What actors and actresses appeared in Onmyoji 2 - 2003?

You are likely referring to the Japanese film "Onmyōji" (2001), also known as "阴阳师", which is based on the novel series by Baku Yumemakura. This film was directed by Yōjirō Takita and starred Mansai Nomura as Abe no Seimei and Hidetoshi Nishijima as Minamoto no Hiromasa.

There is no known film titled "Onmyoji 2 - 2003". It is possible there has been a misunderstanding regarding the title or year.

It's worth noting that there was a sequel to "Onmyōji" titled "Onmyoji II" (2003), also directed by Yōjirō Takita. The sequel retained the same main cast members:

* Mansai Nomura as Abe no Seimei

* Hidetoshi Nishijima as Minamoto no Hiromasa

This film also featured other actors and actresses, but the main cast remained the same.