Open 100 Chests on Narukami Island, Kannazuka, and Yashiori Island in Inazuma.

Practice in TRAINING. What's important for a sumo is daily training... Head-to-head training that is!

MEOW!

Cleared all 52 dungeons

Completed all 62 side quests

Cleared 25 dungeons

Obtained all 7 skills

Obtained 30 armor or weapons

Completed 30 side quests

Located half the monuments

Reached level 10

Cleared 5 dungeons

Obtained 3 armor or weapons