and other officials bow at the start of a news conference in the company's headquarters early Saturday. KYODO PHOTO

The Ministry of Economy, Trade and Industry announced Friday that Rinnai's RUS-5RX and RUS-51BT models have caused five cases of carbon monoxide poisoning since 2000, killing three people and sickening 12 others. Ventilation is needed for these models because they release exhaust gas into rooms.

Our Planet

Hidetaka Ishii, an official at the Chiba Municipal Government, says close coordination with private-sector operators is key for regional decarbonization efforts.
Japan’s climate heroes show potential and limits of local initiatives

Longform

Visitors walk past Sou Fujimoto's Grand Ring, which has been recognized as the largest wooden structure in the world.
Can a World Expo still matter? Japan is about to find out.