https://www.cnet.com/roadshow/news/toyota-expanding-fuel-cell-production/

As it works to increase sales of fuel cell cars worldwide, Toyota is scaling up its production of two key components for the green vehicles. Production of hydrogen fuel cell stacks is moving to a new, 750,000 square-foot facility within Toyota City, Japan, while a new line for building hydrogen tanks will be built within the company's Shimoyama Plant.

Both of the new production facilities are expected to come online around 2020. Fuel cell stacks are the components that combine hydrogen and oxygen to produce electricity, while the tanks are made from carbon fiber for strength to hold highly pressurized hydrogen.