A Grade (級 Kyū?) refers to the power scaling system that ranks ranging from grades one to four, and special grade, in order to categorize the strength of jujutsu sorcerers, cursed spirits, cursed objects and cursed tools.
Jujutsu High assigns their sorcerer's grades to assess their skill level ascending from Grade 4 to Grade 1. Students generally start at Grade 4 upon joining the school, but this depends on experience.
Cursed spirits are ranked on a similar scale but not exact. Sorcerers are expected to take on missions involving curses of the same level. A Grade 2 sorcerer should be able to defeat a Grade 2 curse because their skill level is closer to the strength of a Grade 1 curse.
Cursed tools are also categorized from grades 1 to 4 based on power and potency. The higher the grade, the greater advantage in battle. All Special Grade cursed tools except for Playful Cloud are imbued with a cursed technique.
If traditional weapons were used against curses and sorcerers measured their effectiveness as a gauge:
- Grade 4 (四級 Yonkyū?): "A wooden bat is enough."
- Grade 3 (三級 Sankyū?): "If you have a handgun, you can rest easy."
- Semi-Grade 2 (準二級 Jun Nikyū?):
- Grade 2 (二級 Nikyū?): "Close call with a shotgun."
- Semi-Grade 1 (準一級 Jun Ikkyū?):
- Grade 1 (一級 Ikkyū?): "Even a tank might be insufficient."
- Special Grade 1 (特別一級 Tokubetsu Ikkyū?):
- Special Grade (特級 Tokkyū?): "Cluster bombs might work".
Jujutsu sorcerers can be promoted up in rank by receiving a recommendation from a sorcerer of a higher rank. The higher the rank, the more a sorcerer is paid for the more dangerous jobs that come with it. When it comes to students, their teachers are not permitted to submit a recommendation for their promotion.
When it comes to being promoted to Grade 1, upon receiving recommendations from two or more sorcerers of that rank, the nominee will accompany a sorcerer of that level on several missions. The one who accompanies the nominee can't be the same person who put in the recommendation. If they perform well on these missions, the nominee will be granted a Semi-Grade 1 rank and be assigned a mission to exorcise a Grade 1 alone. Based on the outcome of that, the decision to permit or deny Grade 1 status will be decided.