Yes...Dark Souls is a JRPG. Any RPG game that is made in Japan, even if the people making it themselves aren't Japanese, is still a JRPG. The same holds true for WRPG titles. (An outside example can be found through the short anime Shelter) However, calling Dark Souls simply a JRPG is very vague, as there is a decent spectrum of what can be called an RPG in the first place. To be specific, Dark Souls is a Japanese ARPG.