/Jojo' Bizarre Adventure/ 1-6 are around 20 pages per chapter, 7-8 are 40 pages per chapter.
Disclaimer: Some Chapters may vary and exclude some title cards on top and bottom could equal to 18-19 instead.
Part 1: 44 Part 2: 69 Part 3: 152 Part 4: 174 Part 5: 155 Part 6: 158 / Part 7: 95 Part 8: 91-