Water purifier cartridge JC0036UG, manufactured by Takagi Co., Ltd. - Model number: JC0036UG - Manufacturer: Takagi Co., Ltd. - Application: Water purifier cartridge Thank you for viewing. This item has been stored at home unopened and unused after purchase. It was manufactured in 2019, so it is offered at a slightly reduced price. According to Takagi's website: Unopened cartridges: No expiration date: There is no particular expiration date because the performance does not deteriorate if unopened. Early use is recommended: However, even in an unopened state, there is a possibility of absorbing odors, so it is recommended to start using it as soon as possible after it arrives. Please consider purchasing with the above in mind.