Ep. 12: Osomatsu and Totoko review episodes to crown the biggest Losermatsu in the year-end special
Aired on December 22, 2015

12
During the year-end special, Osomatsu and Totoko examine previous episodes to determine who qualifies as the biggest Losermatsu. The two characters engage in a retrospective analysis of past events to settle the competition. This segment focuses on their evaluation process as they look back at the series history to identify the most prominent loser among the Matsuno brothers. The narrative centers on their discussion and final decision regarding this specific title within the context of the annual special event.
Episodes
- Ep. 8 · Osomatsu acts as a calming detective while the Matsunos help Totoko gain popularity as a fish idol
- Ep. 9 · Chibita and Oden / Juushimatsu Falls in Love
- Ep. 10 · Iyami and Chibita Transform into Girls to Charm the Matsuno Brothers
- Ep. 11 · Christmas-themed skits featuring the Matsuno brothers in various holiday scenarios
- Ep. 12 · Osomatsu and Totoko review episodes to crown the biggest Losermatsu in the year-end special
- Ep. 13 · Osomatsu discovers Choromatsu engaged in a deeply private and embarrassing activity
- Ep. 14 · The Sextuplets Catch a Cold and Todomatsu Faces Confrontation
- Ep. 15 · Juushimatsu attends an interview while the Girlymatsus travel and Chibita discovers life beyond oden
- Ep. 16 · The Matsus confront the century's end while Ichimatsu faces a dilemma involving Karamatsu