrew CABALLERO-REYNOLDS / AFP via Getty Images)

Zeals CEO Masahiro Shimizu (R) stands next to the company's semi-domestic compact humanoid "D1" helper robot during a press preview at Shibuya Scramble Hall in Tokyo on August 5, 2026. (Photo by Andrew CABALLERO-REYNOLDS / AFP via Getty Images)

Zeals semi-domestic compact humanoid "D1" helper robot is seen on the stage during a press preview at Shibuya Scramble Hall in Tokyo on August 5, 2026. (Photo by Andrew CABALLERO-REYNOLDS / AFP via Getty Images)

Zeals semi-domestic compact humanoid "D1" helper robot waves on the stage during a press preview at Shibuya Scramble Hall in Tokyo on August 5, 2026. (Photo by Andrew CABALLERO-REYNOLDS / AFP via Getty Images)

Zeals CEO Masahiro Shimizu (R) takes a tray of medical supplies from the company's semi-domestic compact humanoid "D1" helper robot during a press preview at Shibuya Scramble Hall in Tokyo on August 5, 2026. (Photo by Andrew CABALLERO-REYNOLDS / AFP via Getty Images)

Zeals CEO Masahiro Shimizu (R) gestures next to the company's semi-domestic compact humanoid "D1" helper robot during a press preview at Shibuya Scramble Hall in Tokyo on August 5, 2026. (Photo by Andrew CABALLERO-REYNOLDS / AFP via Getty Images)

Zeals CEO Masahiro Shimizu (R) holds the arm of the company's semi-domestic compact humanoid "D1" helper robot during a press preview at Shibuya Scramble Hall in Tokyo on August 5, 2026. (Photo by Andrew CABALLERO-REYNOLDS / AFP via Getty Images)

This picture taken on May 9, 2026 shows Japanese product designer and engineer Satoshi Nakagawa taking part in an interview with AFP at the "Ku-An" test lab in Hitachi-ota, Ibaraki Prefecture. Glinting in the night halfway up a hill in Japan, the greenhouse-like "Ku-An" test lab is lit up by electricity harnessed from 1,500 wooden boxes of soil and compost. Designer Satoshi Nakagawa has long battled sceptics, but believes that the technology powering the 800 LEDs has a role to play in solving humanity's energy conundrum. (Photo by Philip FONG / AFP via Getty Images) / To go with AFP story Japan-climate-electricity-technology, FEATURE by Hiroshi Hiyama