Answer: Supplier dependence
Step-by-step explanation:
Supplier dependence is the extent to which a firm (buyer) relies on the product of another firm (supplier) because of the importance of the supplier's products to it's own manufacturing process. The degree to which a buyer is dependent on a supplier's product is largely affected by the difficulty of accessing such products from another seller. In this case, 97% of this rare-earth materials are supplied by Chinese firms, the ban will greatly affect Hitachi manufacturing process.