Where can i get Soul Eggs?

[Soul Eggs?]

Where can i get those Soul Eggs? So I dont have to fight yokais. I heard from other players that you can buy from Miroku but there's no soul eggs.

[Celie]

Soul Eggs are obtainable from

Certain quests
Miroku's bargain option (if you are lucky and have Miroku's partner level high enough)
Lucky boxes (also if you are lucky)
Shopping Plaza

[Lann]

Soul Eggs are obtainable from

Certain quests
Miroku's bargain option (if you are lucky and have Miroku's partner level high enough)
Lucky boxes (also if you are lucky)
Shopping Plaza

^ All of that, or hunt a magical girl and take it from them. You just have to run away far enough for their bodies to collapse.