What does Dojigiri do in CK3?

Prowess +2, Prestige +0.2/month, Monthly Renown +5% (patch 1.20.0.3).

How do you get Dojigiri with the console?

effect create_artifact_dojigiri_sword_effect = { OWNER = root } — runs the scripted effect that makes it, for the character you play (debug mode).

Personal artifact · Weapon

Dojigiri

Masterwork

Dojigiri is a masterwork weapon artifact in Crusader Kings III: Prowess +2, Prestige +0.2/month, Monthly Renown +5%. Quality 30 and wealth 30; maximum durability 75, and it does not wear out. Made on 880.1.1 for Toshihito Uona-ryū in Kume. At game start it goes to the holder of Uona-ryū Family and the holder of Ōshū Family (starts from 1178.10.1). Patch 1.20.0.3, from game/common/scripted_effects/01_exp1_historical_artifacts_creation_effect.txt.

Quick answers (2)

What does Dojigiri do in CK3?: Prowess +2, Prestige +0.2/month, Monthly Renown +5% (patch 1.20.0.3).
How do you get Dojigiri with the console?: effect create_artifact_dojigiri_sword_effect = { OWNER = root } — runs the scripted effect that makes it, for the character you play (debug mode).

This sword was forged by the famed smith Yasutsuna for Fujiwara Toshihito, and passed down the Fujiwara family.

Effects

History and who has it

Made on 880.1.1 for Toshihito Uona-ryū in Kume.
At game start: the holder of Uona-ryū Family.
At game start: the holder of Ōshū Family (starts from 1178.10.1).

How it is made

The game creates it with the scripted effect create_artifact_dojigiri_sword_effect. In the console (how to open it), this gives it to the character you play:

effect create_artifact_dojigiri_sword_effect = { OWNER = root }

Built from the effect's file; not run in the game by us.

Source: game/common/scripted_effects/01_exp1_historical_artifacts_creation_effect.txt, common/modifiers (dojigiri_sword_modifier) and the English localisation, Crusader Kings III 1.20.0.3.