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.

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

Celie wrote: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.