Ladd's Japanese voice actor is Hellsing's Alucard?

I can usually tell Joji Nakata's (Alucard in 'Hellsing') voice in his past work, but I'm unable to confirm this as IMDB hasn't listed Gungrave in Nakata's profile or included him in Gungrave's cast list.

I was wondering if anyone knew of a detailed website with the Japansese version's cast list?