What does Hizamaru do in CK3?

Prowess +2, Prestige +0.2/month, Control Growth +15% (patch 1.20.0.3).

How do you get Hizamaru with the console?

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

Personal artifact · Weapon

Hizamaru

Masterwork

Hizamaru is a masterwork weapon artifact in Crusader Kings III: Prowess +2, Prestige +0.2/month, Control Growth +15%. Quality 30 and wealth 30; maximum durability 75, and it does not wear out. Made on 950.1.1 for Mitsunaka Minamoto in Dazaifu. At game start it goes to the holder of Kawachi Family and the holder of Company of Yoshitsune (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 Hizamaru do in CK3?: Prowess +2, Prestige +0.2/month, Control Growth +15% (patch 1.20.0.3).
How do you get Hizamaru with the console?: effect create_artifact_hizamaru_sword_effect = { OWNER = root } — runs the scripted effect that makes it, for the character you play (debug mode).

This sword was commissioned along with Higekiri by Minamoto no Mitsunaka, and passed down the Seiwa Minamoto family.

Effects

History and who has it

Made on 950.1.1 for Mitsunaka Minamoto in Dazaifu.
At game start: the holder of Kawachi Family.
At game start: the holder of Company of Yoshitsune (starts from 1178.10.1).

How it is made

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

effect create_artifact_hizamaru_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 (hizamaru_sword_modifier) and the English localisation, Crusader Kings III 1.20.0.3.