1. Mass production: In order to meet the market demand and expand the sales scale, Uniqlo may mass produce clothing and footwear products, resulting in a backlog of inventory.
2. Seasonal sales: Some styles of clothing and footwear products are only suitable for sale in a certain season. If sales are not as expected, it may lead to a backlog of inventory.
3. Marketing strategy: Uniqlo may adopt some promotion and discount strategies to clear inventory and promote sales. However, if these strategies are not effective enough, it may lead to inventory backlog.