In addition to the classification above, the second Shijaku KATSURA classified otoshi-banashi into four categories according to the type of punchline, namely, donden (punchlines which amuse the audience with an unexpected twist to an ordinary story line), nazotoki (that suggest the answer to a riddle presented to the audience within the story), hen (that amuses the audience by taking the story on a tangent), and awase (punchlines that amuse the audience by bringing together two separate things mentioned earlier in the story).
このほかに桂枝雀(2代目)による四分類法（ドンデン、謎解き、へん、合わせ）がある。