Kawaii Box Anniversary Deal: Get $5 Off Your First Box! Posted by Hello Subscription on April 17, 2018. Subscription Box Coupons & Deals / Kawaii Box Coupons Hello Subscription may earn compensation via links in this post. Read the full disclosure Save for Later Notification Kawaii Box is celebrating their 4th year anniversary! Take $5 off your first box with code HAPPYBD. Boxes will ship immediately! Visit Kawaii Box to get this deal!