Okagesama de (お陰様で): thanks to you. A Japanese explainer notes that it carries the meaning: “I could not have done it alone, but I was able to do it thanks to you.”
Ichigan (一丸): one lump. The Daijisen dictionary defines it as a single mass with one heart. Its example: zen’in ichigan to natte nankyoku o kirinukeru, everyone becomes one to get through a crisis.