Apple announced on Tuesday that it has improved its supply chain channels in Japan over the past five years. The investment has exceeded 100 billion US dollars.

Cook said in a tweet on Monday that he visited Kumamoto Prefecture in southwestern Japan, where many semiconductor and leading technology company factories are located, including the factory under construction by TSMC.

Apple said in a statement that since 2019, it has increased spending with suppliers in Japan by more than 30%, and its supply chain network covers nearly 1,000 companies ranging from multinational corporations to family-owned businesses.

Apple said Sony Group is one of its largest suppliers of camera sensors for iPhones in Japan, while citing small and medium-sized businesses including textile company Inoue Ribbon Industry Co and mold maker Shincron Co.

Apple said 29 Japanese suppliers, including Sony, Murata Manufacturing Co, Keiwa Inc, Fujikura and Sumitomo Electric Industries, have pledged to shift Apple-related operations to use renewable energy by 2030. Below are a series of Tweets that Apple's CEO sent out yesterday.

Tweets from Apple's CEO Tim Cook

Thank you to the Apple Ginza team for the warm welcome back to Tokyo — and for all you do for our customers! pic.twitter.com/PYHwE5ursm

— Tim Cook (@tim_cook) December 13, 2022

We’ve been partnering with Sony for over a decade to create the world’s leading camera sensors for iPhone. Thanks to Ken and everyone on the team for showing me around the cutting-edge facility in Kumamoto today. pic.twitter.com/462SEkUbhi

— Tim Cook (@tim_cook) December 13, 2022

Kumamoto’s Gofuku Elementary is finding new ways to weave creativity and technology into the classroom. These young creators are using iPad to bring the classic story of "The Booyoo Tree" to life. pic.twitter.com/gdSf8YMeAE

— Tim Cook (@tim_cook) December 13, 2022

Japan’s next generation of developers are already changing the world, one app at a time! https://t.co/mOKTAVsoBp

— Tim Cook (@tim_cook) December 12, 2022

Japan’s next generation of developers are already changing the world, one app at a time! https://t.co/mOKTAVsoBp

— Tim Cook (@tim_cook) December 12, 2022

Great to be back in Japan! Visited the historic Kumamoto Castle and learned about their work to restore this incredible landmark. 🇯🇵 pic.twitter.com/SOGAqnfud4

— Tim Cook (@tim_cook) December 12, 2022