As of my last update in October 2023, there has been no official announcement regarding a second season of "Dororo." The series, which aired in 2019, is a reimagining of the classic manga by Osamu Tezuka and was well-received by both fans and critics. However, typically, the decision to produce a sequel depends on various factors, including viewership, sales, and the availability of source material.
For the most current information, I recommend checking official anime news sources, announcements from the production companies, or following related social media channels.