How do you get Shichishitō with the console?

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

Court artifact · Pedestal Item

Shichishitō

Illustrious

Shichishitō is an illustrious pedestal item artifact in Crusader Kings III: Court grandeur baseline +6, Prestige +0.25/month, Personal scheme success chance max +5%, Diplomacy +1. Quality 100 and wealth 100; maximum durability 150, and it does not wear out. At game start it goes to the holder of Chrysanthemum Throne (starts from 867.1.1). Patch 1.20.0.3, from game/common/scripted_effects/01_exp1_historical_artifacts_creation_effect.txt.

Quick answers (2)

What does Shichishitō do in CK3?: Court grandeur baseline +6, Prestige +0.25/month, Personal scheme success chance max +5%, Diplomacy +1 (patch 1.20.0.3).
How do you get Shichishitō with the console?: effect create_artifact_pedestal_seven_branched_sword_effect = { OWNER = root } — runs the scripted effect that makes it, for the character you play (debug mode).

The 'Seven-branched Sword', an iron blade with seven flame-like forks, is said to have been a gift of friendship to the Ten'nō, sent across the sea by the king of Baekje long ago.

Effects

Court grandeur baseline+6
Prestige+0.25/month
Personal scheme success chance max+5%
Diplomacy+1

History and who has it

Made before recorded history.
Kept with the title Chrysanthemum Throne from 503.3.3.
At game start: the holder of Chrysanthemum Throne (starts from 867.1.1).

How it is made

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

effect create_artifact_pedestal_seven_branched_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 (seven_branched_sword_modifier) and the English localisation, Crusader Kings III 1.20.0.3.