C Ceramic goods are increasingly familiar to human life and reach all levels of society in the world, both lower, middle and upper classes, in terms of their use as household appliances, hotels and restaurants as well as jewelry. In order to meet this fairly basic human need at an affordable price, considering the current monetary crisis situation, PT. Sango Ceramics Indonesia as one of the ceramic producers in Indonesia is trying to improve its production system with the aim of reducing waste from an operational perspective. Therefore, improvements are needed in the production system and the raw material inventory control system. After conducting preliminary research, it is proposed to implement a Just-In-Time Production System at PT. Sango Ceramics Indonesia. From the results of the preliminary research, several main problems can be identified, namely excessive accumulation of raw materials and an information system that is not fast enough to respond to demands for changes in the production schedule, the accumulation of work-in-process and the lengthy time to retrieve raw materials from the warehouse. For this reason, the required data is identified. The data includes the condition of raw materials, the condition of the raw material location, the current method of controlling raw material inventory, the amount of raw material requests and production process procedures. The proposal to control raw material inventory so that it does not pile up and take up space is to use a Kanban system by applying the principle of a tank system. Improvements were also made by designing the Kanban card format, designing Express Kanban to anticipate material shortages, and designing Kanban system regulations. In the production process, problems that occurred were the information system that was slow to respond to demands for changes in the production schedule, the accumulation of work-in-process and the long time to retrieve balm materials from the warehouse. To overcome these problems, a special Kanban mechanism was proposed for the Preparation section. Next, the design was analyzed and compared with the old system. Things analyzed included reducing the maximum amount of inventory and space needed to store raw materials, the speed of responding to changes in the production schedule, the speed of warehouse employee service, production space requirements and the speed of preparing orders to suppliers. The proposed implementation of the Kanban system is expected to overcome existing problems. With the implementation of the Kanban system, it is also possible to reduce waste in the company from an operational perspective. The analysis results show that the application of the Kanban system in raw material inventory control can reduce the maximum amount of inventory by 75% and save raw material storage space so that the storage warehouse is neat and orderly. This condition supports the speed of warehouse service and the speed of preparing orders for raw materials that are almost out of stock to suppliers. In the production process section, there are also improvements in responding to changes in production schedules and the production room has become more spacious because it is not filled with excessive work-in-process materials.