Au (mobile phone company)
| Industry | Telecommunications | 
|---|---|
| Founded | 1 November 2000 | 
| Headquarters | Japan | 
| Products | Chaku-Uta-Full, LISMO | 
| Parent | KDDI | 
| Website | au | 
au, or au by KDDI, is a Japanese mobile phone operator. au is a brand marketed by KDDI in the main islands of Japan and by Okinawa Cellular in Okinawa for their mobile cellular services. au is the second-largest wireless carrier in Japan, with 60.398 million subscribers as of March 2021.