Okuyasu and Keicho Nijimura (虹村億泰·形兆, Nijimura Okuyasu, Keichō) is the thirtieth volume of the JoJo's Bizarre Adventure manga. It is also the second volume of Diamond Is Unbreakable. It covers the rest of The Nijimura Brothers story arc.
Chapters
- 010 (275). The Nijimura Brothers (2)
- 011 (276). The Nijimura Brothers (3)
- 012 (277). The Nijimura Brothers (4)
- 013 (278). The Nijimura Brothers (5)
- 014 (279). The Nijimura Brothers (6)
- 015 (280). The Nijimura Brothers (7)
- 016 (281). The Nijimura Brothers (8)
- 017 (282). The Nijimura Brothers (9)
- 018 (283). The Nijimura Brothers (10)